Transform legacy format to harness assertions

test/built-ins/DataView/prototype/Symbol.toStringTag.js

@@ -14,7 +14,11 @@ includes: [propertyHelper.js]
 features: [Symbol.toStringTag]
 ---*/
 
-assert.sameValue(DataView.prototype[Symbol.toStringTag], 'DataView');
+assert.sameValue(
+  DataView.prototype[Symbol.toStringTag],
+  'DataView',
+  'The value of DataView.prototype[Symbol.toStringTag] is expected to be "DataView"'
+);
 
 verifyNotEnumerable(DataView.prototype, Symbol.toStringTag);
 verifyNotWritable(DataView.prototype, Symbol.toStringTag);

test/built-ins/Date/S15.9.2.1_A1.js

@@ -9,73 +9,63 @@ info: |
 es5id: 15.9.2.1_A1
 description: Checking type of returned value
 ---*/
+assert.sameValue(typeof Date(), "string", 'The value of `typeof Date()` is expected to be "string"');
+assert.sameValue(typeof Date(1), "string", 'The value of `typeof Date(1)` is expected to be "string"');
+assert.sameValue(typeof Date(1970, 1), "string", 'The value of `typeof Date(1970, 1)` is expected to be "string"');
 
-//CHECK#1
-if (typeof Date() !== "string") {
-  throw new Test262Error('#1: typeof Date() should be "string", actual is ' + (typeof Date()));
-}
+assert.sameValue(
+  typeof Date(1970, 1, 1),
+  "string",
+  'The value of `typeof Date(1970, 1, 1)` is expected to be "string"'
+);
 
-//CHECK#2
-if (typeof Date(1) !== "string") {
-  throw new Test262Error('#2: typeof Date(1) should be "string", actual is ' + (typeof Date(1)));
-}
+assert.sameValue(
+  typeof Date(1970, 1, 1, 1),
+  "string",
+  'The value of `typeof Date(1970, 1, 1, 1)` is expected to be "string"'
+);
 
-//CHECK#3
-if (typeof Date(1970, 1) !== "string") {
-  throw new Test262Error('#3: typeof Date(1970, 1) should be "string", actual is ' + (typeof Date(1970, 1)));
-}
+assert.sameValue(
+  typeof Date(1970, 1, 1, 1),
+  "string",
+  'The value of `typeof Date(1970, 1, 1, 1)` is expected to be "string"'
+);
 
-//CHECK#4
-if (typeof Date(1970, 1, 1) !== "string") {
-  throw new Test262Error('#4: typeof Date(1970, 1, 1) should be "string", actual is ' + (typeof Date(1970, 1, 1)));
-}
+assert.sameValue(
+  typeof Date(1970, 1, 1, 1, 0),
+  "string",
+  'The value of `typeof Date(1970, 1, 1, 1, 0)` is expected to be "string"'
+);
 
-//CHECK#5
-if (typeof Date(1970, 1, 1, 1) !== "string") {
-  throw new Test262Error('#5: typeof Date(1970, 1, 1, 1) should be "string", actual is ' + (typeof Date(1970, 1, 1, 1)));
-}
+assert.sameValue(
+  typeof Date(1970, 1, 1, 1, 0, 0),
+  "string",
+  'The value of `typeof Date(1970, 1, 1, 1, 0, 0)` is expected to be "string"'
+);
 
-//CHECK#6
-if (typeof Date(1970, 1, 1, 1) !== "string") {
-  throw new Test262Error('#7: typeof Date(1970, 1, 1, 1) should be "string", actual is ' + (typeof Date(1970, 1, 1, 1)));
-}
+assert.sameValue(
+  typeof Date(1970, 1, 1, 1, 0, 0, 0),
+  "string",
+  'The value of `typeof Date(1970, 1, 1, 1, 0, 0, 0)` is expected to be "string"'
+);
 
-//CHECK#8
-if (typeof Date(1970, 1, 1, 1, 0) !== "string") {
-  throw new Test262Error('#8: typeof Date(1970, 1, 1, 1, 0) should be "string", actual is ' + (typeof Date(1970, 1, 1, 1, 0)));
-}
+assert.sameValue(
+  typeof Date(Number.NaN),
+  "string",
+  'The value of `typeof Date(Number.NaN)` is expected to be "string"'
+);
 
-//CHECK#9
-if (typeof Date(1970, 1, 1, 1, 0, 0) !== "string") {
-  throw new Test262Error('#9: typeof Date(1970, 1, 1, 1, 0, 0) should be "string", actual is ' + (typeof Date(1970, 1, 1, 1, 0, 0)));
-}
+assert.sameValue(
+  typeof Date(Number.POSITIVE_INFINITY),
+  "string",
+  'The value of `typeof Date(Number.POSITIVE_INFINITY)` is expected to be "string"'
+);
 
-//CHECK#10
-if (typeof Date(1970, 1, 1, 1, 0, 0, 0) !== "string") {
-  throw new Test262Error('#10: typeof Date(1970, 1, 1, 1, 0, 0, 0) should be "string", actual is ' + (typeof Date(1970, 1, 1, 1, 0, 0, 0)));
-}
+assert.sameValue(
+  typeof Date(Number.NEGATIVE_INFINITY),
+  "string",
+  'The value of `typeof Date(Number.NEGATIVE_INFINITY)` is expected to be "string"'
+);
 
-//CHECK#11
-if (typeof Date(Number.NaN) !== "string") {
-  throw new Test262Error('#11: typeof Date(Number.NaN) should be "string", actual is ' + (typeof Date(Number.NaN)));
-}
-
-//CHECK#12
-if (typeof Date(Number.POSITIVE_INFINITY) !== "string") {
-  throw new Test262Error('#12: typeof Date(Number.POSITIVE_INFINITY) should be "string", actual is ' + (typeof Date(Number.POSITIVE_INFINITY)));
-}
-
-//CHECK#13
-if (typeof Date(Number.NEGATIVE_INFINITY) !== "string") {
-  throw new Test262Error('#13: typeof Date(Number.NEGATIVE_INFINITY) should be "string", actual is ' + (typeof Date(Number.NEGATIVE_INFINITY)));
-}
-
-//CHECK#14
-if (typeof Date(undefined) !== "string") {
-  throw new Test262Error('#14: typeof Date(undefined) should be "string", actual is ' + (typeof Date(undefined)));
-}
-
-//CHECK#15
-if (typeof Date(null) !== "string") {
-  throw new Test262Error('#15: typeof Date(null) should be "string", actual is ' + (typeof Date(null)));
-}
+assert.sameValue(typeof Date(undefined), "string", 'The value of `typeof Date(undefined)` is expected to be "string"');
+assert.sameValue(typeof Date(null), "string", 'The value of `typeof Date(null)` is expected to be "string"');

test/built-ins/Date/S15.9.2.1_A2.js

@@ -21,72 +21,72 @@ function isEqual(d1, d2) {
   }
 }
 
-//CHECK#1
-if (!isEqual(Date(), (new Date()).toString())) {
-  throw new Test262Error('#1: Date() is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(), (new Date()).toString()),
+  'isEqual(Date(), (new Date()).toString()) must return true'
+);
 
-//CHECK#2
-if (!isEqual(Date(1), (new Date()).toString())) {
-  throw new Test262Error('#2: Date(1) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(1), (new Date()).toString()),
+  'isEqual(Date(1), (new Date()).toString()) must return true'
+);
 
-//CHECK#3
-if (!isEqual(Date(1970, 1), (new Date()).toString())) {
-  throw new Test262Error('#3: Date(1970, 1) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(1970, 1), (new Date()).toString()),
+  'isEqual(Date(1970, 1), (new Date()).toString()) must return true'
+);
 
-//CHECK#4
-if (!isEqual(Date(1970, 1, 1), (new Date()).toString())) {
-  throw new Test262Error('#4: Date(1970, 1, 1) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(1970, 1, 1), (new Date()).toString()),
+  'isEqual(Date(1970, 1, 1), (new Date()).toString()) must return true'
+);
 
-//CHECK#5
-if (!isEqual(Date(1970, 1, 1, 1), (new Date()).toString())) {
-  throw new Test262Error('#5: Date(1970, 1, 1, 1) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(1970, 1, 1, 1), (new Date()).toString()),
+  'isEqual(Date(1970, 1, 1, 1), (new Date()).toString()) must return true'
+);
 
-//CHECK#6
-if (!isEqual(Date(1970, 1, 1, 1), (new Date()).toString())) {
-  throw new Test262Error('#7: Date(1970, 1, 1, 1) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(1970, 1, 1, 1), (new Date()).toString()),
+  'isEqual(Date(1970, 1, 1, 1), (new Date()).toString()) must return true'
+);
 
-//CHECK#8
-if (!isEqual(Date(1970, 1, 1, 1, 0), (new Date()).toString())) {
-  throw new Test262Error('#8: Date(1970, 1, 1, 1, 0) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(1970, 1, 1, 1, 0), (new Date()).toString()),
+  'isEqual(Date(1970, 1, 1, 1, 0), (new Date()).toString()) must return true'
+);
 
-//CHECK#9
-if (!isEqual(Date(1970, 1, 1, 1, 0, 0), (new Date()).toString())) {
-  throw new Test262Error('#9: Date(1970, 1, 1, 1, 0, 0) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(1970, 1, 1, 1, 0, 0), (new Date()).toString()),
+  'isEqual(Date(1970, 1, 1, 1, 0, 0), (new Date()).toString()) must return true'
+);
 
-//CHECK#10
-if (!isEqual(Date(1970, 1, 1, 1, 0, 0, 0), (new Date()).toString())) {
-  throw new Test262Error('#10: Date(1970, 1, 1, 1, 0, 0, 0) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(1970, 1, 1, 1, 0, 0, 0), (new Date()).toString()),
+  'isEqual(Date(1970, 1, 1, 1, 0, 0, 0), (new Date()).toString()) must return true'
+);
 
-//CHECK#11
-if (!isEqual(Date(Number.NaN), (new Date()).toString())) {
-  throw new Test262Error('#11: Date(Number.NaN) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(Number.NaN), (new Date()).toString()),
+  'isEqual(Date(Number.NaN), (new Date()).toString()) must return true'
+);
 
-//CHECK#12
-if (!isEqual(Date(Number.POSITIVE_INFINITY), (new Date()).toString())) {
-  throw new Test262Error('#12: Date(Number.POSITIVE_INFINITY) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(Number.POSITIVE_INFINITY), (new Date()).toString()),
+  'isEqual(Date(Number.POSITIVE_INFINITY), (new Date()).toString()) must return true'
+);
 
-//CHECK#13
-if (!isEqual(Date(Number.NEGATIVE_INFINITY), (new Date()).toString())) {
-  throw new Test262Error('#13: Date(Number.NEGATIVE_INFINITY) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(Number.NEGATIVE_INFINITY), (new Date()).toString()),
+  'isEqual(Date(Number.NEGATIVE_INFINITY), (new Date()).toString()) must return true'
+);
 
-//CHECK#14
-if (!isEqual(Date(undefined), (new Date()).toString())) {
-  throw new Test262Error('#14: Date(undefined) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(undefined), (new Date()).toString()),
+  'isEqual(Date(undefined), (new Date()).toString()) must return true'
+);
 
-//CHECK#15
-if (!isEqual(Date(null), (new Date()).toString())) {
-  throw new Test262Error('#15: Date(null) is equal to (new Date()).toString()');
-}
+assert(
+  isEqual(Date(null), (new Date()).toString()),
+  'isEqual(Date(null), (new Date()).toString()) must return true'
+);

test/built-ins/Date/S15.9.3.1_A1_T1.js

@@ -9,218 +9,170 @@ esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 2 arguments, (year, month)
 ---*/
 
-if (typeof new Date(1899, 11) !== "object") {
-  throw new Test262Error("#1.1: typeof new Date(1899, 11) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1899, 11),
+  "object",
+  'The value of `typeof new Date(1899, 11)` is expected to be "object"'
+);
 
-if (new Date(1899, 11) === undefined) {
-  throw new Test262Error("#1.2: new Date(1899, 11) should not be undefined");
-}
+assert.notSameValue(new Date(1899, 11), undefined, 'new Date(1899, 11) is expected to not equal ``undefined``');
 
 var x13 = new Date(1899, 11);
-if (typeof x13 !== "object") {
-  throw new Test262Error("#1.3: typeof new Date(1899, 11) should be 'object'");
-}
+assert.sameValue(typeof x13, "object", 'The value of `typeof x13` is expected to be "object"');
 
 var x14 = new Date(1899, 11);
-if (x14 === undefined) {
-  throw new Test262Error("#1.4: new Date(1899, 11) should not be undefined");
-}
+assert.notSameValue(x14, undefined, 'The value of x14 is expected to not equal ``undefined``');
 
-if (typeof new Date(1899, 12) !== "object") {
-  throw new Test262Error("#2.1: typeof new Date(1899, 12) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1899, 12),
+  "object",
+  'The value of `typeof new Date(1899, 12)` is expected to be "object"'
+);
 
-if (new Date(1899, 12) === undefined) {
-  throw new Test262Error("#2.2: new Date(1899, 12) should not be undefined");
-}
+assert.notSameValue(new Date(1899, 12), undefined, 'new Date(1899, 12) is expected to not equal ``undefined``');
 
 var x23 = new Date(1899, 12);
-if (typeof x23 !== "object") {
-  throw new Test262Error("#2.3: typeof new Date(1899, 12) should be 'object'");
-}
+assert.sameValue(typeof x23, "object", 'The value of `typeof x23` is expected to be "object"');
 
 var x24 = new Date(1899, 12);
-if (x24 === undefined) {
-  throw new Test262Error("#2.4: new Date(1899, 12) should not be undefined");
-}
+assert.notSameValue(x24, undefined, 'The value of x24 is expected to not equal ``undefined``');
 
-if (typeof new Date(1900, 0) !== "object") {
-  throw new Test262Error("#3.1: typeof new Date(1900, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1900, 0),
+  "object",
+  'The value of `typeof new Date(1900, 0)` is expected to be "object"'
+);
 
-if (new Date(1900, 0) === undefined) {
-  throw new Test262Error("#3.2: new Date(1900, 0) should not be undefined");
-}
+assert.notSameValue(new Date(1900, 0), undefined, 'new Date(1900, 0) is expected to not equal ``undefined``');
 
 var x33 = new Date(1900, 0);
-if (typeof x33 !== "object") {
-  throw new Test262Error("#3.3: typeof new Date(1900, 0) should be 'object'");
-}
+assert.sameValue(typeof x33, "object", 'The value of `typeof x33` is expected to be "object"');
 
 var x34 = new Date(1900, 0);
-if (x34 === undefined) {
-  throw new Test262Error("#3.4: new Date(1900, 0) should not be undefined");
-}
+assert.notSameValue(x34, undefined, 'The value of x34 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 11) !== "object") {
-  throw new Test262Error("#4.1: typeof new Date(1969, 11) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 11),
+  "object",
+  'The value of `typeof new Date(1969, 11)` is expected to be "object"'
+);
 
-if (new Date(1969, 11) === undefined) {
-  throw new Test262Error("#4.2: new Date(1969, 11) should not be undefined");
-}
+assert.notSameValue(new Date(1969, 11), undefined, 'new Date(1969, 11) is expected to not equal ``undefined``');
 
 var x43 = new Date(1969, 11);
-if (typeof x43 !== "object") {
-  throw new Test262Error("#4.3: typeof new Date(1969, 11) should be 'object'");
-}
+assert.sameValue(typeof x43, "object", 'The value of `typeof x43` is expected to be "object"');
 
 var x44 = new Date(1969, 11);
-if (x44 === undefined) {
-  throw new Test262Error("#4.4: new Date(1969, 11) should not be undefined");
-}
+assert.notSameValue(x44, undefined, 'The value of x44 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 12) !== "object") {
-  throw new Test262Error("#5.1: typeof new Date(1969, 12) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 12),
+  "object",
+  'The value of `typeof new Date(1969, 12)` is expected to be "object"'
+);
 
-if (new Date(1969, 12) === undefined) {
-  throw new Test262Error("#5.2: new Date(1969, 12) should not be undefined");
-}
+assert.notSameValue(new Date(1969, 12), undefined, 'new Date(1969, 12) is expected to not equal ``undefined``');
 
 var x53 = new Date(1969, 12);
-if (typeof x53 !== "object") {
-  throw new Test262Error("#5.3: typeof new Date(1969, 12) should be 'object'");
-}
+assert.sameValue(typeof x53, "object", 'The value of `typeof x53` is expected to be "object"');
 
 var x54 = new Date(1969, 12);
-if (x54 === undefined) {
-  throw new Test262Error("#5.4: new Date(1969, 12) should not be undefined");
-}
+assert.notSameValue(x54, undefined, 'The value of x54 is expected to not equal ``undefined``');
 
-if (typeof new Date(1970, 0) !== "object") {
-  throw new Test262Error("#6.1: typeof new Date(1970, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1970, 0),
+  "object",
+  'The value of `typeof new Date(1970, 0)` is expected to be "object"'
+);
 
-if (new Date(1970, 0) === undefined) {
-  throw new Test262Error("#6.2: new Date(1970, 0) should not be undefined");
-}
+assert.notSameValue(new Date(1970, 0), undefined, 'new Date(1970, 0) is expected to not equal ``undefined``');
 
 var x63 = new Date(1970, 0);
-if (typeof x63 !== "object") {
-  throw new Test262Error("#6.3: typeof new Date(1970, 0) should be 'object'");
-}
+assert.sameValue(typeof x63, "object", 'The value of `typeof x63` is expected to be "object"');
 
 var x64 = new Date(1970, 0);
-if (x64 === undefined) {
-  throw new Test262Error("#6.4: new Date(1970, 0) should not be undefined");
-}
+assert.notSameValue(x64, undefined, 'The value of x64 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 11) !== "object") {
-  throw new Test262Error("#7.1: typeof new Date(1999, 11) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 11),
+  "object",
+  'The value of `typeof new Date(1999, 11)` is expected to be "object"'
+);
 
-if (new Date(1999, 11) === undefined) {
-  throw new Test262Error("#7.2: new Date(1999, 11) should not be undefined");
-}
+assert.notSameValue(new Date(1999, 11), undefined, 'new Date(1999, 11) is expected to not equal ``undefined``');
 
 var x73 = new Date(1999, 11);
-if (typeof x73 !== "object") {
-  throw new Test262Error("#7.3: typeof new Date(1999, 11) should be 'object'");
-}
+assert.sameValue(typeof x73, "object", 'The value of `typeof x73` is expected to be "object"');
 
 var x74 = new Date(1999, 11);
-if (x74 === undefined) {
-  throw new Test262Error("#7.4: new Date(1999, 11) should not be undefined");
-}
+assert.notSameValue(x74, undefined, 'The value of x74 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 12) !== "object") {
-  throw new Test262Error("#8.1: typeof new Date(1999, 12) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 12),
+  "object",
+  'The value of `typeof new Date(1999, 12)` is expected to be "object"'
+);
 
-if (new Date(1999, 12) === undefined) {
-  throw new Test262Error("#8.2: new Date(1999, 12) should not be undefined");
-}
+assert.notSameValue(new Date(1999, 12), undefined, 'new Date(1999, 12) is expected to not equal ``undefined``');
 
 var x83 = new Date(1999, 12);
-if (typeof x83 !== "object") {
-  throw new Test262Error("#8.3: typeof new Date(1999, 12) should be 'object'");
-}
+assert.sameValue(typeof x83, "object", 'The value of `typeof x83` is expected to be "object"');
 
 var x84 = new Date(1999, 12);
-if (x84 === undefined) {
-  throw new Test262Error("#8.4: new Date(1999, 12) should not be undefined");
-}
+assert.notSameValue(x84, undefined, 'The value of x84 is expected to not equal ``undefined``');
 
-if (typeof new Date(2000, 0) !== "object") {
-  throw new Test262Error("#9.1: typeof new Date(2000, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2000, 0),
+  "object",
+  'The value of `typeof new Date(2000, 0)` is expected to be "object"'
+);
 
-if (new Date(2000, 0) === undefined) {
-  throw new Test262Error("#9.2: new Date(2000, 0) should not be undefined");
-}
+assert.notSameValue(new Date(2000, 0), undefined, 'new Date(2000, 0) is expected to not equal ``undefined``');
 
 var x93 = new Date(2000, 0);
-if (typeof x93 !== "object") {
-  throw new Test262Error("#9.3: typeof new Date(2000, 0) should be 'object'");
-}
+assert.sameValue(typeof x93, "object", 'The value of `typeof x93` is expected to be "object"');
 
 var x94 = new Date(2000, 0);
-if (x94 === undefined) {
-  throw new Test262Error("#9.4: new Date(2000, 0) should not be undefined");
-}
+assert.notSameValue(x94, undefined, 'The value of x94 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 11) !== "object") {
-  throw new Test262Error("#10.1: typeof new Date(2099, 11) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 11),
+  "object",
+  'The value of `typeof new Date(2099, 11)` is expected to be "object"'
+);
 
-if (new Date(2099, 11) === undefined) {
-  throw new Test262Error("#10.2: new Date(2099, 11) should not be undefined");
-}
+assert.notSameValue(new Date(2099, 11), undefined, 'new Date(2099, 11) is expected to not equal ``undefined``');
 
 var x103 = new Date(2099, 11);
-if (typeof x103 !== "object") {
-  throw new Test262Error("#10.3: typeof new Date(2099, 11) should be 'object'");
-}
+assert.sameValue(typeof x103, "object", 'The value of `typeof x103` is expected to be "object"');
 
 var x104 = new Date(2099, 11);
-if (x104 === undefined) {
-  throw new Test262Error("#10.4: new Date(2099, 11) should not be undefined");
-}
+assert.notSameValue(x104, undefined, 'The value of x104 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 12) !== "object") {
-  throw new Test262Error("#11.1: typeof new Date(2099, 12) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 12),
+  "object",
+  'The value of `typeof new Date(2099, 12)` is expected to be "object"'
+);
 
-if (new Date(2099, 12) === undefined) {
-  throw new Test262Error("#11.2: new Date(2099, 12) should not be undefined");
-}
+assert.notSameValue(new Date(2099, 12), undefined, 'new Date(2099, 12) is expected to not equal ``undefined``');
 
 var x113 = new Date(2099, 12);
-if (typeof x113 !== "object") {
-  throw new Test262Error("#11.3: typeof new Date(2099, 12) should be 'object'");
-}
+assert.sameValue(typeof x113, "object", 'The value of `typeof x113` is expected to be "object"');
 
 var x114 = new Date(2099, 12);
-if (x114 === undefined) {
-  throw new Test262Error("#11.4: new Date(2099, 12) should not be undefined");
-}
+assert.notSameValue(x114, undefined, 'The value of x114 is expected to not equal ``undefined``');
 
-if (typeof new Date(2100, 0) !== "object") {
-  throw new Test262Error("#12.1: typeof new Date(2100, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2100, 0),
+  "object",
+  'The value of `typeof new Date(2100, 0)` is expected to be "object"'
+);
 
-if (new Date(2100, 0) === undefined) {
-  throw new Test262Error("#12.2: new Date(2100, 0) should not be undefined");
-}
+assert.notSameValue(new Date(2100, 0), undefined, 'new Date(2100, 0) is expected to not equal ``undefined``');
 
 var x123 = new Date(2100, 0);
-if (typeof x123 !== "object") {
-  throw new Test262Error("#12.3: typeof new Date(2100, 0) should be 'object'");
-}
+assert.sameValue(typeof x123, "object", 'The value of `typeof x123` is expected to be "object"');
 
 var x124 = new Date(2100, 0);
-if (x124 === undefined) {
-  throw new Test262Error("#12.4: new Date(2100, 0) should not be undefined");
-}
+assert.notSameValue(x124, undefined, 'The value of x124 is expected to not equal ``undefined``');

test/built-ins/Date/S15.9.3.1_A1_T2.js

@@ -9,218 +9,170 @@ esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 3 arguments, (year, month, date)
 ---*/
 
-if (typeof new Date(1899, 11, 31) !== "object") {
-  throw new Test262Error("#1.1: typeof new Date(1899, 11, 31) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1899, 11, 31),
+  "object",
+  'The value of `typeof new Date(1899, 11, 31)` is expected to be "object"'
+);
 
-if (new Date(1899, 11, 31) === undefined) {
-  throw new Test262Error("#1.2: new Date(1899, 11, 31) should not be undefined");
-}
+assert.notSameValue(new Date(1899, 11, 31), undefined, 'new Date(1899, 11, 31) is expected to not equal ``undefined``');
 
 var x13 = new Date(1899, 11, 31);
-if (typeof x13 !== "object") {
-  throw new Test262Error("#1.3: typeof new Date(1899, 11, 31) should be 'object'");
-}
+assert.sameValue(typeof x13, "object", 'The value of `typeof x13` is expected to be "object"');
 
 var x14 = new Date(1899, 11, 31);
-if (x14 === undefined) {
-  throw new Test262Error("#1.4: new Date(1899, 11, 31) should not be undefined");
-}
+assert.notSameValue(x14, undefined, 'The value of x14 is expected to not equal ``undefined``');
 
-if (typeof new Date(1899, 12, 1) !== "object") {
-  throw new Test262Error("#2.1: typeof new Date(1899, 12, 1) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1899, 12, 1),
+  "object",
+  'The value of `typeof new Date(1899, 12, 1)` is expected to be "object"'
+);
 
-if (new Date(1899, 12, 1) === undefined) {
-  throw new Test262Error("#2.2: new Date(1899, 12, 1) should not be undefined");
-}
+assert.notSameValue(new Date(1899, 12, 1), undefined, 'new Date(1899, 12, 1) is expected to not equal ``undefined``');
 
 var x23 = new Date(1899, 12, 1);
-if (typeof x23 !== "object") {
-  throw new Test262Error("#2.3: typeof new Date(1899, 12, 1) should be 'object'");
-}
+assert.sameValue(typeof x23, "object", 'The value of `typeof x23` is expected to be "object"');
 
 var x24 = new Date(1899, 12, 1);
-if (x24 === undefined) {
-  throw new Test262Error("#2.4: new Date(1899, 12, 1) should not be undefined");
-}
+assert.notSameValue(x24, undefined, 'The value of x24 is expected to not equal ``undefined``');
 
-if (typeof new Date(1900, 0, 1) !== "object") {
-  throw new Test262Error("#3.1: typeof new Date(1900, 0, 1) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1900, 0, 1),
+  "object",
+  'The value of `typeof new Date(1900, 0, 1)` is expected to be "object"'
+);
 
-if (new Date(1900, 0, 1) === undefined) {
-  throw new Test262Error("#3.2: new Date(1900, 0, 1) should not be undefined");
-}
+assert.notSameValue(new Date(1900, 0, 1), undefined, 'new Date(1900, 0, 1) is expected to not equal ``undefined``');
 
 var x33 = new Date(1900, 0, 1);
-if (typeof x33 !== "object") {
-  throw new Test262Error("#3.3: typeof new Date(1900, 0, 1) should be 'object'");
-}
+assert.sameValue(typeof x33, "object", 'The value of `typeof x33` is expected to be "object"');
 
 var x34 = new Date(1900, 0, 1);
-if (x34 === undefined) {
-  throw new Test262Error("#3.4: new Date(1900, 0, 1) should not be undefined");
-}
+assert.notSameValue(x34, undefined, 'The value of x34 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 11, 31) !== "object") {
-  throw new Test262Error("#4.1: typeof new Date(1969, 11, 31) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 11, 31),
+  "object",
+  'The value of `typeof new Date(1969, 11, 31)` is expected to be "object"'
+);
 
-if (new Date(1969, 11, 31) === undefined) {
-  throw new Test262Error("#4.2: new Date(1969, 11, 31) should not be undefined");
-}
+assert.notSameValue(new Date(1969, 11, 31), undefined, 'new Date(1969, 11, 31) is expected to not equal ``undefined``');
 
 var x43 = new Date(1969, 11, 31);
-if (typeof x43 !== "object") {
-  throw new Test262Error("#4.3: typeof new Date(1969, 11, 31) should be 'object'");
-}
+assert.sameValue(typeof x43, "object", 'The value of `typeof x43` is expected to be "object"');
 
 var x44 = new Date(1969, 11, 31);
-if (x44 === undefined) {
-  throw new Test262Error("#4.4: new Date(1969, 11, 31) should not be undefined");
-}
+assert.notSameValue(x44, undefined, 'The value of x44 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 12, 1) !== "object") {
-  throw new Test262Error("#5.1: typeof new Date(1969, 12, 1) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 12, 1),
+  "object",
+  'The value of `typeof new Date(1969, 12, 1)` is expected to be "object"'
+);
 
-if (new Date(1969, 12, 1) === undefined) {
-  throw new Test262Error("#5.2: new Date(1969, 12, 1) should not be undefined");
-}
+assert.notSameValue(new Date(1969, 12, 1), undefined, 'new Date(1969, 12, 1) is expected to not equal ``undefined``');
 
 var x53 = new Date(1969, 12, 1);
-if (typeof x53 !== "object") {
-  throw new Test262Error("#5.3: typeof new Date(1969, 12, 1) should be 'object'");
-}
+assert.sameValue(typeof x53, "object", 'The value of `typeof x53` is expected to be "object"');
 
 var x54 = new Date(1969, 12, 1);
-if (x54 === undefined) {
-  throw new Test262Error("#5.4: new Date(1969, 12, 1) should not be undefined");
-}
+assert.notSameValue(x54, undefined, 'The value of x54 is expected to not equal ``undefined``');
 
-if (typeof new Date(1970, 0, 1) !== "object") {
-  throw new Test262Error("#6.1: typeof new Date(1970, 0, 1) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1970, 0, 1),
+  "object",
+  'The value of `typeof new Date(1970, 0, 1)` is expected to be "object"'
+);
 
-if (new Date(1970, 0, 1) === undefined) {
-  throw new Test262Error("#6.2: new Date(1970, 0, 1) should not be undefined");
-}
+assert.notSameValue(new Date(1970, 0, 1), undefined, 'new Date(1970, 0, 1) is expected to not equal ``undefined``');
 
 var x63 = new Date(1970, 0, 1);
-if (typeof x63 !== "object") {
-  throw new Test262Error("#6.3: typeof new Date(1970, 0, 1) should be 'object'");
-}
+assert.sameValue(typeof x63, "object", 'The value of `typeof x63` is expected to be "object"');
 
 var x64 = new Date(1970, 0, 1);
-if (x64 === undefined) {
-  throw new Test262Error("#6.4: new Date(1970, 0, 1) should not be undefined");
-}
+assert.notSameValue(x64, undefined, 'The value of x64 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 11, 31) !== "object") {
-  throw new Test262Error("#7.1: typeof new Date(1999, 11, 31) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 11, 31),
+  "object",
+  'The value of `typeof new Date(1999, 11, 31)` is expected to be "object"'
+);
 
-if (new Date(1999, 11, 31) === undefined) {
-  throw new Test262Error("#7.2: new Date(1999, 11, 31) should not be undefined");
-}
+assert.notSameValue(new Date(1999, 11, 31), undefined, 'new Date(1999, 11, 31) is expected to not equal ``undefined``');
 
 var x73 = new Date(1999, 11, 31);
-if (typeof x73 !== "object") {
-  throw new Test262Error("#7.3: typeof new Date(1999, 11, 31) should be 'object'");
-}
+assert.sameValue(typeof x73, "object", 'The value of `typeof x73` is expected to be "object"');
 
 var x74 = new Date(1999, 11, 31);
-if (x74 === undefined) {
-  throw new Test262Error("#7.4: new Date(1999, 11, 31) should not be undefined");
-}
+assert.notSameValue(x74, undefined, 'The value of x74 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 12, 1) !== "object") {
-  throw new Test262Error("#8.1: typeof new Date(1999, 12, 1) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 12, 1),
+  "object",
+  'The value of `typeof new Date(1999, 12, 1)` is expected to be "object"'
+);
 
-if (new Date(1999, 12, 1) === undefined) {
-  throw new Test262Error("#8.2: new Date(1999, 12, 1) should not be undefined");
-}
+assert.notSameValue(new Date(1999, 12, 1), undefined, 'new Date(1999, 12, 1) is expected to not equal ``undefined``');
 
 var x83 = new Date(1999, 12, 1);
-if (typeof x83 !== "object") {
-  throw new Test262Error("#8.3: typeof new Date(1999, 12, 1) should be 'object'");
-}
+assert.sameValue(typeof x83, "object", 'The value of `typeof x83` is expected to be "object"');
 
 var x84 = new Date(1999, 12, 1);
-if (x84 === undefined) {
-  throw new Test262Error("#8.4: new Date(1999, 12, 1) should not be undefined");
-}
+assert.notSameValue(x84, undefined, 'The value of x84 is expected to not equal ``undefined``');
 
-if (typeof new Date(2000, 0, 1) !== "object") {
-  throw new Test262Error("#9.1: typeof new Date(2000, 0, 1) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2000, 0, 1),
+  "object",
+  'The value of `typeof new Date(2000, 0, 1)` is expected to be "object"'
+);
 
-if (new Date(2000, 0, 1) === undefined) {
-  throw new Test262Error("#9.2: new Date(2000, 0, 1) should not be undefined");
-}
+assert.notSameValue(new Date(2000, 0, 1), undefined, 'new Date(2000, 0, 1) is expected to not equal ``undefined``');
 
 var x93 = new Date(2000, 0, 1);
-if (typeof x93 !== "object") {
-  throw new Test262Error("#9.3: typeof new Date(2000, 0, 1) should be 'object'");
-}
+assert.sameValue(typeof x93, "object", 'The value of `typeof x93` is expected to be "object"');
 
 var x94 = new Date(2000, 0, 1);
-if (x94 === undefined) {
-  throw new Test262Error("#9.4: new Date(2000, 0, 1) should not be undefined");
-}
+assert.notSameValue(x94, undefined, 'The value of x94 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 11, 31) !== "object") {
-  throw new Test262Error("#10.1: typeof new Date(2099, 11, 31) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 11, 31),
+  "object",
+  'The value of `typeof new Date(2099, 11, 31)` is expected to be "object"'
+);
 
-if (new Date(2099, 11, 31) === undefined) {
-  throw new Test262Error("#10.2: new Date(2099, 11, 31) should not be undefined");
-}
+assert.notSameValue(new Date(2099, 11, 31), undefined, 'new Date(2099, 11, 31) is expected to not equal ``undefined``');
 
 var x103 = new Date(2099, 11, 31);
-if (typeof x103 !== "object") {
-  throw new Test262Error("#10.3: typeof new Date(2099, 11, 31) should be 'object'");
-}
+assert.sameValue(typeof x103, "object", 'The value of `typeof x103` is expected to be "object"');
 
 var x104 = new Date(2099, 11, 31);
-if (x104 === undefined) {
-  throw new Test262Error("#10.4: new Date(2099, 11, 31) should not be undefined");
-}
+assert.notSameValue(x104, undefined, 'The value of x104 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 12, 1) !== "object") {
-  throw new Test262Error("#11.1: typeof new Date(2099, 12, 1) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 12, 1),
+  "object",
+  'The value of `typeof new Date(2099, 12, 1)` is expected to be "object"'
+);
 
-if (new Date(2099, 12, 1) === undefined) {
-  throw new Test262Error("#11.2: new Date(2099, 12, 1) should not be undefined");
-}
+assert.notSameValue(new Date(2099, 12, 1), undefined, 'new Date(2099, 12, 1) is expected to not equal ``undefined``');
 
 var x113 = new Date(2099, 12, 1);
-if (typeof x113 !== "object") {
-  throw new Test262Error("#11.3: typeof new Date(2099, 12, 1) should be 'object'");
-}
+assert.sameValue(typeof x113, "object", 'The value of `typeof x113` is expected to be "object"');
 
 var x114 = new Date(2099, 12, 1);
-if (x114 === undefined) {
-  throw new Test262Error("#11.4: new Date(2099, 12, 1) should not be undefined");
-}
+assert.notSameValue(x114, undefined, 'The value of x114 is expected to not equal ``undefined``');
 
-if (typeof new Date(2100, 0, 1) !== "object") {
-  throw new Test262Error("#12.1: typeof new Date(2100, 0, 1) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2100, 0, 1),
+  "object",
+  'The value of `typeof new Date(2100, 0, 1)` is expected to be "object"'
+);
 
-if (new Date(2100, 0, 1) === undefined) {
-  throw new Test262Error("#12.2: new Date(2100, 0, 1) should not be undefined");
-}
+assert.notSameValue(new Date(2100, 0, 1), undefined, 'new Date(2100, 0, 1) is expected to not equal ``undefined``');
 
 var x123 = new Date(2100, 0, 1);
-if (typeof x123 !== "object") {
-  throw new Test262Error("#12.3: typeof new Date(2100, 0, 1) should be 'object'");
-}
+assert.sameValue(typeof x123, "object", 'The value of `typeof x123` is expected to be "object"');
 
 var x124 = new Date(2100, 0, 1);
-if (x124 === undefined) {
-  throw new Test262Error("#12.4: new Date(2100, 0, 1) should not be undefined");
-}
+assert.notSameValue(x124, undefined, 'The value of x124 is expected to not equal ``undefined``');

test/built-ins/Date/S15.9.3.1_A1_T3.js

@@ -8,219 +8,202 @@ info: |
 esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 4 arguments, (year, month, date, hours)
 ---*/
+assert.sameValue(
+  typeof new Date(1899, 11, 31, 23),
+  "object",
+  'The value of `typeof new Date(1899, 11, 31, 23)` is expected to be "object"'
+);
 
-if (typeof new Date(1899, 11, 31, 23) !== "object") {
-  throw new Test262Error("#1.1: typeof new Date(1899, 11, 31, 23) should be 'object'");
-}
-
-if (new Date(1899, 11, 31, 23) === undefined) {
-  throw new Test262Error("#1.2: new Date(1899, 11, 31, 23) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1899, 11, 31, 23),
+  undefined,
+  'new Date(1899, 11, 31, 23) is expected to not equal ``undefined``'
+);
 
 var x13 = new Date(1899, 11, 31, 23);
-if (typeof x13 !== "object") {
-  throw new Test262Error("#1.3: typeof new Date(1899, 11, 31, 23) should be 'object'");
-}
+assert.sameValue(typeof x13, "object", 'The value of `typeof x13` is expected to be "object"');
 
 var x14 = new Date(1899, 11, 31, 23);
-if (x14 === undefined) {
-  throw new Test262Error("#1.4: new Date(1899, 11, 31, 23) should not be undefined");
-}
+assert.notSameValue(x14, undefined, 'The value of x14 is expected to not equal ``undefined``');
 
-if (typeof new Date(1899, 12, 1, 0) !== "object") {
-  throw new Test262Error("#2.1: typeof new Date(1899, 12, 1, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1899, 12, 1, 0),
+  "object",
+  'The value of `typeof new Date(1899, 12, 1, 0)` is expected to be "object"'
+);
 
-if (new Date(1899, 12, 1, 0) === undefined) {
-  throw new Test262Error("#2.2: new Date(1899, 12, 1, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1899, 12, 1, 0),
+  undefined,
+  'new Date(1899, 12, 1, 0) is expected to not equal ``undefined``'
+);
 
 var x23 = new Date(1899, 12, 1, 0);
-if (typeof x23 !== "object") {
-  throw new Test262Error("#2.3: typeof new Date(1899, 12, 1, 0) should be 'object'");
-}
+assert.sameValue(typeof x23, "object", 'The value of `typeof x23` is expected to be "object"');
 
 var x24 = new Date(1899, 12, 1, 0);
-if (x24 === undefined) {
-  throw new Test262Error("#2.4: new Date(1899, 12, 1, 0) should not be undefined");
-}
+assert.notSameValue(x24, undefined, 'The value of x24 is expected to not equal ``undefined``');
 
-if (typeof new Date(1900, 0, 1, 0) !== "object") {
-  throw new Test262Error("#3.1: typeof new Date(1900, 0, 1, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1900, 0, 1, 0),
+  "object",
+  'The value of `typeof new Date(1900, 0, 1, 0)` is expected to be "object"'
+);
 
-if (new Date(1900, 0, 1, 0) === undefined) {
-  throw new Test262Error("#3.2: new Date(1900, 0, 1, 0) should not be undefined");
-}
+assert.notSameValue(new Date(1900, 0, 1, 0), undefined, 'new Date(1900, 0, 1, 0) is expected to not equal ``undefined``');
 
 var x33 = new Date(1900, 0, 1, 0);
-if (typeof x33 !== "object") {
-  throw new Test262Error("#3.3: typeof new Date(1900, 0, 1, 0) should be 'object'");
-}
+assert.sameValue(typeof x33, "object", 'The value of `typeof x33` is expected to be "object"');
 
 var x34 = new Date(1900, 0, 1, 0);
-if (x34 === undefined) {
-  throw new Test262Error("#3.4: new Date(1900, 0, 1, 0) should not be undefined");
-}
+assert.notSameValue(x34, undefined, 'The value of x34 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 11, 31, 23) !== "object") {
-  throw new Test262Error("#4.1: typeof new Date(1969, 11, 31, 23) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 11, 31, 23),
+  "object",
+  'The value of `typeof new Date(1969, 11, 31, 23)` is expected to be "object"'
+);
 
-if (new Date(1969, 11, 31, 23) === undefined) {
-  throw new Test262Error("#4.2: new Date(1969, 11, 31, 23) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1969, 11, 31, 23),
+  undefined,
+  'new Date(1969, 11, 31, 23) is expected to not equal ``undefined``'
+);
 
 var x43 = new Date(1969, 11, 31, 23);
-if (typeof x43 !== "object") {
-  throw new Test262Error("#4.3: typeof new Date(1969, 11, 31, 23) should be 'object'");
-}
+assert.sameValue(typeof x43, "object", 'The value of `typeof x43` is expected to be "object"');
 
 var x44 = new Date(1969, 11, 31, 23);
-if (x44 === undefined) {
-  throw new Test262Error("#4.4: new Date(1969, 11, 31, 23) should not be undefined");
-}
+assert.notSameValue(x44, undefined, 'The value of x44 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 12, 1, 0) !== "object") {
-  throw new Test262Error("#5.1: typeof new Date(1969, 12, 1, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 12, 1, 0),
+  "object",
+  'The value of `typeof new Date(1969, 12, 1, 0)` is expected to be "object"'
+);
 
-if (new Date(1969, 12, 1, 0) === undefined) {
-  throw new Test262Error("#5.2: new Date(1969, 12, 1, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1969, 12, 1, 0),
+  undefined,
+  'new Date(1969, 12, 1, 0) is expected to not equal ``undefined``'
+);
 
 var x53 = new Date(1969, 12, 1, 0);
-if (typeof x53 !== "object") {
-  throw new Test262Error("#5.3: typeof new Date(1969, 12, 1, 0) should be 'object'");
-}
+assert.sameValue(typeof x53, "object", 'The value of `typeof x53` is expected to be "object"');
 
 var x54 = new Date(1969, 12, 1, 0);
-if (x54 === undefined) {
-  throw new Test262Error("#5.4: new Date(1969, 12, 1, 0) should not be undefined");
-}
+assert.notSameValue(x54, undefined, 'The value of x54 is expected to not equal ``undefined``');
 
-if (typeof new Date(1970, 0, 1, 0) !== "object") {
-  throw new Test262Error("#6.1: typeof new Date(1970, 0, 1, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1970, 0, 1, 0),
+  "object",
+  'The value of `typeof new Date(1970, 0, 1, 0)` is expected to be "object"'
+);
 
-if (new Date(1970, 0, 1, 0) === undefined) {
-  throw new Test262Error("#6.2: new Date(1970, 0, 1, 0) should not be undefined");
-}
+assert.notSameValue(new Date(1970, 0, 1, 0), undefined, 'new Date(1970, 0, 1, 0) is expected to not equal ``undefined``');
 
 var x63 = new Date(1970, 0, 1, 0);
-if (typeof x63 !== "object") {
-  throw new Test262Error("#6.3: typeof new Date(1970, 0, 1, 0) should be 'object'");
-}
+assert.sameValue(typeof x63, "object", 'The value of `typeof x63` is expected to be "object"');
 
 var x64 = new Date(1970, 0, 1, 0);
-if (x64 === undefined) {
-  throw new Test262Error("#6.4: new Date(1970, 0, 1, 0) should not be undefined");
-}
+assert.notSameValue(x64, undefined, 'The value of x64 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 11, 31, 23) !== "object") {
-  throw new Test262Error("#7.1: typeof new Date(1999, 11, 31, 23) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 11, 31, 23),
+  "object",
+  'The value of `typeof new Date(1999, 11, 31, 23)` is expected to be "object"'
+);
 
-if (new Date(1999, 11, 31, 23) === undefined) {
-  throw new Test262Error("#7.2: new Date(1999, 11, 31, 23) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1999, 11, 31, 23),
+  undefined,
+  'new Date(1999, 11, 31, 23) is expected to not equal ``undefined``'
+);
 
 var x73 = new Date(1999, 11, 31, 23);
-if (typeof x73 !== "object") {
-  throw new Test262Error("#7.3: typeof new Date(1999, 11, 31, 23) should be 'object'");
-}
+assert.sameValue(typeof x73, "object", 'The value of `typeof x73` is expected to be "object"');
 
 var x74 = new Date(1999, 11, 31, 23);
-if (x74 === undefined) {
-  throw new Test262Error("#7.4: new Date(1999, 11, 31, 23) should not be undefined");
-}
+assert.notSameValue(x74, undefined, 'The value of x74 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 12, 1, 0) !== "object") {
-  throw new Test262Error("#8.1: typeof new Date(1999, 12, 1, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 12, 1, 0),
+  "object",
+  'The value of `typeof new Date(1999, 12, 1, 0)` is expected to be "object"'
+);
 
-if (new Date(1999, 12, 1, 0) === undefined) {
-  throw new Test262Error("#8.2: new Date(1999, 12, 1, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1999, 12, 1, 0),
+  undefined,
+  'new Date(1999, 12, 1, 0) is expected to not equal ``undefined``'
+);
 
 var x83 = new Date(1999, 12, 1, 0);
-if (typeof x83 !== "object") {
-  throw new Test262Error("#8.3: typeof new Date(1999, 12, 1, 0) should be 'object'");
-}
+assert.sameValue(typeof x83, "object", 'The value of `typeof x83` is expected to be "object"');
 
 var x84 = new Date(1999, 12, 1, 0);
-if (x84 === undefined) {
-  throw new Test262Error("#8.4: new Date(1999, 12, 1, 0) should not be undefined");
-}
+assert.notSameValue(x84, undefined, 'The value of x84 is expected to not equal ``undefined``');
 
-if (typeof new Date(2000, 0, 1, 0) !== "object") {
-  throw new Test262Error("#9.1: typeof new Date(2000, 0, 1, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2000, 0, 1, 0),
+  "object",
+  'The value of `typeof new Date(2000, 0, 1, 0)` is expected to be "object"'
+);
 
-if (new Date(2000, 0, 1, 0) === undefined) {
-  throw new Test262Error("#9.2: new Date(2000, 0, 1, 0) should not be undefined");
-}
+assert.notSameValue(new Date(2000, 0, 1, 0), undefined, 'new Date(2000, 0, 1, 0) is expected to not equal ``undefined``');
 
 var x93 = new Date(2000, 0, 1, 0);
-if (typeof x93 !== "object") {
-  throw new Test262Error("#9.3: typeof new Date(2000, 0, 1, 0) should be 'object'");
-}
+assert.sameValue(typeof x93, "object", 'The value of `typeof x93` is expected to be "object"');
 
 var x94 = new Date(2000, 0, 1, 0);
-if (x94 === undefined) {
-  throw new Test262Error("#9.4: new Date(2000, 0, 1, 0) should not be undefined");
-}
+assert.notSameValue(x94, undefined, 'The value of x94 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 11, 31, 23) !== "object") {
-  throw new Test262Error("#10.1: typeof new Date(2099, 11, 31, 23) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 11, 31, 23),
+  "object",
+  'The value of `typeof new Date(2099, 11, 31, 23)` is expected to be "object"'
+);
 
-if (new Date(2099, 11, 31, 23) === undefined) {
-  throw new Test262Error("#10.2: new Date(2099, 11, 31, 23) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2099, 11, 31, 23),
+  undefined,
+  'new Date(2099, 11, 31, 23) is expected to not equal ``undefined``'
+);
 
 var x103 = new Date(2099, 11, 31, 23);
-if (typeof x103 !== "object") {
-  throw new Test262Error("#10.3: typeof new Date(2099, 11, 31, 23) should be 'object'");
-}
+assert.sameValue(typeof x103, "object", 'The value of `typeof x103` is expected to be "object"');
 
 var x104 = new Date(2099, 11, 31, 23);
-if (x104 === undefined) {
-  throw new Test262Error("#10.4: new Date(2099, 11, 31, 23) should not be undefined");
-}
+assert.notSameValue(x104, undefined, 'The value of x104 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 12, 1, 0) !== "object") {
-  throw new Test262Error("#11.1: typeof new Date(2099, 12, 1, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 12, 1, 0),
+  "object",
+  'The value of `typeof new Date(2099, 12, 1, 0)` is expected to be "object"'
+);
 
-if (new Date(2099, 12, 1, 0) === undefined) {
-  throw new Test262Error("#11.2: new Date(2099, 12, 1, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2099, 12, 1, 0),
+  undefined,
+  'new Date(2099, 12, 1, 0) is expected to not equal ``undefined``'
+);
 
 var x113 = new Date(2099, 12, 1, 0);
-if (typeof x113 !== "object") {
-  throw new Test262Error("#11.3: typeof new Date(2099, 12, 1, 0) should be 'object'");
-}
+assert.sameValue(typeof x113, "object", 'The value of `typeof x113` is expected to be "object"');
 
 var x114 = new Date(2099, 12, 1, 0);
-if (x114 === undefined) {
-  throw new Test262Error("#11.4: new Date(2099, 12, 1, 0) should not be undefined");
-}
+assert.notSameValue(x114, undefined, 'The value of x114 is expected to not equal ``undefined``');
 
-if (typeof new Date(2100, 0, 1, 0) !== "object") {
-  throw new Test262Error("#12.1: typeof new Date(2100, 0, 1, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2100, 0, 1, 0),
+  "object",
+  'The value of `typeof new Date(2100, 0, 1, 0)` is expected to be "object"'
+);
 
-if (new Date(2100, 0, 1, 0) === undefined) {
-  throw new Test262Error("#12.2: new Date(2100, 0, 1, 0) should not be undefined");
-}
+assert.notSameValue(new Date(2100, 0, 1, 0), undefined, 'new Date(2100, 0, 1, 0) is expected to not equal ``undefined``');
 
 var x123 = new Date(2100, 0, 1, 0);
-if (typeof x123 !== "object") {
-  throw new Test262Error("#12.3: typeof new Date(2100, 0, 1, 0) should be 'object'");
-}
+assert.sameValue(typeof x123, "object", 'The value of `typeof x123` is expected to be "object"');
 
 var x124 = new Date(2100, 0, 1, 0);
-if (x124 === undefined) {
-  throw new Test262Error("#12.4: new Date(2100, 0, 1, 0) should not be undefined");
-}
+assert.notSameValue(x124, undefined, 'The value of x124 is expected to not equal ``undefined``');

test/built-ins/Date/S15.9.3.1_A1_T4.js

@@ -8,219 +8,218 @@ info: |
 esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 5 arguments, (year, month, date, hours, minutes)
 ---*/
+assert.sameValue(
+  typeof new Date(1899, 11, 31, 23, 59),
+  "object",
+  'The value of `typeof new Date(1899, 11, 31, 23, 59)` is expected to be "object"'
+);
 
-if (typeof new Date(1899, 11, 31, 23, 59) !== "object") {
-  throw new Test262Error("#1.1: typeof new Date(1899, 11, 31, 23, 59) should be 'object'");
-}
-
-if (new Date(1899, 11, 31, 23, 59) === undefined) {
-  throw new Test262Error("#1.2: new Date(1899, 11, 31, 23, 59) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1899, 11, 31, 23, 59),
+  undefined,
+  'new Date(1899, 11, 31, 23, 59) is expected to not equal ``undefined``'
+);
 
 var x13 = new Date(1899, 11, 31, 23, 59);
-if (typeof x13 !== "object") {
-  throw new Test262Error("#1.3: typeof new Date(1899, 11, 31, 23, 59) should be 'object'");
-}
+assert.sameValue(typeof x13, "object", 'The value of `typeof x13` is expected to be "object"');
 
 var x14 = new Date(1899, 11, 31, 23, 59);
-if (x14 === undefined) {
-  throw new Test262Error("#1.4: new Date(1899, 11, 31, 23, 59) should not be undefined");
-}
+assert.notSameValue(x14, undefined, 'The value of x14 is expected to not equal ``undefined``');
 
-if (typeof new Date(1899, 12, 1, 0, 0) !== "object") {
-  throw new Test262Error("#2.1: typeof new Date(1899, 12, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1899, 12, 1, 0, 0),
+  "object",
+  'The value of `typeof new Date(1899, 12, 1, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1899, 12, 1, 0, 0) === undefined) {
-  throw new Test262Error("#2.2: new Date(1899, 12, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1899, 12, 1, 0, 0),
+  undefined,
+  'new Date(1899, 12, 1, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x23 = new Date(1899, 12, 1, 0, 0);
-if (typeof x23 !== "object") {
-  throw new Test262Error("#2.3: typeof new Date(1899, 12, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x23, "object", 'The value of `typeof x23` is expected to be "object"');
 
 var x24 = new Date(1899, 12, 1, 0, 0);
-if (x24 === undefined) {
-  throw new Test262Error("#2.4: new Date(1899, 12, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(x24, undefined, 'The value of x24 is expected to not equal ``undefined``');
 
-if (typeof new Date(1900, 0, 1, 0, 0) !== "object") {
-  throw new Test262Error("#3.1: typeof new Date(1900, 0, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1900, 0, 1, 0, 0),
+  "object",
+  'The value of `typeof new Date(1900, 0, 1, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1900, 0, 1, 0, 0) === undefined) {
-  throw new Test262Error("#3.2: new Date(1900, 0, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1900, 0, 1, 0, 0),
+  undefined,
+  'new Date(1900, 0, 1, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x33 = new Date(1900, 0, 1, 0, 0);
-if (typeof x33 !== "object") {
-  throw new Test262Error("#3.3: typeof new Date(1900, 0, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x33, "object", 'The value of `typeof x33` is expected to be "object"');
 
 var x34 = new Date(1900, 0, 1, 0, 0);
-if (x34 === undefined) {
-  throw new Test262Error("#3.4: new Date(1900, 0, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(x34, undefined, 'The value of x34 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 11, 31, 23, 59) !== "object") {
-  throw new Test262Error("#4.1: typeof new Date(1969, 11, 31, 23, 59) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 11, 31, 23, 59),
+  "object",
+  'The value of `typeof new Date(1969, 11, 31, 23, 59)` is expected to be "object"'
+);
 
-if (new Date(1969, 11, 31, 23, 59) === undefined) {
-  throw new Test262Error("#4.2: new Date(1969, 11, 31, 23, 59) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1969, 11, 31, 23, 59),
+  undefined,
+  'new Date(1969, 11, 31, 23, 59) is expected to not equal ``undefined``'
+);
 
 var x43 = new Date(1969, 11, 31, 23, 59);
-if (typeof x43 !== "object") {
-  throw new Test262Error("#4.3: typeof new Date(1969, 11, 31, 23, 59) should be 'object'");
-}
+assert.sameValue(typeof x43, "object", 'The value of `typeof x43` is expected to be "object"');
 
 var x44 = new Date(1969, 11, 31, 23, 59);
-if (x44 === undefined) {
-  throw new Test262Error("#4.4: new Date(1969, 11, 31, 23, 59) should not be undefined");
-}
+assert.notSameValue(x44, undefined, 'The value of x44 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 12, 1, 0, 0) !== "object") {
-  throw new Test262Error("#5.1: typeof new Date(1969, 12, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 12, 1, 0, 0),
+  "object",
+  'The value of `typeof new Date(1969, 12, 1, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1969, 12, 1, 0, 0) === undefined) {
-  throw new Test262Error("#5.2: new Date(1969, 12, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1969, 12, 1, 0, 0),
+  undefined,
+  'new Date(1969, 12, 1, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x53 = new Date(1969, 12, 1, 0, 0);
-if (typeof x53 !== "object") {
-  throw new Test262Error("#5.3: typeof new Date(1969, 12, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x53, "object", 'The value of `typeof x53` is expected to be "object"');
 
 var x54 = new Date(1969, 12, 1, 0, 0);
-if (x54 === undefined) {
-  throw new Test262Error("#5.4: new Date(1969, 12, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(x54, undefined, 'The value of x54 is expected to not equal ``undefined``');
 
-if (typeof new Date(1970, 0, 1, 0, 0) !== "object") {
-  throw new Test262Error("#6.1: typeof new Date(1970, 0, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1970, 0, 1, 0, 0),
+  "object",
+  'The value of `typeof new Date(1970, 0, 1, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1970, 0, 1, 0, 0) === undefined) {
-  throw new Test262Error("#6.2: new Date(1970, 0, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1970, 0, 1, 0, 0),
+  undefined,
+  'new Date(1970, 0, 1, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x63 = new Date(1970, 0, 1, 0, 0);
-if (typeof x63 !== "object") {
-  throw new Test262Error("#6.3: typeof new Date(1970, 0, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x63, "object", 'The value of `typeof x63` is expected to be "object"');
 
 var x64 = new Date(1970, 0, 1, 0, 0);
-if (x64 === undefined) {
-  throw new Test262Error("#6.4: new Date(1970, 0, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(x64, undefined, 'The value of x64 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 11, 31, 23, 59) !== "object") {
-  throw new Test262Error("#7.1: typeof new Date(1999, 11, 31, 23, 59) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 11, 31, 23, 59),
+  "object",
+  'The value of `typeof new Date(1999, 11, 31, 23, 59)` is expected to be "object"'
+);
 
-if (new Date(1999, 11, 31, 23, 59) === undefined) {
-  throw new Test262Error("#7.2: new Date(1999, 11, 31, 23, 59) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1999, 11, 31, 23, 59),
+  undefined,
+  'new Date(1999, 11, 31, 23, 59) is expected to not equal ``undefined``'
+);
 
 var x73 = new Date(1999, 11, 31, 23, 59);
-if (typeof x73 !== "object") {
-  throw new Test262Error("#7.3: typeof new Date(1999, 11, 31, 23, 59) should be 'object'");
-}
+assert.sameValue(typeof x73, "object", 'The value of `typeof x73` is expected to be "object"');
 
 var x74 = new Date(1999, 11, 31, 23, 59);
-if (x74 === undefined) {
-  throw new Test262Error("#7.4: new Date(1999, 11, 31, 23, 59) should not be undefined");
-}
+assert.notSameValue(x74, undefined, 'The value of x74 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 12, 1, 0, 0) !== "object") {
-  throw new Test262Error("#8.1: typeof new Date(1999, 12, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 12, 1, 0, 0),
+  "object",
+  'The value of `typeof new Date(1999, 12, 1, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1999, 12, 1, 0, 0) === undefined) {
-  throw new Test262Error("#8.2: new Date(1999, 12, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1999, 12, 1, 0, 0),
+  undefined,
+  'new Date(1999, 12, 1, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x83 = new Date(1999, 12, 1, 0, 0);
-if (typeof x83 !== "object") {
-  throw new Test262Error("#8.3: typeof new Date(1999, 12, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x83, "object", 'The value of `typeof x83` is expected to be "object"');
 
 var x84 = new Date(1999, 12, 1, 0, 0);
-if (x84 === undefined) {
-  throw new Test262Error("#8.4: new Date(1999, 12, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(x84, undefined, 'The value of x84 is expected to not equal ``undefined``');
 
-if (typeof new Date(2000, 0, 1, 0, 0) !== "object") {
-  throw new Test262Error("#9.1: typeof new Date(2000, 0, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2000, 0, 1, 0, 0),
+  "object",
+  'The value of `typeof new Date(2000, 0, 1, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2000, 0, 1, 0, 0) === undefined) {
-  throw new Test262Error("#9.2: new Date(2000, 0, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2000, 0, 1, 0, 0),
+  undefined,
+  'new Date(2000, 0, 1, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x93 = new Date(2000, 0, 1, 0, 0);
-if (typeof x93 !== "object") {
-  throw new Test262Error("#9.3: typeof new Date(2000, 0, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x93, "object", 'The value of `typeof x93` is expected to be "object"');
 
 var x94 = new Date(2000, 0, 1, 0, 0);
-if (x94 === undefined) {
-  throw new Test262Error("#9.4: new Date(2000, 0, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(x94, undefined, 'The value of x94 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 11, 31, 23, 59) !== "object") {
-  throw new Test262Error("#10.1: typeof new Date(2099, 11, 31, 23, 59) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 11, 31, 23, 59),
+  "object",
+  'The value of `typeof new Date(2099, 11, 31, 23, 59)` is expected to be "object"'
+);
 
-if (new Date(2099, 11, 31, 23, 59) === undefined) {
-  throw new Test262Error("#10.2: new Date(2099, 11, 31, 23, 59) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2099, 11, 31, 23, 59),
+  undefined,
+  'new Date(2099, 11, 31, 23, 59) is expected to not equal ``undefined``'
+);
 
 var x103 = new Date(2099, 11, 31, 23, 59);
-if (typeof x103 !== "object") {
-  throw new Test262Error("#10.3: typeof new Date(2099, 11, 31, 23, 59) should be 'object'");
-}
+assert.sameValue(typeof x103, "object", 'The value of `typeof x103` is expected to be "object"');
 
 var x104 = new Date(2099, 11, 31, 23, 59);
-if (x104 === undefined) {
-  throw new Test262Error("#10.4: new Date(2099, 11, 31, 23, 59) should not be undefined");
-}
+assert.notSameValue(x104, undefined, 'The value of x104 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 12, 1, 0, 0) !== "object") {
-  throw new Test262Error("#11.1: typeof new Date(2099, 12, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 12, 1, 0, 0),
+  "object",
+  'The value of `typeof new Date(2099, 12, 1, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2099, 12, 1, 0, 0) === undefined) {
-  throw new Test262Error("#11.2: new Date(2099, 12, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2099, 12, 1, 0, 0),
+  undefined,
+  'new Date(2099, 12, 1, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x113 = new Date(2099, 12, 1, 0, 0);
-if (typeof x113 !== "object") {
-  throw new Test262Error("#11.3: typeof new Date(2099, 12, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x113, "object", 'The value of `typeof x113` is expected to be "object"');
 
 var x114 = new Date(2099, 12, 1, 0, 0);
-if (x114 === undefined) {
-  throw new Test262Error("#11.4: new Date(2099, 12, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(x114, undefined, 'The value of x114 is expected to not equal ``undefined``');
 
-if (typeof new Date(2100, 0, 1, 0, 0) !== "object") {
-  throw new Test262Error("#12.1: typeof new Date(2100, 0, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2100, 0, 1, 0, 0),
+  "object",
+  'The value of `typeof new Date(2100, 0, 1, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2100, 0, 1, 0, 0) === undefined) {
-  throw new Test262Error("#12.2: new Date(2100, 0, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2100, 0, 1, 0, 0),
+  undefined,
+  'new Date(2100, 0, 1, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x123 = new Date(2100, 0, 1, 0, 0);
-if (typeof x123 !== "object") {
-  throw new Test262Error("#12.3: typeof new Date(2100, 0, 1, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x123, "object", 'The value of `typeof x123` is expected to be "object"');
 
 var x124 = new Date(2100, 0, 1, 0, 0);
-if (x124 === undefined) {
-  throw new Test262Error("#12.4: new Date(2100, 0, 1, 0, 0) should not be undefined");
-}
+assert.notSameValue(x124, undefined, 'The value of x124 is expected to not equal ``undefined``');

test/built-ins/Date/S15.9.3.1_A1_T5.js

@@ -8,219 +8,218 @@ info: |
 esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 6 arguments, (year, month, date, hours, minutes, seconds)
 ---*/
+assert.sameValue(
+  typeof new Date(1899, 11, 31, 23, 59, 59),
+  "object",
+  'The value of `typeof new Date(1899, 11, 31, 23, 59, 59)` is expected to be "object"'
+);
 
-if (typeof new Date(1899, 11, 31, 23, 59, 59) !== "object") {
-  throw new Test262Error("#1.1: typeof new Date(1899, 11, 31, 23, 59, 59) should be 'object'");
-}
-
-if (new Date(1899, 11, 31, 23, 59, 59) === undefined) {
-  throw new Test262Error("#1.2: new Date(1899, 11, 31, 23, 59, 59) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1899, 11, 31, 23, 59, 59),
+  undefined,
+  'new Date(1899, 11, 31, 23, 59, 59) is expected to not equal ``undefined``'
+);
 
 var x13 = new Date(1899, 11, 31, 23, 59, 59);
-if (typeof x13 !== "object") {
-  throw new Test262Error("#1.3: typeof new Date(1899, 11, 31, 23, 59, 59) should be 'object'");
-}
+assert.sameValue(typeof x13, "object", 'The value of `typeof x13` is expected to be "object"');
 
 var x14 = new Date(1899, 11, 31, 23, 59, 59);
-if (x14 === undefined) {
-  throw new Test262Error("#1.4: new Date(1899, 11, 31, 23, 59, 59) should not be undefined");
-}
+assert.notSameValue(x14, undefined, 'The value of x14 is expected to not equal ``undefined``');
 
-if (typeof new Date(1899, 12, 1, 0, 0, 0) !== "object") {
-  throw new Test262Error("#2.1: typeof new Date(1899, 12, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1899, 12, 1, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1899, 12, 1, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1899, 12, 1, 0, 0, 0) === undefined) {
-  throw new Test262Error("#2.2: new Date(1899, 12, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1899, 12, 1, 0, 0, 0),
+  undefined,
+  'new Date(1899, 12, 1, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x23 = new Date(1899, 12, 1, 0, 0, 0);
-if (typeof x23 !== "object") {
-  throw new Test262Error("#2.3: typeof new Date(1899, 12, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x23, "object", 'The value of `typeof x23` is expected to be "object"');
 
 var x24 = new Date(1899, 12, 1, 0, 0, 0);
-if (x24 === undefined) {
-  throw new Test262Error("#2.4: new Date(1899, 12, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x24, undefined, 'The value of x24 is expected to not equal ``undefined``');
 
-if (typeof new Date(1900, 0, 1, 0, 0, 0) !== "object") {
-  throw new Test262Error("#3.1: typeof new Date(1900, 0, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1900, 0, 1, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1900, 0, 1, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1900, 0, 1, 0, 0, 0) === undefined) {
-  throw new Test262Error("#3.2: new Date(1900, 0, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1900, 0, 1, 0, 0, 0),
+  undefined,
+  'new Date(1900, 0, 1, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x33 = new Date(1900, 0, 1, 0, 0, 0);
-if (typeof x33 !== "object") {
-  throw new Test262Error("#3.3: typeof new Date(1900, 0, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x33, "object", 'The value of `typeof x33` is expected to be "object"');
 
 var x34 = new Date(1900, 0, 1, 0, 0, 0);
-if (x34 === undefined) {
-  throw new Test262Error("#3.4: new Date(1900, 0, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x34, undefined, 'The value of x34 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 11, 31, 23, 59, 59) !== "object") {
-  throw new Test262Error("#4.1: typeof new Date(1969, 11, 31, 23, 59, 59) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 11, 31, 23, 59, 59),
+  "object",
+  'The value of `typeof new Date(1969, 11, 31, 23, 59, 59)` is expected to be "object"'
+);
 
-if (new Date(1969, 11, 31, 23, 59, 59) === undefined) {
-  throw new Test262Error("#4.2: new Date(1969, 11, 31, 23, 59, 59) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1969, 11, 31, 23, 59, 59),
+  undefined,
+  'new Date(1969, 11, 31, 23, 59, 59) is expected to not equal ``undefined``'
+);
 
 var x43 = new Date(1969, 11, 31, 23, 59, 59);
-if (typeof x43 !== "object") {
-  throw new Test262Error("#4.3: typeof new Date(1969, 11, 31, 23, 59, 59) should be 'object'");
-}
+assert.sameValue(typeof x43, "object", 'The value of `typeof x43` is expected to be "object"');
 
 var x44 = new Date(1969, 11, 31, 23, 59, 59);
-if (x44 === undefined) {
-  throw new Test262Error("#4.4: new Date(1969, 11, 31, 23, 59, 59) should not be undefined");
-}
+assert.notSameValue(x44, undefined, 'The value of x44 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 12, 1, 0, 0, 0) !== "object") {
-  throw new Test262Error("#5.1: typeof new Date(1969, 12, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 12, 1, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1969, 12, 1, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1969, 12, 1, 0, 0, 0) === undefined) {
-  throw new Test262Error("#5.2: new Date(1969, 12, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1969, 12, 1, 0, 0, 0),
+  undefined,
+  'new Date(1969, 12, 1, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x53 = new Date(1969, 12, 1, 0, 0, 0);
-if (typeof x53 !== "object") {
-  throw new Test262Error("#5.3: typeof new Date(1969, 12, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x53, "object", 'The value of `typeof x53` is expected to be "object"');
 
 var x54 = new Date(1969, 12, 1, 0, 0, 0);
-if (x54 === undefined) {
-  throw new Test262Error("#5.4: new Date(1969, 12, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x54, undefined, 'The value of x54 is expected to not equal ``undefined``');
 
-if (typeof new Date(1970, 0, 1, 0, 0, 0) !== "object") {
-  throw new Test262Error("#6.1: typeof new Date(1970, 0, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1970, 0, 1, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1970, 0, 1, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1970, 0, 1, 0, 0, 0) === undefined) {
-  throw new Test262Error("#6.2: new Date(1970, 0, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1970, 0, 1, 0, 0, 0),
+  undefined,
+  'new Date(1970, 0, 1, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x63 = new Date(1970, 0, 1, 0, 0, 0);
-if (typeof x63 !== "object") {
-  throw new Test262Error("#6.3: typeof new Date(1970, 0, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x63, "object", 'The value of `typeof x63` is expected to be "object"');
 
 var x64 = new Date(1970, 0, 1, 0, 0, 0);
-if (x64 === undefined) {
-  throw new Test262Error("#6.4: new Date(1970, 0, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x64, undefined, 'The value of x64 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 11, 31, 23, 59, 59) !== "object") {
-  throw new Test262Error("#7.1: typeof new Date(1999, 11, 31, 23, 59, 59) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 11, 31, 23, 59, 59),
+  "object",
+  'The value of `typeof new Date(1999, 11, 31, 23, 59, 59)` is expected to be "object"'
+);
 
-if (new Date(1999, 11, 31, 23, 59, 59) === undefined) {
-  throw new Test262Error("#7.2: new Date(1999, 11, 31, 23, 59, 59) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1999, 11, 31, 23, 59, 59),
+  undefined,
+  'new Date(1999, 11, 31, 23, 59, 59) is expected to not equal ``undefined``'
+);
 
 var x73 = new Date(1999, 11, 31, 23, 59, 59);
-if (typeof x73 !== "object") {
-  throw new Test262Error("#7.3: typeof new Date(1999, 11, 31, 23, 59, 59) should be 'object'");
-}
+assert.sameValue(typeof x73, "object", 'The value of `typeof x73` is expected to be "object"');
 
 var x74 = new Date(1999, 11, 31, 23, 59, 59);
-if (x74 === undefined) {
-  throw new Test262Error("#7.4: new Date(1999, 11, 31, 23, 59, 59) should not be undefined");
-}
+assert.notSameValue(x74, undefined, 'The value of x74 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 12, 1, 0, 0, 0) !== "object") {
-  throw new Test262Error("#8.1: typeof new Date(1999, 12, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 12, 1, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1999, 12, 1, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1999, 12, 1, 0, 0, 0) === undefined) {
-  throw new Test262Error("#8.2: new Date(1999, 12, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1999, 12, 1, 0, 0, 0),
+  undefined,
+  'new Date(1999, 12, 1, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x83 = new Date(1999, 12, 1, 0, 0, 0);
-if (typeof x83 !== "object") {
-  throw new Test262Error("#8.3: typeof new Date(1999, 12, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x83, "object", 'The value of `typeof x83` is expected to be "object"');
 
 var x84 = new Date(1999, 12, 1, 0, 0, 0);
-if (x84 === undefined) {
-  throw new Test262Error("#8.4: new Date(1999, 12, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x84, undefined, 'The value of x84 is expected to not equal ``undefined``');
 
-if (typeof new Date(2000, 0, 1, 0, 0, 0) !== "object") {
-  throw new Test262Error("#9.1: typeof new Date(2000, 0, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2000, 0, 1, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(2000, 0, 1, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2000, 0, 1, 0, 0, 0) === undefined) {
-  throw new Test262Error("#9.2: new Date(2000, 0, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2000, 0, 1, 0, 0, 0),
+  undefined,
+  'new Date(2000, 0, 1, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x93 = new Date(2000, 0, 1, 0, 0, 0);
-if (typeof x93 !== "object") {
-  throw new Test262Error("#9.3: typeof new Date(2000, 0, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x93, "object", 'The value of `typeof x93` is expected to be "object"');
 
 var x94 = new Date(2000, 0, 1, 0, 0, 0);
-if (x94 === undefined) {
-  throw new Test262Error("#9.4: new Date(2000, 0, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x94, undefined, 'The value of x94 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 11, 31, 23, 59, 59) !== "object") {
-  throw new Test262Error("#10.1: typeof new Date(2099, 11, 31, 23, 59, 59) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 11, 31, 23, 59, 59),
+  "object",
+  'The value of `typeof new Date(2099, 11, 31, 23, 59, 59)` is expected to be "object"'
+);
 
-if (new Date(2099, 11, 31, 23, 59, 59) === undefined) {
-  throw new Test262Error("#10.2: new Date(2099, 11, 31, 23, 59, 59) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2099, 11, 31, 23, 59, 59),
+  undefined,
+  'new Date(2099, 11, 31, 23, 59, 59) is expected to not equal ``undefined``'
+);
 
 var x103 = new Date(2099, 11, 31, 23, 59, 59);
-if (typeof x103 !== "object") {
-  throw new Test262Error("#10.3: typeof new Date(2099, 11, 31, 23, 59, 59) should be 'object'");
-}
+assert.sameValue(typeof x103, "object", 'The value of `typeof x103` is expected to be "object"');
 
 var x104 = new Date(2099, 11, 31, 23, 59, 59);
-if (x104 === undefined) {
-  throw new Test262Error("#10.4: new Date(2099, 11, 31, 23, 59, 59) should not be undefined");
-}
+assert.notSameValue(x104, undefined, 'The value of x104 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 12, 1, 0, 0, 0) !== "object") {
-  throw new Test262Error("#11.1: typeof new Date(2099, 12, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 12, 1, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(2099, 12, 1, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2099, 12, 1, 0, 0, 0) === undefined) {
-  throw new Test262Error("#11.2: new Date(2099, 12, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2099, 12, 1, 0, 0, 0),
+  undefined,
+  'new Date(2099, 12, 1, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x113 = new Date(2099, 12, 1, 0, 0, 0);
-if (typeof x113 !== "object") {
-  throw new Test262Error("#11.3: typeof new Date(2099, 12, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x113, "object", 'The value of `typeof x113` is expected to be "object"');
 
 var x114 = new Date(2099, 12, 1, 0, 0, 0);
-if (x114 === undefined) {
-  throw new Test262Error("#11.4: new Date(2099, 12, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x114, undefined, 'The value of x114 is expected to not equal ``undefined``');
 
-if (typeof new Date(2100, 0, 1, 0, 0, 0) !== "object") {
-  throw new Test262Error("#12.1: typeof new Date(2100, 0, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2100, 0, 1, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(2100, 0, 1, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2100, 0, 1, 0, 0, 0) === undefined) {
-  throw new Test262Error("#12.2: new Date(2100, 0, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2100, 0, 1, 0, 0, 0),
+  undefined,
+  'new Date(2100, 0, 1, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x123 = new Date(2100, 0, 1, 0, 0, 0);
-if (typeof x123 !== "object") {
-  throw new Test262Error("#12.3: typeof new Date(2100, 0, 1, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x123, "object", 'The value of `typeof x123` is expected to be "object"');
 
 var x124 = new Date(2100, 0, 1, 0, 0, 0);
-if (x124 === undefined) {
-  throw new Test262Error("#12.4: new Date(2100, 0, 1, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x124, undefined, 'The value of x124 is expected to not equal ``undefined``');

test/built-ins/Date/S15.9.3.1_A1_T6.js

@@ -8,219 +8,218 @@ info: |
 esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 7 arguments, (year, month, date, hours, minutes, seconds, ms)
 ---*/
+assert.sameValue(
+  typeof new Date(1899, 11, 31, 23, 59, 59, 999),
+  "object",
+  'The value of `typeof new Date(1899, 11, 31, 23, 59, 59, 999)` is expected to be "object"'
+);
 
-if (typeof new Date(1899, 11, 31, 23, 59, 59, 999) !== "object") {
-  throw new Test262Error("#1.1: typeof new Date(1899, 11, 31, 23, 59, 59, 999) should be 'object'");
-}
-
-if (new Date(1899, 11, 31, 23, 59, 59, 999) === undefined) {
-  throw new Test262Error("#1.2: new Date(1899, 11, 31, 23, 59, 59, 999) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1899, 11, 31, 23, 59, 59, 999),
+  undefined,
+  'new Date(1899, 11, 31, 23, 59, 59, 999) is expected to not equal ``undefined``'
+);
 
 var x13 = new Date(1899, 11, 31, 23, 59, 59, 999);
-if (typeof x13 !== "object") {
-  throw new Test262Error("#1.3: typeof new Date(1899, 11, 31, 23, 59, 59, 999) should be 'object'");
-}
+assert.sameValue(typeof x13, "object", 'The value of `typeof x13` is expected to be "object"');
 
 var x14 = new Date(1899, 11, 31, 23, 59, 59, 999);
-if (x14 === undefined) {
-  throw new Test262Error("#1.4: new Date(1899, 11, 31, 23, 59, 59, 999) should not be undefined");
-}
+assert.notSameValue(x14, undefined, 'The value of x14 is expected to not equal ``undefined``');
 
-if (typeof new Date(1899, 12, 1, 0, 0, 0, 0) !== "object") {
-  throw new Test262Error("#2.1: typeof new Date(1899, 12, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1899, 12, 1, 0, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1899, 12, 1, 0, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1899, 12, 1, 0, 0, 0, 0) === undefined) {
-  throw new Test262Error("#2.2: new Date(1899, 12, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1899, 12, 1, 0, 0, 0, 0),
+  undefined,
+  'new Date(1899, 12, 1, 0, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x23 = new Date(1899, 12, 1, 0, 0, 0, 0);
-if (typeof x23 !== "object") {
-  throw new Test262Error("#2.3: typeof new Date(1899, 12, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x23, "object", 'The value of `typeof x23` is expected to be "object"');
 
 var x24 = new Date(1899, 12, 1, 0, 0, 0, 0);
-if (x24 === undefined) {
-  throw new Test262Error("#2.4: new Date(1899, 12, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x24, undefined, 'The value of x24 is expected to not equal ``undefined``');
 
-if (typeof new Date(1900, 0, 1, 0, 0, 0, 0) !== "object") {
-  throw new Test262Error("#3.1: typeof new Date(1900, 0, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1900, 0, 1, 0, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1900, 0, 1, 0, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1900, 0, 1, 0, 0, 0, 0) === undefined) {
-  throw new Test262Error("#3.2: new Date(1900, 0, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1900, 0, 1, 0, 0, 0, 0),
+  undefined,
+  'new Date(1900, 0, 1, 0, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x33 = new Date(1900, 0, 1, 0, 0, 0, 0);
-if (typeof x33 !== "object") {
-  throw new Test262Error("#3.3: typeof new Date(1900, 0, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x33, "object", 'The value of `typeof x33` is expected to be "object"');
 
 var x34 = new Date(1900, 0, 1, 0, 0, 0, 0);
-if (x34 === undefined) {
-  throw new Test262Error("#3.4: new Date(1900, 0, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x34, undefined, 'The value of x34 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 11, 31, 23, 59, 59, 999) !== "object") {
-  throw new Test262Error("#4.1: typeof new Date(1969, 11, 31, 23, 59, 59, 999) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 11, 31, 23, 59, 59, 999),
+  "object",
+  'The value of `typeof new Date(1969, 11, 31, 23, 59, 59, 999)` is expected to be "object"'
+);
 
-if (new Date(1969, 11, 31, 23, 59, 59, 999) === undefined) {
-  throw new Test262Error("#4.2: new Date(1969, 11, 31, 23, 59, 59, 999) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1969, 11, 31, 23, 59, 59, 999),
+  undefined,
+  'new Date(1969, 11, 31, 23, 59, 59, 999) is expected to not equal ``undefined``'
+);
 
 var x43 = new Date(1969, 11, 31, 23, 59, 59, 999);
-if (typeof x43 !== "object") {
-  throw new Test262Error("#4.3: typeof new Date(1969, 11, 31, 23, 59, 59, 999) should be 'object'");
-}
+assert.sameValue(typeof x43, "object", 'The value of `typeof x43` is expected to be "object"');
 
 var x44 = new Date(1969, 11, 31, 23, 59, 59, 999);
-if (x44 === undefined) {
-  throw new Test262Error("#4.4: new Date(1969, 11, 31, 23, 59, 59, 999) should not be undefined");
-}
+assert.notSameValue(x44, undefined, 'The value of x44 is expected to not equal ``undefined``');
 
-if (typeof new Date(1969, 12, 1, 0, 0, 0, 0) !== "object") {
-  throw new Test262Error("#5.1: typeof new Date(1969, 12, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1969, 12, 1, 0, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1969, 12, 1, 0, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1969, 12, 1, 0, 0, 0, 0) === undefined) {
-  throw new Test262Error("#5.2: new Date(1969, 12, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1969, 12, 1, 0, 0, 0, 0),
+  undefined,
+  'new Date(1969, 12, 1, 0, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x53 = new Date(1969, 12, 1, 0, 0, 0, 0);
-if (typeof x53 !== "object") {
-  throw new Test262Error("#5.3: typeof new Date(1969, 12, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x53, "object", 'The value of `typeof x53` is expected to be "object"');
 
 var x54 = new Date(1969, 12, 1, 0, 0, 0, 0);
-if (x54 === undefined) {
-  throw new Test262Error("#5.4: new Date(1969, 12, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x54, undefined, 'The value of x54 is expected to not equal ``undefined``');
 
-if (typeof new Date(1970, 0, 1, 0, 0, 0, 0) !== "object") {
-  throw new Test262Error("#6.1: typeof new Date(1970, 0, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1970, 0, 1, 0, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1970, 0, 1, 0, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1970, 0, 1, 0, 0, 0, 0) === undefined) {
-  throw new Test262Error("#6.2: new Date(1970, 0, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1970, 0, 1, 0, 0, 0, 0),
+  undefined,
+  'new Date(1970, 0, 1, 0, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x63 = new Date(1970, 0, 1, 0, 0, 0, 0);
-if (typeof x63 !== "object") {
-  throw new Test262Error("#6.3: typeof new Date(1970, 0, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x63, "object", 'The value of `typeof x63` is expected to be "object"');
 
 var x64 = new Date(1970, 0, 1, 0, 0, 0, 0);
-if (x64 === undefined) {
-  throw new Test262Error("#6.4: new Date(1970, 0, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x64, undefined, 'The value of x64 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 11, 31, 23, 59, 59, 999) !== "object") {
-  throw new Test262Error("#7.1: typeof new Date(1999, 11, 31, 23, 59, 59, 999) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 11, 31, 23, 59, 59, 999),
+  "object",
+  'The value of `typeof new Date(1999, 11, 31, 23, 59, 59, 999)` is expected to be "object"'
+);
 
-if (new Date(1999, 11, 31, 23, 59, 59, 999) === undefined) {
-  throw new Test262Error("#7.2: new Date(1999, 11, 31, 23, 59, 59, 999) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1999, 11, 31, 23, 59, 59, 999),
+  undefined,
+  'new Date(1999, 11, 31, 23, 59, 59, 999) is expected to not equal ``undefined``'
+);
 
 var x73 = new Date(1999, 11, 31, 23, 59, 59, 999);
-if (typeof x73 !== "object") {
-  throw new Test262Error("#7.3: typeof new Date(1999, 11, 31, 23, 59, 59, 999) should be 'object'");
-}
+assert.sameValue(typeof x73, "object", 'The value of `typeof x73` is expected to be "object"');
 
 var x74 = new Date(1999, 11, 31, 23, 59, 59, 999);
-if (x74 === undefined) {
-  throw new Test262Error("#7.4: new Date(1999, 11, 31, 23, 59, 59, 999) should not be undefined");
-}
+assert.notSameValue(x74, undefined, 'The value of x74 is expected to not equal ``undefined``');
 
-if (typeof new Date(1999, 12, 1, 0, 0, 0, 0) !== "object") {
-  throw new Test262Error("#8.1: typeof new Date(1999, 12, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(1999, 12, 1, 0, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(1999, 12, 1, 0, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(1999, 12, 1, 0, 0, 0, 0) === undefined) {
-  throw new Test262Error("#8.2: new Date(1999, 12, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(1999, 12, 1, 0, 0, 0, 0),
+  undefined,
+  'new Date(1999, 12, 1, 0, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x83 = new Date(1999, 12, 1, 0, 0, 0, 0);
-if (typeof x83 !== "object") {
-  throw new Test262Error("#8.3: typeof new Date(1999, 12, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x83, "object", 'The value of `typeof x83` is expected to be "object"');
 
 var x84 = new Date(1999, 12, 1, 0, 0, 0, 0);
-if (x84 === undefined) {
-  throw new Test262Error("#8.4: new Date(1999, 12, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x84, undefined, 'The value of x84 is expected to not equal ``undefined``');
 
-if (typeof new Date(2000, 0, 1, 0, 0, 0, 0) !== "object") {
-  throw new Test262Error("#9.1: typeof new Date(2000, 0, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2000, 0, 1, 0, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(2000, 0, 1, 0, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2000, 0, 1, 0, 0, 0, 0) === undefined) {
-  throw new Test262Error("#9.2: new Date(2000, 0, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2000, 0, 1, 0, 0, 0, 0),
+  undefined,
+  'new Date(2000, 0, 1, 0, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x93 = new Date(2000, 0, 1, 0, 0, 0, 0);
-if (typeof x93 !== "object") {
-  throw new Test262Error("#9.3: typeof new Date(2000, 0, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x93, "object", 'The value of `typeof x93` is expected to be "object"');
 
 var x94 = new Date(2000, 0, 1, 0, 0, 0, 0);
-if (x94 === undefined) {
-  throw new Test262Error("#9.4: new Date(2000, 0, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x94, undefined, 'The value of x94 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 11, 31, 23, 59, 59, 999) !== "object") {
-  throw new Test262Error("#10.1: typeof new Date(2099, 11, 31, 23, 59, 59, 999) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 11, 31, 23, 59, 59, 999),
+  "object",
+  'The value of `typeof new Date(2099, 11, 31, 23, 59, 59, 999)` is expected to be "object"'
+);
 
-if (new Date(2099, 11, 31, 23, 59, 59, 999) === undefined) {
-  throw new Test262Error("#10.2: new Date(2099, 11, 31, 23, 59, 59, 999) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2099, 11, 31, 23, 59, 59, 999),
+  undefined,
+  'new Date(2099, 11, 31, 23, 59, 59, 999) is expected to not equal ``undefined``'
+);
 
 var x103 = new Date(2099, 11, 31, 23, 59, 59, 999);
-if (typeof x103 !== "object") {
-  throw new Test262Error("#10.3: typeof new Date(2099, 11, 31, 23, 59, 59, 999) should be 'object'");
-}
+assert.sameValue(typeof x103, "object", 'The value of `typeof x103` is expected to be "object"');
 
 var x104 = new Date(2099, 11, 31, 23, 59, 59, 999);
-if (x104 === undefined) {
-  throw new Test262Error("#10.4: new Date(2099, 11, 31, 23, 59, 59, 999) should not be undefined");
-}
+assert.notSameValue(x104, undefined, 'The value of x104 is expected to not equal ``undefined``');
 
-if (typeof new Date(2099, 12, 1, 0, 0, 0, 0) !== "object") {
-  throw new Test262Error("#11.1: typeof new Date(2099, 12, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2099, 12, 1, 0, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(2099, 12, 1, 0, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2099, 12, 1, 0, 0, 0, 0) === undefined) {
-  throw new Test262Error("#11.2: new Date(2099, 12, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2099, 12, 1, 0, 0, 0, 0),
+  undefined,
+  'new Date(2099, 12, 1, 0, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x113 = new Date(2099, 12, 1, 0, 0, 0, 0);
-if (typeof x113 !== "object") {
-  throw new Test262Error("#11.3: typeof new Date(2099, 12, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x113, "object", 'The value of `typeof x113` is expected to be "object"');
 
 var x114 = new Date(2099, 12, 1, 0, 0, 0, 0);
-if (x114 === undefined) {
-  throw new Test262Error("#11.4: new Date(2099, 12, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x114, undefined, 'The value of x114 is expected to not equal ``undefined``');
 
-if (typeof new Date(2100, 0, 1, 0, 0, 0, 0) !== "object") {
-  throw new Test262Error("#12.1: typeof new Date(2100, 0, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(
+  typeof new Date(2100, 0, 1, 0, 0, 0, 0),
+  "object",
+  'The value of `typeof new Date(2100, 0, 1, 0, 0, 0, 0)` is expected to be "object"'
+);
 
-if (new Date(2100, 0, 1, 0, 0, 0, 0) === undefined) {
-  throw new Test262Error("#12.2: new Date(2100, 0, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(
+  new Date(2100, 0, 1, 0, 0, 0, 0),
+  undefined,
+  'new Date(2100, 0, 1, 0, 0, 0, 0) is expected to not equal ``undefined``'
+);
 
 var x123 = new Date(2100, 0, 1, 0, 0, 0, 0);
-if (typeof x123 !== "object") {
-  throw new Test262Error("#12.3: typeof new Date(2100, 0, 1, 0, 0, 0, 0) should be 'object'");
-}
+assert.sameValue(typeof x123, "object", 'The value of `typeof x123` is expected to be "object"');
 
 var x124 = new Date(2100, 0, 1, 0, 0, 0, 0);
-if (x124 === undefined) {
-  throw new Test262Error("#12.4: new Date(2100, 0, 1, 0, 0, 0, 0) should not be undefined");
-}
+assert.notSameValue(x124, undefined, 'The value of x124 is expected to not equal ``undefined``');

test/built-ins/Date/S15.9.3.1_A2_T1.js

@@ -11,181 +11,229 @@ description: 2 arguments, (year, month)
 ---*/
 
 var x11 = new Date(1899, 11);
-if (typeof x11.constructor.prototype !== "object") {
-  throw new Test262Error("#1.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x11.constructor.prototype,
+  "object",
+  'The value of `typeof x11.constructor.prototype` is expected to be "object"'
+);
 
 var x12 = new Date(1899, 11);
-if (!Date.prototype.isPrototypeOf(x12)) {
-  throw new Test262Error('#1.2: Date.prototype.isPrototypeOf(x12)');
-}
+assert(Date.prototype.isPrototypeOf(x12), 'Date.prototype.isPrototypeOf(x12) must return true');
 
 var x13 = new Date(1899, 11);
-if (Date.prototype !== x13.constructor.prototype) {
-  throw new Test262Error("#1.3: Date.prototype === x13.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x13.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x13.constructor.prototype'
+);
 
 var x21 = new Date(1899, 12);
-if (typeof x21.constructor.prototype !== "object") {
-  throw new Test262Error("#2.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x21.constructor.prototype,
+  "object",
+  'The value of `typeof x21.constructor.prototype` is expected to be "object"'
+);
 
 var x22 = new Date(1899, 12);
-if (!Date.prototype.isPrototypeOf(x22)) {
-  throw new Test262Error('#2.2: Date.prototype.isPrototypeOf(x22)');
-}
+assert(Date.prototype.isPrototypeOf(x22), 'Date.prototype.isPrototypeOf(x22) must return true');
 
 var x23 = new Date(1899, 12);
-if (Date.prototype !== x23.constructor.prototype) {
-  throw new Test262Error("#2.3: Date.prototype === x23.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x23.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x23.constructor.prototype'
+);
 
 var x31 = new Date(1900, 0);
-if (typeof x31.constructor.prototype !== "object") {
-  throw new Test262Error("#3.1: typeof x31.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x31.constructor.prototype,
+  "object",
+  'The value of `typeof x31.constructor.prototype` is expected to be "object"'
+);
 
 var x32 = new Date(1900, 0);
-if (!Date.prototype.isPrototypeOf(x32)) {
-  throw new Test262Error('#3.2: Date.prototype.isPrototypeOf(x32)');
-}
+assert(Date.prototype.isPrototypeOf(x32), 'Date.prototype.isPrototypeOf(x32) must return true');
 
 var x33 = new Date(1900, 0);
-if (Date.prototype !== x33.constructor.prototype) {
-  throw new Test262Error("#3.3: Date.prototype === x33.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x33.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x33.constructor.prototype'
+);
 
 var x41 = new Date(1969, 11);
-if (typeof x41.constructor.prototype !== "object") {
-  throw new Test262Error("#4.1: typeof x41.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x41.constructor.prototype,
+  "object",
+  'The value of `typeof x41.constructor.prototype` is expected to be "object"'
+);
 
 var x42 = new Date(1969, 11);
-if (!Date.prototype.isPrototypeOf(x42)) {
-  throw new Test262Error('#4.2: Date.prototype.isPrototypeOf(x42)');
-}
+assert(Date.prototype.isPrototypeOf(x42), 'Date.prototype.isPrototypeOf(x42) must return true');
 
 var x43 = new Date(1969, 11);
-if (Date.prototype !== x43.constructor.prototype) {
-  throw new Test262Error("#4.3: Date.prototype === x43.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x43.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x43.constructor.prototype'
+);
 
 var x51 = new Date(1969, 12);
-if (typeof x51.constructor.prototype !== "object") {
-  throw new Test262Error("#5.1: typeof x51.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x51.constructor.prototype,
+  "object",
+  'The value of `typeof x51.constructor.prototype` is expected to be "object"'
+);
 
 var x52 = new Date(1969, 12);
-if (!Date.prototype.isPrototypeOf(x52)) {
-  throw new Test262Error('#5.2: Date.prototype.isPrototypeOf(x52)');
-}
+assert(Date.prototype.isPrototypeOf(x52), 'Date.prototype.isPrototypeOf(x52) must return true');
 
 var x53 = new Date(1969, 12);
-if (Date.prototype !== x53.constructor.prototype) {
-  throw new Test262Error("#5.3: Date.prototype === x53.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x53.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x53.constructor.prototype'
+);
 
 var x61 = new Date(1970, 0);
-if (typeof x61.constructor.prototype !== "object") {
-  throw new Test262Error("#6.1: typeof x61.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x61.constructor.prototype,
+  "object",
+  'The value of `typeof x61.constructor.prototype` is expected to be "object"'
+);
 
 var x62 = new Date(1970, 0);
-if (!Date.prototype.isPrototypeOf(x62)) {
-  throw new Test262Error('#6.2: Date.prototype.isPrototypeOf(x62)');
-}
+assert(Date.prototype.isPrototypeOf(x62), 'Date.prototype.isPrototypeOf(x62) must return true');
 
 var x63 = new Date(1970, 0);
-if (Date.prototype !== x63.constructor.prototype) {
-  throw new Test262Error("#6.3: Date.prototype === x63.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x63.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x63.constructor.prototype'
+);
 
 var x71 = new Date(1999, 11);
-if (typeof x71.constructor.prototype !== "object") {
-  throw new Test262Error("#7.1: typeof x71.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x71.constructor.prototype,
+  "object",
+  'The value of `typeof x71.constructor.prototype` is expected to be "object"'
+);
 
 var x72 = new Date(1999, 11);
-if (!Date.prototype.isPrototypeOf(x72)) {
-  throw new Test262Error('#7.2: Date.prototype.isPrototypeOf(x72)');
-}
+assert(Date.prototype.isPrototypeOf(x72), 'Date.prototype.isPrototypeOf(x72) must return true');
 
 var x73 = new Date(1999, 11);
-if (Date.prototype !== x73.constructor.prototype) {
-  throw new Test262Error("#7.3: Date.prototype === x73.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x73.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x73.constructor.prototype'
+);
 
 var x81 = new Date(1999, 12);
-if (typeof x81.constructor.prototype !== "object") {
-  throw new Test262Error("#8.1: typeof x81.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x81.constructor.prototype,
+  "object",
+  'The value of `typeof x81.constructor.prototype` is expected to be "object"'
+);
 
 var x82 = new Date(1999, 12);
-if (!Date.prototype.isPrototypeOf(x82)) {
-  throw new Test262Error('#8.2: Date.prototype.isPrototypeOf(x82)');
-}
+assert(Date.prototype.isPrototypeOf(x82), 'Date.prototype.isPrototypeOf(x82) must return true');
 
 var x83 = new Date(1999, 12);
-if (Date.prototype !== x83.constructor.prototype) {
-  throw new Test262Error("#8.3: Date.prototype === x83.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x83.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x83.constructor.prototype'
+);
 
 var x91 = new Date(2000, 0);
-if (typeof x91.constructor.prototype !== "object") {
-  throw new Test262Error("#9.1: typeof x91.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x91.constructor.prototype,
+  "object",
+  'The value of `typeof x91.constructor.prototype` is expected to be "object"'
+);
 
 var x92 = new Date(2000, 0);
-if (!Date.prototype.isPrototypeOf(x92)) {
-  throw new Test262Error('#9.2: Date.prototype.isPrototypeOf(x92)');
-}
+assert(Date.prototype.isPrototypeOf(x92), 'Date.prototype.isPrototypeOf(x92) must return true');
 
 var x93 = new Date(2000, 0);
-if (Date.prototype !== x93.constructor.prototype) {
-  throw new Test262Error("#9.3: Date.prototype === x93.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x93.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x93.constructor.prototype'
+);
 
 var x101 = new Date(2099, 11);
-if (typeof x101.constructor.prototype !== "object") {
-  throw new Test262Error("#10.1: typeof x101.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x101.constructor.prototype,
+  "object",
+  'The value of `typeof x101.constructor.prototype` is expected to be "object"'
+);
 
 var x102 = new Date(2099, 11);
-if (!Date.prototype.isPrototypeOf(x102)) {
-  throw new Test262Error('#10.2: Date.prototype.isPrototypeOf(x102)');
-}
+assert(Date.prototype.isPrototypeOf(x102), 'Date.prototype.isPrototypeOf(x102) must return true');
 
 var x103 = new Date(2099, 11);
-if (Date.prototype !== x103.constructor.prototype) {
-  throw new Test262Error("#10.3: Date.prototype === x103.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x103.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x103.constructor.prototype'
+);
 
 var x111 = new Date(2099, 12);
-if (typeof x111.constructor.prototype !== "object") {
-  throw new Test262Error("#11.1: typeof x111.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x111.constructor.prototype,
+  "object",
+  'The value of `typeof x111.constructor.prototype` is expected to be "object"'
+);
 
 var x112 = new Date(2099, 12);
-if (!Date.prototype.isPrototypeOf(x112)) {
-  throw new Test262Error('#11.2: Date.prototype.isPrototypeOf(x112)');
-}
+assert(Date.prototype.isPrototypeOf(x112), 'Date.prototype.isPrototypeOf(x112) must return true');
 
 var x113 = new Date(2099, 12);
-if (Date.prototype !== x113.constructor.prototype) {
-  throw new Test262Error("#11.3: Date.prototype === x113.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x113.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x113.constructor.prototype'
+);
 
 var x121 = new Date(2100, 0);
-if (typeof x121.constructor.prototype !== "object") {
-  throw new Test262Error("#12.1: typeof x121.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x121.constructor.prototype,
+  "object",
+  'The value of `typeof x121.constructor.prototype` is expected to be "object"'
+);
 
 var x122 = new Date(2100, 0);
-if (!Date.prototype.isPrototypeOf(x122)) {
-  throw new Test262Error('#12.2: Date.prototype.isPrototypeOf(x122)');
-}
+assert(Date.prototype.isPrototypeOf(x122), 'Date.prototype.isPrototypeOf(x122) must return true');
 
 var x123 = new Date(2100, 0);
-if (Date.prototype !== x123.constructor.prototype) {
-  throw new Test262Error("#12.3: Date.prototype === x123.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x123.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x123.constructor.prototype'
+);

test/built-ins/Date/S15.9.3.1_A2_T2.js

@@ -11,181 +11,229 @@ description: 3 arguments, (year, month, date)
 ---*/
 
 var x11 = new Date(1899, 11, 31);
-if (typeof x11.constructor.prototype !== "object") {
-  throw new Test262Error("#1.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x11.constructor.prototype,
+  "object",
+  'The value of `typeof x11.constructor.prototype` is expected to be "object"'
+);
 
 var x12 = new Date(1899, 11, 31);
-if (!Date.prototype.isPrototypeOf(x12)) {
-  throw new Test262Error('#1.2: Date.prototype.isPrototypeOf(x12)');
-}
+assert(Date.prototype.isPrototypeOf(x12), 'Date.prototype.isPrototypeOf(x12) must return true');
 
 var x13 = new Date(1899, 11, 31);
-if (Date.prototype !== x13.constructor.prototype) {
-  throw new Test262Error("#1.3: Date.prototype === x13.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x13.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x13.constructor.prototype'
+);
 
 var x21 = new Date(1899, 12, 1);
-if (typeof x21.constructor.prototype !== "object") {
-  throw new Test262Error("#2.1: typeof x21.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x21.constructor.prototype,
+  "object",
+  'The value of `typeof x21.constructor.prototype` is expected to be "object"'
+);
 
 var x22 = new Date(1899, 12, 1);
-if (!Date.prototype.isPrototypeOf(x22)) {
-  throw new Test262Error('#2.2: Date.prototype.isPrototypeOf(x22)');
-}
+assert(Date.prototype.isPrototypeOf(x22), 'Date.prototype.isPrototypeOf(x22) must return true');
 
 var x23 = new Date(1899, 12, 1);
-if (Date.prototype !== x23.constructor.prototype) {
-  throw new Test262Error("#2.3: Date.prototype === x23.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x23.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x23.constructor.prototype'
+);
 
 var x31 = new Date(1900, 0, 1);
-if (typeof x31.constructor.prototype !== "object") {
-  throw new Test262Error("#3.1: typeof x31.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x31.constructor.prototype,
+  "object",
+  'The value of `typeof x31.constructor.prototype` is expected to be "object"'
+);
 
 var x32 = new Date(1900, 0, 1);
-if (!Date.prototype.isPrototypeOf(x32)) {
-  throw new Test262Error('#3.2: Date.prototype.isPrototypeOf(x32)');
-}
+assert(Date.prototype.isPrototypeOf(x32), 'Date.prototype.isPrototypeOf(x32) must return true');
 
 var x33 = new Date(1900, 0, 1);
-if (Date.prototype !== x33.constructor.prototype) {
-  throw new Test262Error("#3.3: Date.prototype === x33.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x33.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x33.constructor.prototype'
+);
 
 var x41 = new Date(1969, 11, 31);
-if (typeof x41.constructor.prototype !== "object") {
-  throw new Test262Error("#4.1: typeof x41.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x41.constructor.prototype,
+  "object",
+  'The value of `typeof x41.constructor.prototype` is expected to be "object"'
+);
 
 var x42 = new Date(1969, 11, 31);
-if (!Date.prototype.isPrototypeOf(x42)) {
-  throw new Test262Error('#4.2: Date.prototype.isPrototypeOf(x42)');
-}
+assert(Date.prototype.isPrototypeOf(x42), 'Date.prototype.isPrototypeOf(x42) must return true');
 
 var x43 = new Date(1969, 11, 31);
-if (Date.prototype !== x43.constructor.prototype) {
-  throw new Test262Error("#4.3: Date.prototype === x43.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x43.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x43.constructor.prototype'
+);
 
 var x51 = new Date(1969, 12, 1);
-if (typeof x51.constructor.prototype !== "object") {
-  throw new Test262Error("#5.1: typeof x51.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x51.constructor.prototype,
+  "object",
+  'The value of `typeof x51.constructor.prototype` is expected to be "object"'
+);
 
 var x52 = new Date(1969, 12, 1);
-if (!Date.prototype.isPrototypeOf(x52)) {
-  throw new Test262Error('#5.2: Date.prototype.isPrototypeOf(x52)');
-}
+assert(Date.prototype.isPrototypeOf(x52), 'Date.prototype.isPrototypeOf(x52) must return true');
 
 var x53 = new Date(1969, 12, 1);
-if (Date.prototype !== x53.constructor.prototype) {
-  throw new Test262Error("#5.3: Date.prototype === x53.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x53.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x53.constructor.prototype'
+);
 
 var x61 = new Date(1970, 0, 1);
-if (typeof x61.constructor.prototype !== "object") {
-  throw new Test262Error("#6.1: typeof x61.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x61.constructor.prototype,
+  "object",
+  'The value of `typeof x61.constructor.prototype` is expected to be "object"'
+);
 
 var x62 = new Date(1970, 0, 1);
-if (!Date.prototype.isPrototypeOf(x62)) {
-  throw new Test262Error('#6.2: Date.prototype.isPrototypeOf(x62)');
-}
+assert(Date.prototype.isPrototypeOf(x62), 'Date.prototype.isPrototypeOf(x62) must return true');
 
 var x63 = new Date(1970, 0, 1);
-if (Date.prototype !== x63.constructor.prototype) {
-  throw new Test262Error("#6.3: Date.prototype === x63.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x63.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x63.constructor.prototype'
+);
 
 var x71 = new Date(1999, 11, 31);
-if (typeof x71.constructor.prototype !== "object") {
-  throw new Test262Error("#7.1: typeof x71.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x71.constructor.prototype,
+  "object",
+  'The value of `typeof x71.constructor.prototype` is expected to be "object"'
+);
 
 var x72 = new Date(1999, 11, 31);
-if (!Date.prototype.isPrototypeOf(x72)) {
-  throw new Test262Error('#7.2: Date.prototype.isPrototypeOf(x72)');
-}
+assert(Date.prototype.isPrototypeOf(x72), 'Date.prototype.isPrototypeOf(x72) must return true');
 
 var x73 = new Date(1999, 11, 31);
-if (Date.prototype !== x73.constructor.prototype) {
-  throw new Test262Error("#7.3: Date.prototype === x73.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x73.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x73.constructor.prototype'
+);
 
 var x81 = new Date(1999, 12, 1);
-if (typeof x81.constructor.prototype !== "object") {
-  throw new Test262Error("#8.1: typeof x81.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x81.constructor.prototype,
+  "object",
+  'The value of `typeof x81.constructor.prototype` is expected to be "object"'
+);
 
 var x82 = new Date(1999, 12, 1);
-if (!Date.prototype.isPrototypeOf(x82)) {
-  throw new Test262Error('#8.2: Date.prototype.isPrototypeOf(x82)');
-}
+assert(Date.prototype.isPrototypeOf(x82), 'Date.prototype.isPrototypeOf(x82) must return true');
 
 var x83 = new Date(1999, 12, 1);
-if (Date.prototype !== x83.constructor.prototype) {
-  throw new Test262Error("#8.3: Date.prototype === x83.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x83.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x83.constructor.prototype'
+);
 
 var x91 = new Date(2000, 0, 1);
-if (typeof x91.constructor.prototype !== "object") {
-  throw new Test262Error("#9.1: typeof x91.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x91.constructor.prototype,
+  "object",
+  'The value of `typeof x91.constructor.prototype` is expected to be "object"'
+);
 
 var x92 = new Date(2000, 0, 1);
-if (!Date.prototype.isPrototypeOf(x92)) {
-  throw new Test262Error('#9.2: Date.prototype.isPrototypeOf(x92)');
-}
+assert(Date.prototype.isPrototypeOf(x92), 'Date.prototype.isPrototypeOf(x92) must return true');
 
 var x93 = new Date(2000, 0, 1);
-if (Date.prototype !== x93.constructor.prototype) {
-  throw new Test262Error("#9.3: Date.prototype === x93.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x93.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x93.constructor.prototype'
+);
 
 var x101 = new Date(2099, 11, 31);
-if (typeof x101.constructor.prototype !== "object") {
-  throw new Test262Error("#10.1: typeof x101.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x101.constructor.prototype,
+  "object",
+  'The value of `typeof x101.constructor.prototype` is expected to be "object"'
+);
 
 var x102 = new Date(2099, 11, 31);
-if (!Date.prototype.isPrototypeOf(x102)) {
-  throw new Test262Error('#10.2: Date.prototype.isPrototypeOf(x102)');
-}
+assert(Date.prototype.isPrototypeOf(x102), 'Date.prototype.isPrototypeOf(x102) must return true');
 
 var x103 = new Date(2099, 11, 31);
-if (Date.prototype !== x103.constructor.prototype) {
-  throw new Test262Error("#10.3: Date.prototype === x103.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x103.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x103.constructor.prototype'
+);
 
 var x111 = new Date(2099, 12, 1);
-if (typeof x111.constructor.prototype !== "object") {
-  throw new Test262Error("#11.1: typeof x111.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x111.constructor.prototype,
+  "object",
+  'The value of `typeof x111.constructor.prototype` is expected to be "object"'
+);
 
 var x112 = new Date(2099, 12, 1);
-if (!Date.prototype.isPrototypeOf(x112)) {
-  throw new Test262Error('#11.2: Date.prototype.isPrototypeOf(x112)');
-}
+assert(Date.prototype.isPrototypeOf(x112), 'Date.prototype.isPrototypeOf(x112) must return true');
 
 var x113 = new Date(2099, 12, 1);
-if (Date.prototype !== x113.constructor.prototype) {
-  throw new Test262Error("#11.3: Date.prototype === x113.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x113.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x113.constructor.prototype'
+);
 
 var x121 = new Date(2100, 0, 1);
-if (typeof x121.constructor.prototype !== "object") {
-  throw new Test262Error("#12.1: typeof x121.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x121.constructor.prototype,
+  "object",
+  'The value of `typeof x121.constructor.prototype` is expected to be "object"'
+);
 
 var x122 = new Date(2100, 0, 1);
-if (!Date.prototype.isPrototypeOf(x122)) {
-  throw new Test262Error('#12.2: Date.prototype.isPrototypeOf(x122)');
-}
+assert(Date.prototype.isPrototypeOf(x122), 'Date.prototype.isPrototypeOf(x122) must return true');
 
 var x123 = new Date(2100, 0, 1);
-if (Date.prototype !== x123.constructor.prototype) {
-  throw new Test262Error("#12.3: Date.prototype === x123.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x123.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x123.constructor.prototype'
+);

test/built-ins/Date/S15.9.3.1_A2_T3.js

@@ -11,181 +11,229 @@ description: 4 arguments, (year, month, date, hours)
 ---*/
 
 var x11 = new Date(1899, 11, 31, 23);
-if (typeof x11.constructor.prototype !== "object") {
-  throw new Test262Error("#1.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x11.constructor.prototype,
+  "object",
+  'The value of `typeof x11.constructor.prototype` is expected to be "object"'
+);
 
 var x12 = new Date(1899, 11, 31, 23);
-if (!Date.prototype.isPrototypeOf(x12)) {
-  throw new Test262Error('#1.2: Date.prototype.isPrototypeOf(x12)');
-}
+assert(Date.prototype.isPrototypeOf(x12), 'Date.prototype.isPrototypeOf(x12) must return true');
 
 var x13 = new Date(1899, 11, 31, 23);
-if (Date.prototype !== x13.constructor.prototype) {
-  throw new Test262Error("#1.3: Date.prototype === x13.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x13.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x13.constructor.prototype'
+);
 
 var x21 = new Date(1899, 12, 1, 0);
-if (typeof x21.constructor.prototype !== "object") {
-  throw new Test262Error("#2.1: typeof x21.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x21.constructor.prototype,
+  "object",
+  'The value of `typeof x21.constructor.prototype` is expected to be "object"'
+);
 
 var x22 = new Date(1899, 12, 1, 0);
-if (!Date.prototype.isPrototypeOf(x22)) {
-  throw new Test262Error('#2.2: Date.prototype.isPrototypeOf(x22)');
-}
+assert(Date.prototype.isPrototypeOf(x22), 'Date.prototype.isPrototypeOf(x22) must return true');
 
 var x23 = new Date(1899, 12, 1, 0);
-if (Date.prototype !== x23.constructor.prototype) {
-  throw new Test262Error("#2.3: Date.prototype === x23.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x23.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x23.constructor.prototype'
+);
 
 var x31 = new Date(1900, 0, 1, 0);
-if (typeof x31.constructor.prototype !== "object") {
-  throw new Test262Error("#3.1: typeof x31.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x31.constructor.prototype,
+  "object",
+  'The value of `typeof x31.constructor.prototype` is expected to be "object"'
+);
 
 var x32 = new Date(1900, 0, 1, 0);
-if (!Date.prototype.isPrototypeOf(x32)) {
-  throw new Test262Error('#3.2: Date.prototype.isPrototypeOf(x32)');
-}
+assert(Date.prototype.isPrototypeOf(x32), 'Date.prototype.isPrototypeOf(x32) must return true');
 
 var x33 = new Date(1900, 0, 1, 0);
-if (Date.prototype !== x33.constructor.prototype) {
-  throw new Test262Error("#3.3: Date.prototype === x33.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x33.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x33.constructor.prototype'
+);
 
 var x41 = new Date(1969, 11, 31, 23);
-if (typeof x41.constructor.prototype !== "object") {
-  throw new Test262Error("#4.1: typeof x41.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x41.constructor.prototype,
+  "object",
+  'The value of `typeof x41.constructor.prototype` is expected to be "object"'
+);
 
 var x42 = new Date(1969, 11, 31, 23);
-if (!Date.prototype.isPrototypeOf(x42)) {
-  throw new Test262Error('#4.2: Date.prototype.isPrototypeOf(x42)');
-}
+assert(Date.prototype.isPrototypeOf(x42), 'Date.prototype.isPrototypeOf(x42) must return true');
 
 var x43 = new Date(1969, 11, 31, 23);
-if (Date.prototype !== x43.constructor.prototype) {
-  throw new Test262Error("#4.3: Date.prototype === x43.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x43.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x43.constructor.prototype'
+);
 
 var x51 = new Date(1969, 12, 1, 0);
-if (typeof x51.constructor.prototype !== "object") {
-  throw new Test262Error("#5.1: typeof x51.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x51.constructor.prototype,
+  "object",
+  'The value of `typeof x51.constructor.prototype` is expected to be "object"'
+);
 
 var x52 = new Date(1969, 12, 1, 0);
-if (!Date.prototype.isPrototypeOf(x52)) {
-  throw new Test262Error('#5.2: Date.prototype.isPrototypeOf(x52)');
-}
+assert(Date.prototype.isPrototypeOf(x52), 'Date.prototype.isPrototypeOf(x52) must return true');
 
 var x53 = new Date(1969, 12, 1, 0);
-if (Date.prototype !== x53.constructor.prototype) {
-  throw new Test262Error("#5.3: Date.prototype === x53.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x53.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x53.constructor.prototype'
+);
 
 var x61 = new Date(1970, 0, 1, 0);
-if (typeof x61.constructor.prototype !== "object") {
-  throw new Test262Error("#6.1: typeof x61.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x61.constructor.prototype,
+  "object",
+  'The value of `typeof x61.constructor.prototype` is expected to be "object"'
+);
 
 var x62 = new Date(1970, 0, 1, 0);
-if (!Date.prototype.isPrototypeOf(x62)) {
-  throw new Test262Error('#6.2: Date.prototype.isPrototypeOf(x62)');
-}
+assert(Date.prototype.isPrototypeOf(x62), 'Date.prototype.isPrototypeOf(x62) must return true');
 
 var x63 = new Date(1970, 0, 1, 0);
-if (Date.prototype !== x63.constructor.prototype) {
-  throw new Test262Error("#6.3: Date.prototype === x63.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x63.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x63.constructor.prototype'
+);
 
 var x71 = new Date(1999, 11, 31, 23);
-if (typeof x71.constructor.prototype !== "object") {
-  throw new Test262Error("#7.1: typeof x71.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x71.constructor.prototype,
+  "object",
+  'The value of `typeof x71.constructor.prototype` is expected to be "object"'
+);
 
 var x72 = new Date(1999, 11, 31, 23);
-if (!Date.prototype.isPrototypeOf(x72)) {
-  throw new Test262Error('#7.2: Date.prototype.isPrototypeOf(x72)');
-}
+assert(Date.prototype.isPrototypeOf(x72), 'Date.prototype.isPrototypeOf(x72) must return true');
 
 var x73 = new Date(1999, 11, 31, 23);
-if (Date.prototype !== x73.constructor.prototype) {
-  throw new Test262Error("#7.3: Date.prototype === x73.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x73.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x73.constructor.prototype'
+);
 
 var x81 = new Date(1999, 12, 1, 0);
-if (typeof x81.constructor.prototype !== "object") {
-  throw new Test262Error("#8.1: typeof x81.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x81.constructor.prototype,
+  "object",
+  'The value of `typeof x81.constructor.prototype` is expected to be "object"'
+);
 
 var x82 = new Date(1999, 12, 1, 0);
-if (!Date.prototype.isPrototypeOf(x82)) {
-  throw new Test262Error('#8.2: Date.prototype.isPrototypeOf(x82)');
-}
+assert(Date.prototype.isPrototypeOf(x82), 'Date.prototype.isPrototypeOf(x82) must return true');
 
 var x83 = new Date(1999, 12, 1, 0);
-if (Date.prototype !== x83.constructor.prototype) {
-  throw new Test262Error("#8.3: Date.prototype === x83.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x83.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x83.constructor.prototype'
+);
 
 var x91 = new Date(2000, 0, 1, 0);
-if (typeof x91.constructor.prototype !== "object") {
-  throw new Test262Error("#9.1: typeof x91.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x91.constructor.prototype,
+  "object",
+  'The value of `typeof x91.constructor.prototype` is expected to be "object"'
+);
 
 var x92 = new Date(2000, 0, 1, 0);
-if (!Date.prototype.isPrototypeOf(x92)) {
-  throw new Test262Error('#9.2: Date.prototype.isPrototypeOf(x92)');
-}
+assert(Date.prototype.isPrototypeOf(x92), 'Date.prototype.isPrototypeOf(x92) must return true');
 
 var x93 = new Date(2000, 0, 1, 0);
-if (Date.prototype !== x93.constructor.prototype) {
-  throw new Test262Error("#9.3: Date.prototype === x93.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x93.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x93.constructor.prototype'
+);
 
 var x101 = new Date(2099, 11, 31, 23);
-if (typeof x101.constructor.prototype !== "object") {
-  throw new Test262Error("#10.1: typeof x101.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x101.constructor.prototype,
+  "object",
+  'The value of `typeof x101.constructor.prototype` is expected to be "object"'
+);
 
 var x102 = new Date(2099, 11, 31, 23);
-if (!Date.prototype.isPrototypeOf(x102)) {
-  throw new Test262Error('#10.2: Date.prototype.isPrototypeOf(x102)');
-}
+assert(Date.prototype.isPrototypeOf(x102), 'Date.prototype.isPrototypeOf(x102) must return true');
 
 var x103 = new Date(2099, 11, 31, 23);
-if (Date.prototype !== x103.constructor.prototype) {
-  throw new Test262Error("#10.3: Date.prototype === x103.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x103.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x103.constructor.prototype'
+);
 
 var x111 = new Date(2099, 12, 1, 0);
-if (typeof x111.constructor.prototype !== "object") {
-  throw new Test262Error("#11.1: typeof x111.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x111.constructor.prototype,
+  "object",
+  'The value of `typeof x111.constructor.prototype` is expected to be "object"'
+);
 
 var x112 = new Date(2099, 12, 1, 0);
-if (!Date.prototype.isPrototypeOf(x112)) {
-  throw new Test262Error('#11.2: Date.prototype.isPrototypeOf(x112)');
-}
+assert(Date.prototype.isPrototypeOf(x112), 'Date.prototype.isPrototypeOf(x112) must return true');
 
 var x113 = new Date(2099, 12, 1, 0);
-if (Date.prototype !== x113.constructor.prototype) {
-  throw new Test262Error("#11.3: Date.prototype === x113.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x113.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x113.constructor.prototype'
+);
 
 var x121 = new Date(2100, 0, 1, 0);
-if (typeof x121.constructor.prototype !== "object") {
-  throw new Test262Error("#12.1: typeof x121.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x121.constructor.prototype,
+  "object",
+  'The value of `typeof x121.constructor.prototype` is expected to be "object"'
+);
 
 var x122 = new Date(2100, 0, 1, 0);
-if (!Date.prototype.isPrototypeOf(x122)) {
-  throw new Test262Error('#12.2: Date.prototype.isPrototypeOf(x122)');
-}
+assert(Date.prototype.isPrototypeOf(x122), 'Date.prototype.isPrototypeOf(x122) must return true');
 
 var x123 = new Date(2100, 0, 1, 0);
-if (Date.prototype !== x123.constructor.prototype) {
-  throw new Test262Error("#12.3: Date.prototype === x123.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x123.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x123.constructor.prototype'
+);

test/built-ins/Date/S15.9.3.1_A2_T4.js

@@ -11,181 +11,229 @@ description: 5 arguments, (year, month, date, hours, minutes)
 ---*/
 
 var x11 = new Date(1899, 11, 31, 23, 59);
-if (typeof x11.constructor.prototype !== "object") {
-  throw new Test262Error("#1.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x11.constructor.prototype,
+  "object",
+  'The value of `typeof x11.constructor.prototype` is expected to be "object"'
+);
 
 var x12 = new Date(1899, 11, 31, 23, 59);
-if (!Date.prototype.isPrototypeOf(x12)) {
-  throw new Test262Error('#1.2: Date.prototype.isPrototypeOf(x12)');
-}
+assert(Date.prototype.isPrototypeOf(x12), 'Date.prototype.isPrototypeOf(x12) must return true');
 
 var x13 = new Date(1899, 11, 31, 23, 59);
-if (Date.prototype !== x13.constructor.prototype) {
-  throw new Test262Error("#1.3: Date.prototype === x13.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x13.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x13.constructor.prototype'
+);
 
 var x21 = new Date(1899, 12, 1, 0, 0);
-if (typeof x21.constructor.prototype !== "object") {
-  throw new Test262Error("#2.1: typeof x21.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x21.constructor.prototype,
+  "object",
+  'The value of `typeof x21.constructor.prototype` is expected to be "object"'
+);
 
 var x22 = new Date(1899, 12, 1, 0, 0);
-if (!Date.prototype.isPrototypeOf(x22)) {
-  throw new Test262Error('#2.2: Date.prototype.isPrototypeOf(x22)');
-}
+assert(Date.prototype.isPrototypeOf(x22), 'Date.prototype.isPrototypeOf(x22) must return true');
 
 var x23 = new Date(1899, 12, 1, 0, 0);
-if (Date.prototype !== x23.constructor.prototype) {
-  throw new Test262Error("#2.3: Date.prototype === x23.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x23.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x23.constructor.prototype'
+);
 
 var x31 = new Date(1900, 0, 1, 0, 0);
-if (typeof x31.constructor.prototype !== "object") {
-  throw new Test262Error("#3.1: typeof x31.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x31.constructor.prototype,
+  "object",
+  'The value of `typeof x31.constructor.prototype` is expected to be "object"'
+);
 
 var x32 = new Date(1900, 0, 1, 0, 0);
-if (!Date.prototype.isPrototypeOf(x32)) {
-  throw new Test262Error('#3.2: Date.prototype.isPrototypeOf(x32)');
-}
+assert(Date.prototype.isPrototypeOf(x32), 'Date.prototype.isPrototypeOf(x32) must return true');
 
 var x33 = new Date(1900, 0, 1, 0, 0);
-if (Date.prototype !== x33.constructor.prototype) {
-  throw new Test262Error("#3.3: Date.prototype === x33.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x33.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x33.constructor.prototype'
+);
 
 var x41 = new Date(1969, 11, 31, 23, 59);
-if (typeof x41.constructor.prototype !== "object") {
-  throw new Test262Error("#4.1: typeof x41.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x41.constructor.prototype,
+  "object",
+  'The value of `typeof x41.constructor.prototype` is expected to be "object"'
+);
 
 var x42 = new Date(1969, 11, 31, 23, 59);
-if (!Date.prototype.isPrototypeOf(x42)) {
-  throw new Test262Error('#4.2: Date.prototype.isPrototypeOf(x42)');
-}
+assert(Date.prototype.isPrototypeOf(x42), 'Date.prototype.isPrototypeOf(x42) must return true');
 
 var x43 = new Date(1969, 11, 31, 23, 59);
-if (Date.prototype !== x43.constructor.prototype) {
-  throw new Test262Error("#4.3: Date.prototype === x43.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x43.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x43.constructor.prototype'
+);
 
 var x51 = new Date(1969, 12, 1, 0, 0);
-if (typeof x51.constructor.prototype !== "object") {
-  throw new Test262Error("#5.1: typeof x51.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x51.constructor.prototype,
+  "object",
+  'The value of `typeof x51.constructor.prototype` is expected to be "object"'
+);
 
 var x52 = new Date(1969, 12, 1, 0, 0);
-if (!Date.prototype.isPrototypeOf(x52)) {
-  throw new Test262Error('#5.2: Date.prototype.isPrototypeOf(x52)');
-}
+assert(Date.prototype.isPrototypeOf(x52), 'Date.prototype.isPrototypeOf(x52) must return true');
 
 var x53 = new Date(1969, 12, 1, 0, 0);
-if (Date.prototype !== x53.constructor.prototype) {
-  throw new Test262Error("#5.3: Date.prototype === x53.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x53.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x53.constructor.prototype'
+);
 
 var x61 = new Date(1970, 0, 1, 0, 0);
-if (typeof x61.constructor.prototype !== "object") {
-  throw new Test262Error("#6.1: typeof x61.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x61.constructor.prototype,
+  "object",
+  'The value of `typeof x61.constructor.prototype` is expected to be "object"'
+);
 
 var x62 = new Date(1970, 0, 1, 0, 0);
-if (!Date.prototype.isPrototypeOf(x62)) {
-  throw new Test262Error('#6.2: Date.prototype.isPrototypeOf(x62)');
-}
+assert(Date.prototype.isPrototypeOf(x62), 'Date.prototype.isPrototypeOf(x62) must return true');
 
 var x63 = new Date(1970, 0, 1, 0, 0);
-if (Date.prototype !== x63.constructor.prototype) {
-  throw new Test262Error("#6.3: Date.prototype === x63.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x63.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x63.constructor.prototype'
+);
 
 var x71 = new Date(1999, 11, 31, 23, 59);
-if (typeof x71.constructor.prototype !== "object") {
-  throw new Test262Error("#7.1: typeof x71.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x71.constructor.prototype,
+  "object",
+  'The value of `typeof x71.constructor.prototype` is expected to be "object"'
+);
 
 var x72 = new Date(1999, 11, 31, 23, 59);
-if (!Date.prototype.isPrototypeOf(x72)) {
-  throw new Test262Error('#7.2: Date.prototype.isPrototypeOf(x72)');
-}
+assert(Date.prototype.isPrototypeOf(x72), 'Date.prototype.isPrototypeOf(x72) must return true');
 
 var x73 = new Date(1999, 11, 31, 23, 59);
-if (Date.prototype !== x73.constructor.prototype) {
-  throw new Test262Error("#7.3: Date.prototype === x73.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x73.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x73.constructor.prototype'
+);
 
 var x81 = new Date(1999, 12, 1, 0, 0);
-if (typeof x81.constructor.prototype !== "object") {
-  throw new Test262Error("#8.1: typeof x81.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x81.constructor.prototype,
+  "object",
+  'The value of `typeof x81.constructor.prototype` is expected to be "object"'
+);
 
 var x82 = new Date(1999, 12, 1, 0, 0);
-if (!Date.prototype.isPrototypeOf(x82)) {
-  throw new Test262Error('#8.2: Date.prototype.isPrototypeOf(x82)');
-}
+assert(Date.prototype.isPrototypeOf(x82), 'Date.prototype.isPrototypeOf(x82) must return true');
 
 var x83 = new Date(1999, 12, 1, 0, 0);
-if (Date.prototype !== x83.constructor.prototype) {
-  throw new Test262Error("#8.3: Date.prototype === x83.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x83.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x83.constructor.prototype'
+);
 
 var x91 = new Date(2000, 0, 1, 0, 0);
-if (typeof x91.constructor.prototype !== "object") {
-  throw new Test262Error("#9.1: typeof x91.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x91.constructor.prototype,
+  "object",
+  'The value of `typeof x91.constructor.prototype` is expected to be "object"'
+);
 
 var x92 = new Date(2000, 0, 1, 0, 0);
-if (!Date.prototype.isPrototypeOf(x92)) {
-  throw new Test262Error('#9.2: Date.prototype.isPrototypeOf(x92)');
-}
+assert(Date.prototype.isPrototypeOf(x92), 'Date.prototype.isPrototypeOf(x92) must return true');
 
 var x93 = new Date(2000, 0, 1, 0, 0);
-if (Date.prototype !== x93.constructor.prototype) {
-  throw new Test262Error("#9.3: Date.prototype === x93.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x93.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x93.constructor.prototype'
+);
 
 var x101 = new Date(2099, 11, 31, 23, 59);
-if (typeof x101.constructor.prototype !== "object") {
-  throw new Test262Error("#10.1: typeof x101.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x101.constructor.prototype,
+  "object",
+  'The value of `typeof x101.constructor.prototype` is expected to be "object"'
+);
 
 var x102 = new Date(2099, 11, 31, 23, 59);
-if (!Date.prototype.isPrototypeOf(x102)) {
-  throw new Test262Error('#10.2: Date.prototype.isPrototypeOf(x102)');
-}
+assert(Date.prototype.isPrototypeOf(x102), 'Date.prototype.isPrototypeOf(x102) must return true');
 
 var x103 = new Date(2099, 11, 31, 23, 59);
-if (Date.prototype !== x103.constructor.prototype) {
-  throw new Test262Error("#10.3: Date.prototype === x103.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x103.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x103.constructor.prototype'
+);
 
 var x111 = new Date(2099, 12, 1, 0, 0);
-if (typeof x111.constructor.prototype !== "object") {
-  throw new Test262Error("#11.1: typeof x111.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x111.constructor.prototype,
+  "object",
+  'The value of `typeof x111.constructor.prototype` is expected to be "object"'
+);
 
 var x112 = new Date(2099, 12, 1, 0, 0);
-if (!Date.prototype.isPrototypeOf(x112)) {
-  throw new Test262Error('#11.2: Date.prototype.isPrototypeOf(x112)');
-}
+assert(Date.prototype.isPrototypeOf(x112), 'Date.prototype.isPrototypeOf(x112) must return true');
 
 var x113 = new Date(2099, 12, 1, 0, 0);
-if (Date.prototype !== x113.constructor.prototype) {
-  throw new Test262Error("#11.3: Date.prototype === x113.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x113.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x113.constructor.prototype'
+);
 
 var x121 = new Date(2100, 0, 1, 0, 0);
-if (typeof x121.constructor.prototype !== "object") {
-  throw new Test262Error("#12.1: typeof x121.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x121.constructor.prototype,
+  "object",
+  'The value of `typeof x121.constructor.prototype` is expected to be "object"'
+);
 
 var x122 = new Date(2100, 0, 1, 0, 0);
-if (!Date.prototype.isPrototypeOf(x122)) {
-  throw new Test262Error('#12.2: Date.prototype.isPrototypeOf(x122)');
-}
+assert(Date.prototype.isPrototypeOf(x122), 'Date.prototype.isPrototypeOf(x122) must return true');
 
 var x123 = new Date(2100, 0, 1, 0, 0);
-if (Date.prototype !== x123.constructor.prototype) {
-  throw new Test262Error("#12.3: Date.prototype === x123.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x123.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x123.constructor.prototype'
+);

test/built-ins/Date/S15.9.3.1_A2_T5.js

@@ -11,181 +11,229 @@ description: 6 arguments, (year, month, date, hours, minutes, seconds)
 ---*/
 
 var x11 = new Date(1899, 11, 31, 23, 59, 59);
-if (typeof x11.constructor.prototype !== "object") {
-  throw new Test262Error("#1.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x11.constructor.prototype,
+  "object",
+  'The value of `typeof x11.constructor.prototype` is expected to be "object"'
+);
 
 var x12 = new Date(1899, 11, 31, 23, 59, 59);
-if (!Date.prototype.isPrototypeOf(x12)) {
-  throw new Test262Error('#1.2: Date.prototype.isPrototypeOf(x12)');
-}
+assert(Date.prototype.isPrototypeOf(x12), 'Date.prototype.isPrototypeOf(x12) must return true');
 
 var x13 = new Date(1899, 11, 31, 23, 59, 59);
-if (Date.prototype !== x13.constructor.prototype) {
-  throw new Test262Error("#1.3: Date.prototype === x13.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x13.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x13.constructor.prototype'
+);
 
 var x21 = new Date(1899, 12, 1, 0, 0, 0);
-if (typeof x21.constructor.prototype !== "object") {
-  throw new Test262Error("#2.1: typeof x21.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x21.constructor.prototype,
+  "object",
+  'The value of `typeof x21.constructor.prototype` is expected to be "object"'
+);
 
 var x22 = new Date(1899, 12, 1, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x22)) {
-  throw new Test262Error('#2.2: Date.prototype.isPrototypeOf(x22)');
-}
+assert(Date.prototype.isPrototypeOf(x22), 'Date.prototype.isPrototypeOf(x22) must return true');
 
 var x23 = new Date(1899, 12, 1, 0, 0, 0);
-if (Date.prototype !== x23.constructor.prototype) {
-  throw new Test262Error("#2.3: Date.prototype === x23.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x23.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x23.constructor.prototype'
+);
 
 var x31 = new Date(1900, 0, 1, 0, 0, 0);
-if (typeof x31.constructor.prototype !== "object") {
-  throw new Test262Error("#3.1: typeof x31.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x31.constructor.prototype,
+  "object",
+  'The value of `typeof x31.constructor.prototype` is expected to be "object"'
+);
 
 var x32 = new Date(1900, 0, 1, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x32)) {
-  throw new Test262Error('#3.2: Date.prototype.isPrototypeOf(x32)');
-}
+assert(Date.prototype.isPrototypeOf(x32), 'Date.prototype.isPrototypeOf(x32) must return true');
 
 var x33 = new Date(1900, 0, 1, 0, 0, 0);
-if (Date.prototype !== x33.constructor.prototype) {
-  throw new Test262Error("#3.3: Date.prototype === x33.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x33.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x33.constructor.prototype'
+);
 
 var x41 = new Date(1969, 11, 31, 23, 59, 59);
-if (typeof x41.constructor.prototype !== "object") {
-  throw new Test262Error("#4.1: typeof x41.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x41.constructor.prototype,
+  "object",
+  'The value of `typeof x41.constructor.prototype` is expected to be "object"'
+);
 
 var x42 = new Date(1969, 11, 31, 23, 59, 59);
-if (!Date.prototype.isPrototypeOf(x42)) {
-  throw new Test262Error('#4.2: Date.prototype.isPrototypeOf(x42)');
-}
+assert(Date.prototype.isPrototypeOf(x42), 'Date.prototype.isPrototypeOf(x42) must return true');
 
 var x43 = new Date(1969, 11, 31, 23, 59, 59);
-if (Date.prototype !== x43.constructor.prototype) {
-  throw new Test262Error("#4.3: Date.prototype === x43.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x43.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x43.constructor.prototype'
+);
 
 var x51 = new Date(1969, 12, 1, 0, 0, 0);
-if (typeof x51.constructor.prototype !== "object") {
-  throw new Test262Error("#5.1: typeof x51.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x51.constructor.prototype,
+  "object",
+  'The value of `typeof x51.constructor.prototype` is expected to be "object"'
+);
 
 var x52 = new Date(1969, 12, 1, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x52)) {
-  throw new Test262Error('#5.2: Date.prototype.isPrototypeOf(x52)');
-}
+assert(Date.prototype.isPrototypeOf(x52), 'Date.prototype.isPrototypeOf(x52) must return true');
 
 var x53 = new Date(1969, 12, 1, 0, 0, 0);
-if (Date.prototype !== x53.constructor.prototype) {
-  throw new Test262Error("#5.3: Date.prototype === x53.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x53.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x53.constructor.prototype'
+);
 
 var x61 = new Date(1970, 0, 1, 0, 0, 0);
-if (typeof x61.constructor.prototype !== "object") {
-  throw new Test262Error("#6.1: typeof x61.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x61.constructor.prototype,
+  "object",
+  'The value of `typeof x61.constructor.prototype` is expected to be "object"'
+);
 
 var x62 = new Date(1970, 0, 1, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x62)) {
-  throw new Test262Error('#6.2: Date.prototype.isPrototypeOf(x62)');
-}
+assert(Date.prototype.isPrototypeOf(x62), 'Date.prototype.isPrototypeOf(x62) must return true');
 
 var x63 = new Date(1970, 0, 1, 0, 0, 0);
-if (Date.prototype !== x63.constructor.prototype) {
-  throw new Test262Error("#6.3: Date.prototype === x63.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x63.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x63.constructor.prototype'
+);
 
 var x71 = new Date(1999, 11, 31, 23, 59, 59);
-if (typeof x71.constructor.prototype !== "object") {
-  throw new Test262Error("#7.1: typeof x71.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x71.constructor.prototype,
+  "object",
+  'The value of `typeof x71.constructor.prototype` is expected to be "object"'
+);
 
 var x72 = new Date(1999, 11, 31, 23, 59, 59);
-if (!Date.prototype.isPrototypeOf(x72)) {
-  throw new Test262Error('#7.2: Date.prototype.isPrototypeOf(x72)');
-}
+assert(Date.prototype.isPrototypeOf(x72), 'Date.prototype.isPrototypeOf(x72) must return true');
 
 var x73 = new Date(1999, 11, 31, 23, 59, 59);
-if (Date.prototype !== x73.constructor.prototype) {
-  throw new Test262Error("#7.3: Date.prototype === x73.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x73.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x73.constructor.prototype'
+);
 
 var x81 = new Date(1999, 12, 1, 0, 0, 0);
-if (typeof x81.constructor.prototype !== "object") {
-  throw new Test262Error("#8.1: typeof x81.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x81.constructor.prototype,
+  "object",
+  'The value of `typeof x81.constructor.prototype` is expected to be "object"'
+);
 
 var x82 = new Date(1999, 12, 1, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x82)) {
-  throw new Test262Error('#8.2: Date.prototype.isPrototypeOf(x82)');
-}
+assert(Date.prototype.isPrototypeOf(x82), 'Date.prototype.isPrototypeOf(x82) must return true');
 
 var x83 = new Date(1999, 12, 1, 0, 0, 0);
-if (Date.prototype !== x83.constructor.prototype) {
-  throw new Test262Error("#8.3: Date.prototype === x83.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x83.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x83.constructor.prototype'
+);
 
 var x91 = new Date(2000, 0, 1, 0, 0, 0);
-if (typeof x91.constructor.prototype !== "object") {
-  throw new Test262Error("#9.1: typeof x91.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x91.constructor.prototype,
+  "object",
+  'The value of `typeof x91.constructor.prototype` is expected to be "object"'
+);
 
 var x92 = new Date(2000, 0, 1, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x92)) {
-  throw new Test262Error('#9.2: Date.prototype.isPrototypeOf(x92)');
-}
+assert(Date.prototype.isPrototypeOf(x92), 'Date.prototype.isPrototypeOf(x92) must return true');
 
 var x93 = new Date(2000, 0, 1, 0, 0, 0);
-if (Date.prototype !== x93.constructor.prototype) {
-  throw new Test262Error("#9.3: Date.prototype === x93.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x93.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x93.constructor.prototype'
+);
 
 var x101 = new Date(2099, 11, 31, 23, 59, 59);
-if (typeof x101.constructor.prototype !== "object") {
-  throw new Test262Error("#10.1: typeof x101.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x101.constructor.prototype,
+  "object",
+  'The value of `typeof x101.constructor.prototype` is expected to be "object"'
+);
 
 var x102 = new Date(2099, 11, 31, 23, 59, 59);
-if (!Date.prototype.isPrototypeOf(x102)) {
-  throw new Test262Error('#10.2: Date.prototype.isPrototypeOf(x102)');
-}
+assert(Date.prototype.isPrototypeOf(x102), 'Date.prototype.isPrototypeOf(x102) must return true');
 
 var x103 = new Date(2099, 11, 31, 23, 59, 59);
-if (Date.prototype !== x103.constructor.prototype) {
-  throw new Test262Error("#10.3: Date.prototype === x103.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x103.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x103.constructor.prototype'
+);
 
 var x111 = new Date(2099, 12, 1, 0, 0, 0);
-if (typeof x111.constructor.prototype !== "object") {
-  throw new Test262Error("#11.1: typeof x111.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x111.constructor.prototype,
+  "object",
+  'The value of `typeof x111.constructor.prototype` is expected to be "object"'
+);
 
 var x112 = new Date(2099, 12, 1, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x112)) {
-  throw new Test262Error('#11.2: Date.prototype.isPrototypeOf(x112)');
-}
+assert(Date.prototype.isPrototypeOf(x112), 'Date.prototype.isPrototypeOf(x112) must return true');
 
 var x113 = new Date(2099, 12, 1, 0, 0, 0);
-if (Date.prototype !== x113.constructor.prototype) {
-  throw new Test262Error("#11.3: Date.prototype === x113.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x113.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x113.constructor.prototype'
+);
 
 var x121 = new Date(2100, 0, 1, 0, 0, 0);
-if (typeof x121.constructor.prototype !== "object") {
-  throw new Test262Error("#12.1: typeof x121.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x121.constructor.prototype,
+  "object",
+  'The value of `typeof x121.constructor.prototype` is expected to be "object"'
+);
 
 var x122 = new Date(2100, 0, 1, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x122)) {
-  throw new Test262Error('#12.2: Date.prototype.isPrototypeOf(x122)');
-}
+assert(Date.prototype.isPrototypeOf(x122), 'Date.prototype.isPrototypeOf(x122) must return true');
 
 var x123 = new Date(2100, 0, 1, 0, 0, 0);
-if (Date.prototype !== x123.constructor.prototype) {
-  throw new Test262Error("#12.3: Date.prototype === x123.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x123.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x123.constructor.prototype'
+);

test/built-ins/Date/S15.9.3.1_A2_T6.js

@@ -11,181 +11,229 @@ description: 7 arguments, (year, month, date, hours, minutes, seconds, ms)
 ---*/
 
 var x11 = new Date(1899, 11, 31, 23, 59, 59, 999);
-if (typeof x11.constructor.prototype !== "object") {
-  throw new Test262Error("#1.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x11.constructor.prototype,
+  "object",
+  'The value of `typeof x11.constructor.prototype` is expected to be "object"'
+);
 
 var x12 = new Date(1899, 11, 31, 23, 59, 59, 999);
-if (!Date.prototype.isPrototypeOf(x12)) {
-  throw new Test262Error('#1.2: Date.prototype.isPrototypeOf(x12)');
-}
+assert(Date.prototype.isPrototypeOf(x12), 'Date.prototype.isPrototypeOf(x12) must return true');
 
 var x13 = new Date(1899, 11, 31, 23, 59, 59, 999);
-if (Date.prototype !== x13.constructor.prototype) {
-  throw new Test262Error("#1.3: Date.prototype === x13.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x13.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x13.constructor.prototype'
+);
 
 var x21 = new Date(1899, 12, 1, 0, 0, 0, 0);
-if (typeof x21.constructor.prototype !== "object") {
-  throw new Test262Error("#2.1: typeof x21.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x21.constructor.prototype,
+  "object",
+  'The value of `typeof x21.constructor.prototype` is expected to be "object"'
+);
 
 var x22 = new Date(1899, 12, 1, 0, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x22)) {
-  throw new Test262Error('#2.2: Date.prototype.isPrototypeOf(x22)');
-}
+assert(Date.prototype.isPrototypeOf(x22), 'Date.prototype.isPrototypeOf(x22) must return true');
 
 var x23 = new Date(1899, 12, 1, 0, 0, 0, 0);
-if (Date.prototype !== x23.constructor.prototype) {
-  throw new Test262Error("#2.3: Date.prototype === x23.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x23.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x23.constructor.prototype'
+);
 
 var x31 = new Date(1900, 0, 1, 0, 0, 0, 0);
-if (typeof x31.constructor.prototype !== "object") {
-  throw new Test262Error("#3.1: typeof x31.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x31.constructor.prototype,
+  "object",
+  'The value of `typeof x31.constructor.prototype` is expected to be "object"'
+);
 
 var x32 = new Date(1900, 0, 1, 0, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x32)) {
-  throw new Test262Error('#3.2: Date.prototype.isPrototypeOf(x32)');
-}
+assert(Date.prototype.isPrototypeOf(x32), 'Date.prototype.isPrototypeOf(x32) must return true');
 
 var x33 = new Date(1900, 0, 1, 0, 0, 0, 0);
-if (Date.prototype !== x33.constructor.prototype) {
-  throw new Test262Error("#3.3: Date.prototype === x33.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x33.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x33.constructor.prototype'
+);
 
 var x41 = new Date(1969, 11, 31, 23, 59, 59, 999);
-if (typeof x41.constructor.prototype !== "object") {
-  throw new Test262Error("#4.1: typeof x41.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x41.constructor.prototype,
+  "object",
+  'The value of `typeof x41.constructor.prototype` is expected to be "object"'
+);
 
 var x42 = new Date(1969, 11, 31, 23, 59, 59, 999);
-if (!Date.prototype.isPrototypeOf(x42)) {
-  throw new Test262Error('#4.2: Date.prototype.isPrototypeOf(x42)');
-}
+assert(Date.prototype.isPrototypeOf(x42), 'Date.prototype.isPrototypeOf(x42) must return true');
 
 var x43 = new Date(1969, 11, 31, 23, 59, 59, 999);
-if (Date.prototype !== x43.constructor.prototype) {
-  throw new Test262Error("#4.3: Date.prototype === x43.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x43.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x43.constructor.prototype'
+);
 
 var x51 = new Date(1969, 12, 1, 0, 0, 0, 0);
-if (typeof x51.constructor.prototype !== "object") {
-  throw new Test262Error("#5.1: typeof x51.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x51.constructor.prototype,
+  "object",
+  'The value of `typeof x51.constructor.prototype` is expected to be "object"'
+);
 
 var x52 = new Date(1969, 12, 1, 0, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x52)) {
-  throw new Test262Error('#5.2: Date.prototype.isPrototypeOf(x52)');
-}
+assert(Date.prototype.isPrototypeOf(x52), 'Date.prototype.isPrototypeOf(x52) must return true');
 
 var x53 = new Date(1969, 12, 1, 0, 0, 0, 0);
-if (Date.prototype !== x53.constructor.prototype) {
-  throw new Test262Error("#5.3: Date.prototype === x53.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x53.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x53.constructor.prototype'
+);
 
 var x61 = new Date(1970, 0, 1, 0, 0, 0, 0);
-if (typeof x61.constructor.prototype !== "object") {
-  throw new Test262Error("#6.1: typeof x61.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x61.constructor.prototype,
+  "object",
+  'The value of `typeof x61.constructor.prototype` is expected to be "object"'
+);
 
 var x62 = new Date(1970, 0, 1, 0, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x62)) {
-  throw new Test262Error('#6.2: Date.prototype.isPrototypeOf(x62)');
-}
+assert(Date.prototype.isPrototypeOf(x62), 'Date.prototype.isPrototypeOf(x62) must return true');
 
 var x63 = new Date(1970, 0, 1, 0, 0, 0, 0);
-if (Date.prototype !== x63.constructor.prototype) {
-  throw new Test262Error("#6.3: Date.prototype === x63.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x63.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x63.constructor.prototype'
+);
 
 var x71 = new Date(1999, 11, 31, 23, 59, 59, 999);
-if (typeof x71.constructor.prototype !== "object") {
-  throw new Test262Error("#7.1: typeof x71.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x71.constructor.prototype,
+  "object",
+  'The value of `typeof x71.constructor.prototype` is expected to be "object"'
+);
 
 var x72 = new Date(1999, 11, 31, 23, 59, 59, 999);
-if (!Date.prototype.isPrototypeOf(x72)) {
-  throw new Test262Error('#7.2: Date.prototype.isPrototypeOf(x72)');
-}
+assert(Date.prototype.isPrototypeOf(x72), 'Date.prototype.isPrototypeOf(x72) must return true');
 
 var x73 = new Date(1999, 11, 31, 23, 59, 59, 999);
-if (Date.prototype !== x73.constructor.prototype) {
-  throw new Test262Error("#7.3: Date.prototype === x73.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x73.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x73.constructor.prototype'
+);
 
 var x81 = new Date(1999, 12, 1, 0, 0, 0, 0);
-if (typeof x81.constructor.prototype !== "object") {
-  throw new Test262Error("#8.1: typeof x81.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x81.constructor.prototype,
+  "object",
+  'The value of `typeof x81.constructor.prototype` is expected to be "object"'
+);
 
 var x82 = new Date(1999, 12, 1, 0, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x82)) {
-  throw new Test262Error('#8.2: Date.prototype.isPrototypeOf(x82)');
-}
+assert(Date.prototype.isPrototypeOf(x82), 'Date.prototype.isPrototypeOf(x82) must return true');
 
 var x83 = new Date(1999, 12, 1, 0, 0, 0, 0);
-if (Date.prototype !== x83.constructor.prototype) {
-  throw new Test262Error("#8.3: Date.prototype === x83.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x83.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x83.constructor.prototype'
+);
 
 var x91 = new Date(2000, 0, 1, 0, 0, 0, 0);
-if (typeof x91.constructor.prototype !== "object") {
-  throw new Test262Error("#9.1: typeof x91.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x91.constructor.prototype,
+  "object",
+  'The value of `typeof x91.constructor.prototype` is expected to be "object"'
+);
 
 var x92 = new Date(2000, 0, 1, 0, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x92)) {
-  throw new Test262Error('#9.2: Date.prototype.isPrototypeOf(x92)');
-}
+assert(Date.prototype.isPrototypeOf(x92), 'Date.prototype.isPrototypeOf(x92) must return true');
 
 var x93 = new Date(2000, 0, 1, 0, 0, 0, 0);
-if (Date.prototype !== x93.constructor.prototype) {
-  throw new Test262Error("#9.3: Date.prototype === x93.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x93.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x93.constructor.prototype'
+);
 
 var x101 = new Date(2099, 11, 31, 23, 59, 59, 999);
-if (typeof x101.constructor.prototype !== "object") {
-  throw new Test262Error("#10.1: typeof x101.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x101.constructor.prototype,
+  "object",
+  'The value of `typeof x101.constructor.prototype` is expected to be "object"'
+);
 
 var x102 = new Date(2099, 11, 31, 23, 59, 59, 999);
-if (!Date.prototype.isPrototypeOf(x102)) {
-  throw new Test262Error('#10.2: Date.prototype.isPrototypeOf(x102)');
-}
+assert(Date.prototype.isPrototypeOf(x102), 'Date.prototype.isPrototypeOf(x102) must return true');
 
 var x103 = new Date(2099, 11, 31, 23, 59, 59, 999);
-if (Date.prototype !== x103.constructor.prototype) {
-  throw new Test262Error("#10.3: Date.prototype === x103.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x103.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x103.constructor.prototype'
+);
 
 var x111 = new Date(2099, 12, 1, 0, 0, 0, 0);
-if (typeof x111.constructor.prototype !== "object") {
-  throw new Test262Error("#11.1: typeof x111.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x111.constructor.prototype,
+  "object",
+  'The value of `typeof x111.constructor.prototype` is expected to be "object"'
+);
 
 var x112 = new Date(2099, 12, 1, 0, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x112)) {
-  throw new Test262Error('#11.2: Date.prototype.isPrototypeOf(x112)');
-}
+assert(Date.prototype.isPrototypeOf(x112), 'Date.prototype.isPrototypeOf(x112) must return true');
 
 var x113 = new Date(2099, 12, 1, 0, 0, 0, 0);
-if (Date.prototype !== x113.constructor.prototype) {
-  throw new Test262Error("#11.3: Date.prototype === x113.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x113.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x113.constructor.prototype'
+);
 
 var x121 = new Date(2100, 0, 1, 0, 0, 0, 0);
-if (typeof x121.constructor.prototype !== "object") {
-  throw new Test262Error("#12.1: typeof x121.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x121.constructor.prototype,
+  "object",
+  'The value of `typeof x121.constructor.prototype` is expected to be "object"'
+);
 
 var x122 = new Date(2100, 0, 1, 0, 0, 0, 0);
-if (!Date.prototype.isPrototypeOf(x122)) {
-  throw new Test262Error('#12.2: Date.prototype.isPrototypeOf(x122)');
-}
+assert(Date.prototype.isPrototypeOf(x122), 'Date.prototype.isPrototypeOf(x122) must return true');
 
 var x123 = new Date(2100, 0, 1, 0, 0, 0, 0);
-if (Date.prototype !== x123.constructor.prototype) {
-  throw new Test262Error("#12.3: Date.prototype === x123.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x123.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x123.constructor.prototype'
+);

test/built-ins/Date/S15.9.3.1_A3_T1.1.js

@@ -12,61 +12,97 @@ description: >
 ---*/
 
 var x1 = new Date(1899, 11);
-if (Object.prototype.toString.call(x1) !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x1),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 11)) must return "[object Date]"'
+);
 
 var x2 = new Date(1899, 12);
-if (Object.prototype.toString.call(x2) !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x2),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 12)) must return "[object Date]"'
+);
 
 var x3 = new Date(1900, 0);
-if (Object.prototype.toString.call(x3) !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x3),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1900, 0)) must return "[object Date]"'
+);
 
 var x4 = new Date(1969, 11);
-if (Object.prototype.toString.call(x4) !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x4),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 11)) must return "[object Date]"'
+);
 
 var x5 = new Date(1969, 12);
-if (Object.prototype.toString.call(x5) !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x5),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 12)) must return "[object Date]"'
+);
 
 var x6 = new Date(1970, 0);
-if (Object.prototype.toString.call(x6) !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x6),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1970, 0)) must return "[object Date]"'
+);
 
 var x7 = new Date(1999, 11);
-if (Object.prototype.toString.call(x7) !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x7),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 11)) must return "[object Date]"'
+);
 
 var x8 = new Date(1999, 12);
-if (Object.prototype.toString.call(x8) !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x8),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 12)) must return "[object Date]"'
+);
 
 var x9 = new Date(2000, 0);
-if (Object.prototype.toString.call(x9) !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x9),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2000, 0)) must return "[object Date]"'
+);
 
 var x10 = new Date(2099, 11);
-if (Object.prototype.toString.call(x10) !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x10),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 11)) must return "[object Date]"'
+);
 
 var x11 = new Date(2099, 12);
-if (Object.prototype.toString.call(x11) !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x11),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 12)) must return "[object Date]"'
+);
 
 var x12 = new Date(2100, 0);
-if (Object.prototype.toString.call(x12) !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x12),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2100, 0)) must return "[object Date]"'
+);

test/built-ins/Date/S15.9.3.1_A3_T1.2.js

@@ -14,61 +14,37 @@ description: >
 Date.prototype.toString = Object.prototype.toString;
 
 var x1 = new Date(1899, 11);
-if (x1.toString() !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x1.toString(), "[object Date]", 'x1.toString() must return "[object Date]"');
 
 var x2 = new Date(1899, 12);
-if (x2.toString() !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x2.toString(), "[object Date]", 'x2.toString() must return "[object Date]"');
 
 var x3 = new Date(1900, 0);
-if (x3.toString() !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x3.toString(), "[object Date]", 'x3.toString() must return "[object Date]"');
 
 var x4 = new Date(1969, 11);
-if (x4.toString() !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x4.toString(), "[object Date]", 'x4.toString() must return "[object Date]"');
 
 var x5 = new Date(1969, 12);
-if (x5.toString() !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x5.toString(), "[object Date]", 'x5.toString() must return "[object Date]"');
 
 var x6 = new Date(1970, 0);
-if (x6.toString() !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x6.toString(), "[object Date]", 'x6.toString() must return "[object Date]"');
 
 var x7 = new Date(1999, 11);
-if (x7.toString() !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x7.toString(), "[object Date]", 'x7.toString() must return "[object Date]"');
 
 var x8 = new Date(1999, 12);
-if (x8.toString() !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x8.toString(), "[object Date]", 'x8.toString() must return "[object Date]"');
 
 var x9 = new Date(2000, 0);
-if (x9.toString() !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x9.toString(), "[object Date]", 'x9.toString() must return "[object Date]"');
 
 var x10 = new Date(2099, 11);
-if (x10.toString() !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x10.toString(), "[object Date]", 'x10.toString() must return "[object Date]"');
 
 var x11 = new Date(2099, 12);
-if (x11.toString() !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x11.toString(), "[object Date]", 'x11.toString() must return "[object Date]"');
 
 var x12 = new Date(2100, 0);
-if (x12.toString() !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x12.toString(), "[object Date]", 'x12.toString() must return "[object Date]"');

test/built-ins/Date/S15.9.3.1_A3_T2.1.js

@@ -12,61 +12,97 @@ description: >
 ---*/
 
 var x1 = new Date(1899, 11, 31);
-if (Object.prototype.toString.call(x1) !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x1),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 11, 31)) must return "[object Date]"'
+);
 
 var x2 = new Date(1899, 12, 1);
-if (Object.prototype.toString.call(x2) !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x2),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 12, 1)) must return "[object Date]"'
+);
 
 var x3 = new Date(1900, 0, 1);
-if (Object.prototype.toString.call(x3) !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x3),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1900, 0, 1)) must return "[object Date]"'
+);
 
 var x4 = new Date(1969, 11, 31);
-if (Object.prototype.toString.call(x4) !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x4),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 11, 31)) must return "[object Date]"'
+);
 
 var x5 = new Date(1969, 12, 1);
-if (Object.prototype.toString.call(x5) !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x5),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 12, 1)) must return "[object Date]"'
+);
 
 var x6 = new Date(1970, 0, 1);
-if (Object.prototype.toString.call(x6) !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x6),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1970, 0, 1)) must return "[object Date]"'
+);
 
 var x7 = new Date(1999, 11, 31);
-if (Object.prototype.toString.call(x7) !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x7),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 11, 31)) must return "[object Date]"'
+);
 
 var x8 = new Date(1999, 12, 1);
-if (Object.prototype.toString.call(x8) !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x8),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 12, 1)) must return "[object Date]"'
+);
 
 var x9 = new Date(2000, 0, 1);
-if (Object.prototype.toString.call(x9) !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x9),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2000, 0, 1)) must return "[object Date]"'
+);
 
 var x10 = new Date(2099, 11, 31);
-if (Object.prototype.toString.call(x10) !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x10),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 11, 31)) must return "[object Date]"'
+);
 
 var x11 = new Date(2099, 12, 1);
-if (Object.prototype.toString.call(x11) !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x11),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 12, 1)) must return "[object Date]"'
+);
 
 var x12 = new Date(2100, 0, 1);
-if (Object.prototype.toString.call(x12) !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x12),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2100, 0, 1)) must return "[object Date]"'
+);

test/built-ins/Date/S15.9.3.1_A3_T2.2.js

@@ -14,61 +14,37 @@ description: >
 Date.prototype.toString = Object.prototype.toString;
 
 var x1 = new Date(1899, 11, 31);
-if (x1.toString() !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x1.toString(), "[object Date]", 'x1.toString() must return "[object Date]"');
 
 var x2 = new Date(1899, 12, 1);
-if (x2.toString() !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x2.toString(), "[object Date]", 'x2.toString() must return "[object Date]"');
 
 var x3 = new Date(1900, 0, 1);
-if (x3.toString() !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x3.toString(), "[object Date]", 'x3.toString() must return "[object Date]"');
 
 var x4 = new Date(1969, 11, 31);
-if (x4.toString() !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x4.toString(), "[object Date]", 'x4.toString() must return "[object Date]"');
 
 var x5 = new Date(1969, 12, 1);
-if (x5.toString() !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x5.toString(), "[object Date]", 'x5.toString() must return "[object Date]"');
 
 var x6 = new Date(1970, 0, 1);
-if (x6.toString() !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x6.toString(), "[object Date]", 'x6.toString() must return "[object Date]"');
 
 var x7 = new Date(1999, 11, 31);
-if (x7.toString() !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x7.toString(), "[object Date]", 'x7.toString() must return "[object Date]"');
 
 var x8 = new Date(1999, 12, 1);
-if (x8.toString() !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x8.toString(), "[object Date]", 'x8.toString() must return "[object Date]"');
 
 var x9 = new Date(2000, 0, 1);
-if (x9.toString() !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x9.toString(), "[object Date]", 'x9.toString() must return "[object Date]"');
 
 var x10 = new Date(2099, 11, 31);
-if (x10.toString() !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x10.toString(), "[object Date]", 'x10.toString() must return "[object Date]"');
 
 var x11 = new Date(2099, 12, 1);
-if (x11.toString() !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x11.toString(), "[object Date]", 'x11.toString() must return "[object Date]"');
 
 var x12 = new Date(2100, 0, 1);
-if (x12.toString() !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x12.toString(), "[object Date]", 'x12.toString() must return "[object Date]"');

test/built-ins/Date/S15.9.3.1_A3_T3.1.js

@@ -12,61 +12,97 @@ description: >
 ---*/
 
 var x1 = new Date(1899, 11, 31, 23);
-if (Object.prototype.toString.call(x1) !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x1),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 11, 31, 23)) must return "[object Date]"'
+);
 
 var x2 = new Date(1899, 12, 1, 0);
-if (Object.prototype.toString.call(x2) !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x2),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 12, 1, 0)) must return "[object Date]"'
+);
 
 var x3 = new Date(1900, 0, 1, 0);
-if (Object.prototype.toString.call(x3) !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x3),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1900, 0, 1, 0)) must return "[object Date]"'
+);
 
 var x4 = new Date(1969, 11, 31, 23);
-if (Object.prototype.toString.call(x4) !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x4),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 11, 31, 23)) must return "[object Date]"'
+);
 
 var x5 = new Date(1969, 12, 1, 0);
-if (Object.prototype.toString.call(x5) !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x5),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 12, 1, 0)) must return "[object Date]"'
+);
 
 var x6 = new Date(1970, 0, 1, 0);
-if (Object.prototype.toString.call(x6) !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x6),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1970, 0, 1, 0)) must return "[object Date]"'
+);
 
 var x7 = new Date(1999, 11, 31, 23);
-if (Object.prototype.toString.call(x7) !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x7),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 11, 31, 23)) must return "[object Date]"'
+);
 
 var x8 = new Date(1999, 12, 1, 0);
-if (Object.prototype.toString.call(x8) !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x8),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 12, 1, 0)) must return "[object Date]"'
+);
 
 var x9 = new Date(2000, 0, 1, 0);
-if (Object.prototype.toString.call(x9) !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x9),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2000, 0, 1, 0)) must return "[object Date]"'
+);
 
 var x10 = new Date(2099, 11, 31, 23);
-if (Object.prototype.toString.call(x10) !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x10),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 11, 31, 23)) must return "[object Date]"'
+);
 
 var x11 = new Date(2099, 12, 1, 0);
-if (Object.prototype.toString.call(x11) !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x11),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 12, 1, 0)) must return "[object Date]"'
+);
 
 var x12 = new Date(2100, 0, 1, 0);
-if (Object.prototype.toString.call(x12) !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x12),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2100, 0, 1, 0)) must return "[object Date]"'
+);

test/built-ins/Date/S15.9.3.1_A3_T3.2.js

@@ -14,61 +14,37 @@ description: >
 Date.prototype.toString = Object.prototype.toString;
 
 var x1 = new Date(1899, 11, 31, 23);
-if (x1.toString() !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x1.toString(), "[object Date]", 'x1.toString() must return "[object Date]"');
 
 var x2 = new Date(1899, 12, 1, 0);
-if (x2.toString() !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x2.toString(), "[object Date]", 'x2.toString() must return "[object Date]"');
 
 var x3 = new Date(1900, 0, 1, 0);
-if (x3.toString() !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x3.toString(), "[object Date]", 'x3.toString() must return "[object Date]"');
 
 var x4 = new Date(1969, 11, 31, 23);
-if (x4.toString() !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x4.toString(), "[object Date]", 'x4.toString() must return "[object Date]"');
 
 var x5 = new Date(1969, 12, 1, 0);
-if (x5.toString() !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x5.toString(), "[object Date]", 'x5.toString() must return "[object Date]"');
 
 var x6 = new Date(1970, 0, 1, 0);
-if (x6.toString() !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x6.toString(), "[object Date]", 'x6.toString() must return "[object Date]"');
 
 var x7 = new Date(1999, 11, 31, 23);
-if (x7.toString() !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x7.toString(), "[object Date]", 'x7.toString() must return "[object Date]"');
 
 var x8 = new Date(1999, 12, 1, 0);
-if (x8.toString() !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x8.toString(), "[object Date]", 'x8.toString() must return "[object Date]"');
 
 var x9 = new Date(2000, 0, 1, 0);
-if (x9.toString() !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x9.toString(), "[object Date]", 'x9.toString() must return "[object Date]"');
 
 var x10 = new Date(2099, 11, 31, 23);
-if (x10.toString() !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x10.toString(), "[object Date]", 'x10.toString() must return "[object Date]"');
 
 var x11 = new Date(2099, 12, 1, 0);
-if (x11.toString() !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x11.toString(), "[object Date]", 'x11.toString() must return "[object Date]"');
 
 var x12 = new Date(2100, 0, 1, 0);
-if (x12.toString() !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x12.toString(), "[object Date]", 'x12.toString() must return "[object Date]"');

test/built-ins/Date/S15.9.3.1_A3_T4.1.js

@@ -12,61 +12,97 @@ description: >
 ---*/
 
 var x1 = new Date(1899, 11, 31, 23, 59);
-if (Object.prototype.toString.call(x1) !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x1),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 11, 31, 23, 59)) must return "[object Date]"'
+);
 
 var x2 = new Date(1899, 12, 1, 0, 0);
-if (Object.prototype.toString.call(x2) !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x2),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 12, 1, 0, 0)) must return "[object Date]"'
+);
 
 var x3 = new Date(1900, 0, 1, 0, 0);
-if (Object.prototype.toString.call(x3) !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x3),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1900, 0, 1, 0, 0)) must return "[object Date]"'
+);
 
 var x4 = new Date(1969, 11, 31, 23, 59);
-if (Object.prototype.toString.call(x4) !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x4),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 11, 31, 23, 59)) must return "[object Date]"'
+);
 
 var x5 = new Date(1969, 12, 1, 0, 0);
-if (Object.prototype.toString.call(x5) !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x5),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 12, 1, 0, 0)) must return "[object Date]"'
+);
 
 var x6 = new Date(1970, 0, 1, 0, 0);
-if (Object.prototype.toString.call(x6) !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x6),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1970, 0, 1, 0, 0)) must return "[object Date]"'
+);
 
 var x7 = new Date(1999, 11, 31, 23, 59);
-if (Object.prototype.toString.call(x7) !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x7),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 11, 31, 23, 59)) must return "[object Date]"'
+);
 
 var x8 = new Date(1999, 12, 1, 0, 0);
-if (Object.prototype.toString.call(x8) !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x8),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 12, 1, 0, 0)) must return "[object Date]"'
+);
 
 var x9 = new Date(2000, 0, 1, 0, 0);
-if (Object.prototype.toString.call(x9) !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x9),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2000, 0, 1, 0, 0)) must return "[object Date]"'
+);
 
 var x10 = new Date(2099, 11, 31, 23, 59);
-if (Object.prototype.toString.call(x10) !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x10),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 11, 31, 23, 59)) must return "[object Date]"'
+);
 
 var x11 = new Date(2099, 12, 1, 0, 0);
-if (Object.prototype.toString.call(x11) !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x11),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 12, 1, 0, 0)) must return "[object Date]"'
+);
 
 var x12 = new Date(2100, 0, 1, 0, 0);
-if (Object.prototype.toString.call(x12) !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x12),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2100, 0, 1, 0, 0)) must return "[object Date]"'
+);

test/built-ins/Date/S15.9.3.1_A3_T4.2.js

@@ -14,61 +14,37 @@ description: >
 Date.prototype.toString = Object.prototype.toString;
 
 var x1 = new Date(1899, 11, 31, 23, 59);
-if (x1.toString() !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x1.toString(), "[object Date]", 'x1.toString() must return "[object Date]"');
 
 var x2 = new Date(1899, 12, 1, 0, 0);
-if (x2.toString() !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x2.toString(), "[object Date]", 'x2.toString() must return "[object Date]"');
 
 var x3 = new Date(1900, 0, 1, 0, 0);
-if (x3.toString() !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x3.toString(), "[object Date]", 'x3.toString() must return "[object Date]"');
 
 var x4 = new Date(1969, 11, 31, 23, 59);
-if (x4.toString() !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x4.toString(), "[object Date]", 'x4.toString() must return "[object Date]"');
 
 var x5 = new Date(1969, 12, 1, 0, 0);
-if (x5.toString() !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x5.toString(), "[object Date]", 'x5.toString() must return "[object Date]"');
 
 var x6 = new Date(1970, 0, 1, 0, 0);
-if (x6.toString() !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x6.toString(), "[object Date]", 'x6.toString() must return "[object Date]"');
 
 var x7 = new Date(1999, 11, 31, 23, 59);
-if (x7.toString() !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x7.toString(), "[object Date]", 'x7.toString() must return "[object Date]"');
 
 var x8 = new Date(1999, 12, 1, 0, 0);
-if (x8.toString() !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x8.toString(), "[object Date]", 'x8.toString() must return "[object Date]"');
 
 var x9 = new Date(2000, 0, 1, 0, 0);
-if (x9.toString() !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x9.toString(), "[object Date]", 'x9.toString() must return "[object Date]"');
 
 var x10 = new Date(2099, 11, 31, 23, 59);
-if (x10.toString() !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x10.toString(), "[object Date]", 'x10.toString() must return "[object Date]"');
 
 var x11 = new Date(2099, 12, 1, 0, 0);
-if (x11.toString() !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x11.toString(), "[object Date]", 'x11.toString() must return "[object Date]"');
 
 var x12 = new Date(2100, 0, 1, 0, 0);
-if (x12.toString() !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x12.toString(), "[object Date]", 'x12.toString() must return "[object Date]"');

test/built-ins/Date/S15.9.3.1_A3_T5.1.js

@@ -10,61 +10,97 @@ description: 6 arguments, (year, month, date, hours, minutes, seconds)
 ---*/
 
 var x1 = new Date(1899, 11, 31, 23, 59, 59);
-if (Object.prototype.toString.call(x1) !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x1),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 11, 31, 23, 59, 59)) must return "[object Date]"'
+);
 
 var x2 = new Date(1899, 12, 1, 0, 0, 0);
-if (Object.prototype.toString.call(x2) !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x2),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 12, 1, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x3 = new Date(1900, 0, 1, 0, 0, 0);
-if (Object.prototype.toString.call(x3) !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x3),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1900, 0, 1, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x4 = new Date(1969, 11, 31, 23, 59, 59);
-if (Object.prototype.toString.call(x4) !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x4),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 11, 31, 23, 59, 59)) must return "[object Date]"'
+);
 
 var x5 = new Date(1969, 12, 1, 0, 0, 0);
-if (Object.prototype.toString.call(x5) !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x5),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 12, 1, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x6 = new Date(1970, 0, 1, 0, 0, 0);
-if (Object.prototype.toString.call(x6) !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x6),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1970, 0, 1, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x7 = new Date(1999, 11, 31, 23, 59, 59);
-if (Object.prototype.toString.call(x7) !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x7),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 11, 31, 23, 59, 59)) must return "[object Date]"'
+);
 
 var x8 = new Date(1999, 12, 1, 0, 0, 0);
-if (Object.prototype.toString.call(x8) !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x8),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 12, 1, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x9 = new Date(2000, 0, 1, 0, 0, 0);
-if (Object.prototype.toString.call(x9) !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x9),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2000, 0, 1, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x10 = new Date(2099, 11, 31, 23, 59, 59);
-if (Object.prototype.toString.call(x10) !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x10),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 11, 31, 23, 59, 59)) must return "[object Date]"'
+);
 
 var x11 = new Date(2099, 12, 1, 0, 0, 0);
-if (Object.prototype.toString.call(x11) !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x11),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 12, 1, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x12 = new Date(2100, 0, 1, 0, 0, 0);
-if (Object.prototype.toString.call(x12) !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x12),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2100, 0, 1, 0, 0, 0)) must return "[object Date]"'
+);

test/built-ins/Date/S15.9.3.1_A3_T5.2.js

@@ -14,61 +14,37 @@ description: >
 Date.prototype.toString = Object.prototype.toString;
 
 var x1 = new Date(1899, 11, 31, 23, 59, 59);
-if (x1.toString() !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x1.toString(), "[object Date]", 'x1.toString() must return "[object Date]"');
 
 var x2 = new Date(1899, 12, 1, 0, 0, 0);
-if (x2.toString() !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x2.toString(), "[object Date]", 'x2.toString() must return "[object Date]"');
 
 var x3 = new Date(1900, 0, 1, 0, 0, 0);
-if (x3.toString() !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x3.toString(), "[object Date]", 'x3.toString() must return "[object Date]"');
 
 var x4 = new Date(1969, 11, 31, 23, 59, 59);
-if (x4.toString() !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x4.toString(), "[object Date]", 'x4.toString() must return "[object Date]"');
 
 var x5 = new Date(1969, 12, 1, 0, 0, 0);
-if (x5.toString() !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x5.toString(), "[object Date]", 'x5.toString() must return "[object Date]"');
 
 var x6 = new Date(1970, 0, 1, 0, 0, 0);
-if (x6.toString() !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x6.toString(), "[object Date]", 'x6.toString() must return "[object Date]"');
 
 var x7 = new Date(1999, 11, 31, 23, 59, 59);
-if (x7.toString() !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x7.toString(), "[object Date]", 'x7.toString() must return "[object Date]"');
 
 var x8 = new Date(1999, 12, 1, 0, 0, 0);
-if (x8.toString() !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x8.toString(), "[object Date]", 'x8.toString() must return "[object Date]"');
 
 var x9 = new Date(2000, 0, 1, 0, 0, 0);
-if (x9.toString() !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x9.toString(), "[object Date]", 'x9.toString() must return "[object Date]"');
 
 var x10 = new Date(2099, 11, 31, 23, 59, 59);
-if (x10.toString() !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x10.toString(), "[object Date]", 'x10.toString() must return "[object Date]"');
 
 var x11 = new Date(2099, 12, 1, 0, 0, 0);
-if (x11.toString() !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x11.toString(), "[object Date]", 'x11.toString() must return "[object Date]"');
 
 var x12 = new Date(2100, 0, 1, 0, 0, 0);
-if (x12.toString() !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x12.toString(), "[object Date]", 'x12.toString() must return "[object Date]"');

test/built-ins/Date/S15.9.3.1_A3_T6.1.js

@@ -10,61 +10,97 @@ description: 7 arguments, (year, month, date, hours, minutes, seconds, ms)
 ---*/
 
 var x1 = new Date(1899, 11, 31, 23, 59, 59, 999);
-if (Object.prototype.toString.call(x1) !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x1),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 11, 31, 23, 59, 59, 999)) must return "[object Date]"'
+);
 
 var x2 = new Date(1899, 12, 1, 0, 0, 0, 0);
-if (Object.prototype.toString.call(x2) !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x2),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1899, 12, 1, 0, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x3 = new Date(1900, 0, 1, 0, 0, 0, 0);
-if (Object.prototype.toString.call(x3) !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x3),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1900, 0, 1, 0, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x4 = new Date(1969, 11, 31, 23, 59, 59, 999);
-if (Object.prototype.toString.call(x4) !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x4),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 11, 31, 23, 59, 59, 999)) must return "[object Date]"'
+);
 
 var x5 = new Date(1969, 12, 1, 0, 0, 0, 0);
-if (Object.prototype.toString.call(x5) !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x5),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1969, 12, 1, 0, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x6 = new Date(1970, 0, 1, 0, 0, 0, 0);
-if (Object.prototype.toString.call(x6) !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x6),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1970, 0, 1, 0, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x7 = new Date(1999, 11, 31, 23, 59, 59, 999);
-if (Object.prototype.toString.call(x7) !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x7),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 11, 31, 23, 59, 59, 999)) must return "[object Date]"'
+);
 
 var x8 = new Date(1999, 12, 1, 0, 0, 0, 0);
-if (Object.prototype.toString.call(x8) !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x8),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(1999, 12, 1, 0, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x9 = new Date(2000, 0, 1, 0, 0, 0, 0);
-if (Object.prototype.toString.call(x9) !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x9),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2000, 0, 1, 0, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x10 = new Date(2099, 11, 31, 23, 59, 59, 999);
-if (Object.prototype.toString.call(x10) !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x10),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 11, 31, 23, 59, 59, 999)) must return "[object Date]"'
+);
 
 var x11 = new Date(2099, 12, 1, 0, 0, 0, 0);
-if (Object.prototype.toString.call(x11) !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x11),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2099, 12, 1, 0, 0, 0, 0)) must return "[object Date]"'
+);
 
 var x12 = new Date(2100, 0, 1, 0, 0, 0, 0);
-if (Object.prototype.toString.call(x12) !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x12),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(2100, 0, 1, 0, 0, 0, 0)) must return "[object Date]"'
+);

test/built-ins/Date/S15.9.3.1_A3_T6.2.js

@@ -14,61 +14,37 @@ description: >
 Date.prototype.toString = Object.prototype.toString;
 
 var x1 = new Date(1899, 11, 31, 23, 59, 59, 999);
-if (x1.toString() !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x1.toString(), "[object Date]", 'x1.toString() must return "[object Date]"');
 
 var x2 = new Date(1899, 12, 1, 0, 0, 0, 0);
-if (x2.toString() !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x2.toString(), "[object Date]", 'x2.toString() must return "[object Date]"');
 
 var x3 = new Date(1900, 0, 1, 0, 0, 0, 0);
-if (x3.toString() !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x3.toString(), "[object Date]", 'x3.toString() must return "[object Date]"');
 
 var x4 = new Date(1969, 11, 31, 23, 59, 59, 999);
-if (x4.toString() !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x4.toString(), "[object Date]", 'x4.toString() must return "[object Date]"');
 
 var x5 = new Date(1969, 12, 1, 0, 0, 0, 0);
-if (x5.toString() !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x5.toString(), "[object Date]", 'x5.toString() must return "[object Date]"');
 
 var x6 = new Date(1970, 0, 1, 0, 0, 0, 0);
-if (x6.toString() !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x6.toString(), "[object Date]", 'x6.toString() must return "[object Date]"');
 
 var x7 = new Date(1999, 11, 31, 23, 59, 59, 999);
-if (x7.toString() !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x7.toString(), "[object Date]", 'x7.toString() must return "[object Date]"');
 
 var x8 = new Date(1999, 12, 1, 0, 0, 0, 0);
-if (x8.toString() !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x8.toString(), "[object Date]", 'x8.toString() must return "[object Date]"');
 
 var x9 = new Date(2000, 0, 1, 0, 0, 0, 0);
-if (x9.toString() !== "[object Date]") {
-  throw new Test262Error("#9: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x9.toString(), "[object Date]", 'x9.toString() must return "[object Date]"');
 
 var x10 = new Date(2099, 11, 31, 23, 59, 59, 999);
-if (x10.toString() !== "[object Date]") {
-  throw new Test262Error("#10: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x10.toString(), "[object Date]", 'x10.toString() must return "[object Date]"');
 
 var x11 = new Date(2099, 12, 1, 0, 0, 0, 0);
-if (x11.toString() !== "[object Date]") {
-  throw new Test262Error("#11: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x11.toString(), "[object Date]", 'x11.toString() must return "[object Date]"');
 
 var x12 = new Date(2100, 0, 1, 0, 0, 0, 0);
-if (x12.toString() !== "[object Date]") {
-  throw new Test262Error("#12: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x12.toString(), "[object Date]", 'x12.toString() must return "[object Date]"');

test/built-ins/Date/S15.9.3.1_A4_T0.js

@@ -0,0 +1,29 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The [[Value]] property of the newly constructed object
+    is set by following steps:
+    1. Call ToNumber(year)
+    2. Call ToNumber(month)
+    3. If date is supplied use ToNumber(date)
+    4. If hours is supplied use ToNumber(hours)
+    5. If minutes is supplied use ToNumber(minutes)
+    6. If seconds is supplied use ToNumber(seconds)
+    7. If ms is supplied use ToNumber(ms)
+esid: sec-date-year-month-date-hours-minutes-seconds-ms
+description: 1 argument (year)
+---*/
+
+function PoisonedValueOf(val) {
+  this.value = val;
+  this.valueOf = function() {
+    throw new Test262Error();
+  };
+  this.toString = function() {};
+}
+
+assert.throws(Test262Error, () => {
+  new Date(new PoisonedValueOf(1));
+}, '`new Date(new PoisonedValueOf(1))` throws a Test262Error exception');

test/built-ins/Date/S15.9.3.1_A4_T1.js

@@ -16,34 +16,18 @@ esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 2 arguments, (year, month)
 ---*/
 
-var myObj = function(val) {
+function PoisonedValueOf(val) {
   this.value = val;
   this.valueOf = function() {
-    throw "valueOf-" + this.value;
+    throw new Test262Error();
   };
-  this.toString = function() {
-    throw "toString-" + this.value;
-  };
-};
-
-//CHECK#1
-try {
-  var x1 = new Date(new myObj(1), new myObj(2));
-  throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-}
-catch (e) {
-  if (e !== "valueOf-1") {
-    throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-  }
+  this.toString = function() {};
 }
 
-//CHECK#2
-try {
-  var x2 = new Date(1, new myObj(2));
-  throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-}
-catch (e) {
-  if (e !== "valueOf-2") {
-    throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(new PoisonedValueOf(1), new PoisonedValueOf(2));
+}, '`new Date(new PoisonedValueOf(1), new PoisonedValueOf(2))` throws a Test262Error exception');
+
+assert.throws(Test262Error, () => {
+  new Date(1, new PoisonedValueOf(2));
+}, '`new Date(1, new PoisonedValueOf(2))` throws a Test262Error exception');

test/built-ins/Date/S15.9.3.1_A4_T2.js

@@ -16,45 +16,22 @@ esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 3 arguments, (year, month, date)
 ---*/
 
-var myObj = function(val) {
+function PoisonedValueOf(val) {
   this.value = val;
   this.valueOf = function() {
-    throw "valueOf-" + this.value;
+    throw new Test262Error();
   };
-  this.toString = function() {
-    throw "toString-" + this.value;
-  };
-};
-
-//CHECK#1
-try {
-  var x1 = new Date(new myObj(1), new myObj(2), new myObj(3));
-  throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-}
-catch (e) {
-  if (e !== "valueOf-1") {
-    throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-  }
+  this.toString = function() {};
 }
 
-//CHECK#2
-try {
-  var x2 = new Date(1, new myObj(2), new myObj(3));
-  throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-}
-catch (e) {
-  if (e !== "valueOf-2") {
-    throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3));
+}, '`new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3))` throws a Test262Error exception');
 
-//CHECK#3
-try {
-  var x3 = new Date(1, 2, new myObj(3));
-  throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-}
-catch (e) {
-  if (e !== "valueOf-3") {
-    throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3));
+}, '`new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3))` throws a Test262Error exception');
+
+assert.throws(Test262Error, () => {
+  new Date(1, 2, new PoisonedValueOf(3));
+}, '`new Date(1, 2, new PoisonedValueOf(3))` throws a Test262Error exception');

test/built-ins/Date/S15.9.3.1_A4_T3.js

@@ -16,56 +16,26 @@ esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 4 arguments, (year, month, date, hours)
 ---*/
 
-var myObj = function(val) {
+function PoisonedValueOf(val) {
   this.value = val;
   this.valueOf = function() {
-    throw "valueOf-" + this.value;
+    throw new Test262Error();
   };
-  this.toString = function() {
-    throw "toString-" + this.value;
-  };
-};
-
-//CHECK#1
-try {
-  var x1 = new Date(new myObj(1), new myObj(2), new myObj(3), new myObj(4));
-  throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-}
-catch (e) {
-  if (e !== "valueOf-1") {
-    throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-  }
+  this.toString = function() {};
 }
 
-//CHECK#2
-try {
-  var x2 = new Date(1, new myObj(2), new myObj(3), new myObj(4));
-  throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-}
-catch (e) {
-  if (e !== "valueOf-2") {
-    throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4));
+}, '`new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4))` throws a Test262Error exception');
 
-//CHECK#3
-try {
-  var x3 = new Date(1, 2, new myObj(3), new myObj(4));
-  throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-}
-catch (e) {
-  if (e !== "valueOf-3") {
-    throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4));
+}, '`new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4))` throws a Test262Error exception');
 
-//CHECK#4
-try {
-  var x4 = new Date(1, 2, 3, new myObj(4));
-  throw new Test262Error("#4: The 4th step is calling ToNumber(hours)");
-}
-catch (e) {
-  if (e !== "valueOf-4") {
-    throw new Test262Error("#4: The 4th step is calling ToNumber(hours)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, new PoisonedValueOf(3), new PoisonedValueOf(4));
+}, '`new Date(1, 2, new PoisonedValueOf(3), new PoisonedValueOf(4))` throws a Test262Error exception');
+
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, new PoisonedValueOf(4));
+}, '`new Date(1, 2, 3, new PoisonedValueOf(4))` throws a Test262Error exception');

test/built-ins/Date/S15.9.3.1_A4_T4.js

@@ -16,67 +16,30 @@ esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 5 arguments, (year, month, date, hours, minutes)
 ---*/
 
-var myObj = function(val) {
+function PoisonedValueOf(val) {
   this.value = val;
   this.valueOf = function() {
-    throw "valueOf-" + this.value;
+    throw new Test262Error();
   };
-  this.toString = function() {
-    throw "toString-" + this.value;
-  };
-};
-
-//CHECK#1
-try {
-  var x1 = new Date(new myObj(1), new myObj(2), new myObj(3), new myObj(4), new myObj(5));
-  throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-}
-catch (e) {
-  if (e !== "valueOf-1") {
-    throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-  }
+  this.toString = function() {};
 }
 
-//CHECK#2
-try {
-  var x2 = new Date(1, new myObj(2), new myObj(3), new myObj(4), new myObj(5));
-  throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-}
-catch (e) {
-  if (e !== "valueOf-2") {
-    throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5));
+}, '`new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5))` throws a Test262Error exception');
 
-//CHECK#3
-try {
-  var x3 = new Date(1, 2, new myObj(3), new myObj(4), new myObj(5));
-  throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-}
-catch (e) {
-  if (e !== "valueOf-3") {
-    throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5));
+}, '`new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5))` throws a Test262Error exception');
 
-//CHECK#4
-try {
-  var x4 = new Date(1, 2, 3, new myObj(4), new myObj(5));
-  throw new Test262Error("#4: The 4th step is calling ToNumber(hours)");
-}
-catch (e) {
-  if (e !== "valueOf-4") {
-    throw new Test262Error("#4: The 4th step is calling ToNumber(hours)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5));
+}, '`new Date(1, 2, new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5))` throws a Test262Error exception');
 
-//CHECK#5
-try {
-  var x5 = new Date(1, 2, 3, 4, new myObj(5));
-  throw new Test262Error("#5: The 5th step is calling ToNumber(minutes)");
-}
-catch (e) {
-  if (e !== "valueOf-5") {
-    throw new Test262Error("#5: The 5th step is calling ToNumber(minutes)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, new PoisonedValueOf(4), new PoisonedValueOf(5));
+}, '`new Date(1, 2, 3, new PoisonedValueOf(4), new PoisonedValueOf(5))` throws a Test262Error exception');
+
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, 4, new PoisonedValueOf(5));
+}, '`new Date(1, 2, 3, 4, new PoisonedValueOf(5))` throws a Test262Error exception');

test/built-ins/Date/S15.9.3.1_A4_T5.js

@@ -16,78 +16,34 @@ esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 6 arguments, (year, month, date, hours, minutes, seconds)
 ---*/
 
-var myObj = function(val) {
+function PoisonedValueOf(val) {
   this.value = val;
   this.valueOf = function() {
-    throw "valueOf-" + this.value;
+    throw new Test262Error();
   };
-  this.toString = function() {
-    throw "toString-" + this.value;
-  };
-};
-
-//CHECK#1
-try {
-  var x1 = new Date(new myObj(1), new myObj(2), new myObj(3), new myObj(4), new myObj(5), new myObj(6));
-  throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-}
-catch (e) {
-  if (e !== "valueOf-1") {
-    throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-  }
+  this.toString = function() {};
 }
 
-//CHECK#2
-try {
-  var x2 = new Date(1, new myObj(2), new myObj(3), new myObj(4), new myObj(5), new myObj(6));
-  throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-}
-catch (e) {
-  if (e !== "valueOf-2") {
-    throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6));
+}, '`new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6))` throws a Test262Error exception');
 
-//CHECK#3
-try {
-  var x3 = new Date(1, 2, new myObj(3), new myObj(4), new myObj(5), new myObj(6));
-  throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-}
-catch (e) {
-  if (e !== "valueOf-3") {
-    throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6));
+}, '`new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6))` throws a Test262Error exception');
 
-//CHECK#4
-try {
-  var x4 = new Date(1, 2, 3, new myObj(4), new myObj(5), new myObj(6));
-  throw new Test262Error("#4: The 4th step is calling ToNumber(hours)");
-}
-catch (e) {
-  if (e !== "valueOf-4") {
-    throw new Test262Error("#4: The 4th step is calling ToNumber(hours)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6));
+}, '`new Date(1, 2, new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6))` throws a Test262Error exception');
 
-//CHECK#5
-try {
-  var x5 = new Date(1, 2, 3, 4, new myObj(5), new myObj(6));
-  throw new Test262Error("#5: The 5th step is calling ToNumber(minutes)");
-}
-catch (e) {
-  if (e !== "valueOf-5") {
-    throw new Test262Error("#5: The 5th step is calling ToNumber(minutes)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6));
+}, '`new Date(1, 2, 3, new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6))` throws a Test262Error exception');
 
-//CHECK#6
-try {
-  var x6 = new Date(1, 2, 3, 4, 5, new myObj(6));
-  throw new Test262Error("#6: The 6th step is calling ToNumber(seconds)");
-}
-catch (e) {
-  if (e !== "valueOf-6") {
-    throw new Test262Error("#6: The 6th step is calling ToNumber(seconds)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, 4, new PoisonedValueOf(5), new PoisonedValueOf(6));
+}, '`new Date(1, 2, 3, 4, new PoisonedValueOf(5), new PoisonedValueOf(6))` throws a Test262Error exception');
+
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, 4, 5, new PoisonedValueOf(6));
+}, '`new Date(1, 2, 3, 4, 5, new PoisonedValueOf(6))` throws a Test262Error exception');

test/built-ins/Date/S15.9.3.1_A4_T6.js

@@ -16,89 +16,38 @@ esid: sec-date-year-month-date-hours-minutes-seconds-ms
 description: 7 arguments, (year, month, date, hours, minutes, seconds, ms)
 ---*/
 
-var myObj = function(val) {
+function PoisonedValueOf(val) {
   this.value = val;
   this.valueOf = function() {
-    throw "valueOf-" + this.value;
+    throw new Test262Error();
   };
-  this.toString = function() {
-    throw "toString-" + this.value;
-  };
-};
-
-//CHECK#1
-try {
-  var x1 = new Date(new myObj(1), new myObj(2), new myObj(3), new myObj(4), new myObj(5), new myObj(6), new myObj(7));
-  throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-}
-catch (e) {
-  if (e !== "valueOf-1") {
-    throw new Test262Error("#1: The 1st step is calling ToNumber(year)");
-  }
+  this.toString = function() {};
 }
 
-//CHECK#2
-try {
-  var x2 = new Date(1, new myObj(2), new myObj(3), new myObj(4), new myObj(5), new myObj(6), new myObj(7));
-  throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-}
-catch (e) {
-  if (e !== "valueOf-2") {
-    throw new Test262Error("#2: The 2nd step is calling ToNumber(month)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7));
+}, '`new Date(new PoisonedValueOf(1), new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7))` throws a Test262Error exception');
 
-//CHECK#3
-try {
-  var x3 = new Date(1, 2, new myObj(3), new myObj(4), new myObj(5), new myObj(6), new myObj(7));
-  throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-}
-catch (e) {
-  if (e !== "valueOf-3") {
-    throw new Test262Error("#3: The 3rd step is calling ToNumber(date)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7));
+}, '`new Date(1, new PoisonedValueOf(2), new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7))` throws a Test262Error exception');
 
-//CHECK#4
-try {
-  var x4 = new Date(1, 2, 3, new myObj(4), new myObj(5), new myObj(6), new myObj(7));
-  throw new Test262Error("#4: The 4th step is calling ToNumber(hours)");
-}
-catch (e) {
-  if (e !== "valueOf-4") {
-    throw new Test262Error("#4: The 4th step is calling ToNumber(hours)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7));
+}, '`new Date(1, 2, new PoisonedValueOf(3), new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7))` throws a Test262Error exception');
 
-//CHECK#5
-try {
-  var x5 = new Date(1, 2, 3, 4, new myObj(5), new myObj(6), new myObj(7));
-  throw new Test262Error("#5: The 5th step is calling ToNumber(minutes)");
-}
-catch (e) {
-  if (e !== "valueOf-5") {
-    throw new Test262Error("#5: The 5th step is calling ToNumber(minutes)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7));
+}, '`new Date(1, 2, 3, new PoisonedValueOf(4), new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7))` throws a Test262Error exception');
 
-//CHECK#6
-try {
-  var x6 = new Date(1, 2, 3, 4, 5, new myObj(6), new myObj(7));
-  throw new Test262Error("#6: The 6th step is calling ToNumber(seconds)");
-}
-catch (e) {
-  if (e !== "valueOf-6") {
-    throw new Test262Error("#6: The 6th step is calling ToNumber(seconds)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, 4, new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7));
+}, '`new Date(1, 2, 3, 4, new PoisonedValueOf(5), new PoisonedValueOf(6), new PoisonedValueOf(7))` throws a Test262Error exception');
 
-//CHECK#7
-try {
-  var x7 = new Date(1, 2, 3, 4, 5, 6, new myObj(7));
-  throw new Test262Error("#7: The 7th step is calling ToNumber(ms)");
-}
-catch (e) {
-  if (e !== "valueOf-7") {
-    throw new Test262Error("#7: The 7th step is calling ToNumber(ms)");
-  }
-}
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, 4, 5, new PoisonedValueOf(6), new PoisonedValueOf(7));
+}, '`new Date(1, 2, 3, 4, 5, new PoisonedValueOf(6), new PoisonedValueOf(7))` throws a Test262Error exception');
+
+assert.throws(Test262Error, () => {
+  new Date(1, 2, 3, 4, 5, 6, new PoisonedValueOf(7));
+}, '`new Date(1, 2, 3, 4, 5, 6, new PoisonedValueOf(7))` throws a Test262Error exception');

test/built-ins/Date/S15.9.3.1_A6_T1.js

@@ -15,37 +15,37 @@ function DateValue(year, month, date, hours, minutes, seconds, ms) {
 
 var x;
 x = DateValue(1899, 11);
-assert.sameValue(x, NaN, "(1899, 11)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1899, 12);
-assert.sameValue(x, NaN, "(1899, 12)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1900, 0);
-assert.sameValue(x, NaN, "(1900, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 11);
-assert.sameValue(x, NaN, "(1969, 11)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 12);
-assert.sameValue(x, NaN, "(1969, 12)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1970, 0);
-assert.sameValue(x, NaN, "(1970, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 11);
-assert.sameValue(x, NaN, "(1999, 11)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 12);
-assert.sameValue(x, NaN, "(1999, 12)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2000, 0);
-assert.sameValue(x, NaN, "(2000, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 11);
-assert.sameValue(x, NaN, "(2099, 11)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 12);
-assert.sameValue(x, NaN, "(2099, 12)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2100, 0);
-assert.sameValue(x, NaN, "(2100, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');

test/built-ins/Date/S15.9.3.1_A6_T2.js

@@ -15,37 +15,37 @@ function DateValue(year, month, date, hours, minutes, seconds, ms) {
 
 var x;
 x = DateValue(1899, 11, 31);
-assert.sameValue(x, NaN, "(1899, 11, 31)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1899, 12, 1);
-assert.sameValue(x, NaN, "(1899, 12, 1)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1900, 0, 1);
-assert.sameValue(x, NaN, "(1900, 0, 1)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 11, 31);
-assert.sameValue(x, NaN, "(1969, 11, 31)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 12, 1);
-assert.sameValue(x, NaN, "(1969, 12, 1)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1970, 0, 1);
-assert.sameValue(x, NaN, "(1970, 0, 1)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 11, 31);
-assert.sameValue(x, NaN, "(1999, 11, 31)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 12, 1);
-assert.sameValue(x, NaN, "(1999, 12, 1)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2000, 0, 1);
-assert.sameValue(x, NaN, "(2000, 0, 1)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 11, 31);
-assert.sameValue(x, NaN, "(2099, 11, 31)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 12, 1);
-assert.sameValue(x, NaN, "(2099, 12, 1)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2100, 0, 1);
-assert.sameValue(x, NaN, "(2100, 0, 1)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');

test/built-ins/Date/S15.9.3.1_A6_T3.js

@@ -15,37 +15,37 @@ function DateValue(year, month, date, hours, minutes, seconds, ms) {
 
 var x;
 x = DateValue(1899, 11, 31, 23);
-assert.sameValue(x, NaN, "(1899, 11, 31, 23)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1899, 12, 1, 0);
-assert.sameValue(x, NaN, "(1899, 12, 1, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1900, 0, 1, 0);
-assert.sameValue(x, NaN, "(1900, 0, 1, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 11, 31, 23);
-assert.sameValue(x, NaN, "(1969, 11, 31, 23)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 12, 1, 0);
-assert.sameValue(x, NaN, "(1969, 12, 1, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1970, 0, 1, 0);
-assert.sameValue(x, NaN, "(1970, 0, 1, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 11, 31, 23);
-assert.sameValue(x, NaN, "(1999, 11, 31, 23)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 12, 1, 0);
-assert.sameValue(x, NaN, "(1999, 12, 1, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2000, 0, 1, 0);
-assert.sameValue(x, NaN, "(2000, 0, 1, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 11, 31, 23);
-assert.sameValue(x, NaN, "(2099, 11, 31, 23)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 12, 1, 0);
-assert.sameValue(x, NaN, "(2099, 12, 1, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2100, 0, 1, 0);
-assert.sameValue(x, NaN, "(2100, 0, 1, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');

test/built-ins/Date/S15.9.3.1_A6_T4.js

@@ -15,37 +15,37 @@ function DateValue(year, month, date, hours, minutes, seconds, ms) {
 
 var x;
 x = DateValue(1899, 11, 31, 23, 59);
-assert.sameValue(x, NaN, "(1899, 11, 31, 23, 59)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1899, 12, 1, 0, 0);
-assert.sameValue(x, NaN, "(1899, 12, 1, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1900, 0, 1, 0, 0);
-assert.sameValue(x, NaN, "(1900, 0, 1, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 11, 31, 23, 59);
-assert.sameValue(x, NaN, "(1969, 11, 31, 23, 59)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 12, 1, 0, 0);
-assert.sameValue(x, NaN, "(1969, 12, 1, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1970, 0, 1, 0, 0);
-assert.sameValue(x, NaN, "(1970, 0, 1, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 11, 31, 23, 59);
-assert.sameValue(x, NaN, "(1999, 11, 31, 23, 59)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 12, 1, 0, 0);
-assert.sameValue(x, NaN, "(1999, 12, 1, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2000, 0, 1, 0, 0);
-assert.sameValue(x, NaN, "(2000, 0, 1, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 11, 31, 23, 59);
-assert.sameValue(x, NaN, "(2099, 11, 31, 23, 59)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 12, 1, 0, 0);
-assert.sameValue(x, NaN, "(2099, 12, 1, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2100, 0, 1, 0, 0);
-assert.sameValue(x, NaN, "(2100, 0, 1, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');

test/built-ins/Date/S15.9.3.1_A6_T5.js

@@ -15,37 +15,37 @@ function DateValue(year, month, date, hours, minutes, seconds, ms) {
 
 var x;
 x = DateValue(1899, 11, 31, 23, 59, 59);
-assert.sameValue(x, NaN, "(1899, 11, 31, 23, 59, 59)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1899, 12, 1, 0, 0, 0);
-assert.sameValue(x, NaN, "(1899, 12, 1, 0, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1900, 0, 1, 0, 0, 0);
-assert.sameValue(x, NaN, "(1900, 0, 1, 0, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 11, 31, 23, 59, 59);
-assert.sameValue(x, NaN, "(1969, 11, 31, 23, 59, 59)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1969, 12, 1, 0, 0, 0);
-assert.sameValue(x, NaN, "(1969, 12, 1, 0, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1970, 0, 1, 0, 0, 0);
-assert.sameValue(x, NaN, "(1970, 0, 1, 0, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 11, 31, 23, 59, 59);
-assert.sameValue(x, NaN, "(1999, 11, 31, 23, 59, 59)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(1999, 12, 1, 0, 0, 0);
-assert.sameValue(x, NaN, "(1999, 12, 1, 0, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2000, 0, 1, 0, 0, 0);
-assert.sameValue(x, NaN, "(2000, 0, 1, 0, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 11, 31, 23, 59, 59);
-assert.sameValue(x, NaN, "(2099, 11, 31, 23, 59, 59)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2099, 12, 1, 0, 0, 0);
-assert.sameValue(x, NaN, "(2099, 12, 1, 0, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');
 
 x = DateValue(2100, 0, 1, 0, 0, 0);
-assert.sameValue(x, NaN, "(2100, 0, 1, 0, 0, 0)");
+assert.sameValue(x, NaN, 'The value of x is expected to equal NaN');

test/built-ins/Date/S15.9.3.2_A1_T1.js

@@ -9,147 +9,130 @@ esid: sec-date-value
 description: Checking types of newly created objects and it values
 includes: [dateConstants.js]
 ---*/
+assert.sameValue(
+  typeof new Date(date_1899_end),
+  "object",
+  'The value of `typeof new Date(date_1899_end)` is expected to be "object"'
+);
 
-if (typeof new Date(date_1899_end) !== "object") {
-  throw new Test262Error("#1.1: typeof new Date(date_1899_end) === 'object'");
-}
-
-if (new Date(date_1899_end) === undefined) {
-  throw new Test262Error("#1.2: new Date(date_1899_end) === undefined");
-}
+assert.notSameValue(new Date(date_1899_end), undefined, 'new Date(date_1899_end) is expected to not equal ``undefined``');
 
 var x13 = new Date(date_1899_end);
-if (typeof x13 !== "object") {
-  throw new Test262Error("#1.3: typeof new Date(date_1899_end) !== 'object'");
-}
+assert.sameValue(typeof x13, "object", 'The value of `typeof x13` is expected to be "object"');
 
 var x14 = new Date(date_1899_end);
-if (x14 === undefined) {
-  throw new Test262Error("#1.4: new Date(date_1899_end) !== undefined");
-}
+assert.notSameValue(x14, undefined, 'The value of x14 is expected to not equal ``undefined``');
 
-if (typeof new Date(date_1900_start) !== "object") {
-  throw new Test262Error("#2.1: typeof new Date(date_1900_start) === 'object'");
-}
+assert.sameValue(
+  typeof new Date(date_1900_start),
+  "object",
+  'The value of `typeof new Date(date_1900_start)` is expected to be "object"'
+);
 
-if (new Date(date_1900_start) === undefined) {
-  throw new Test262Error("#2.2: new Date(date_1900_start) === undefined");
-}
+assert.notSameValue(
+  new Date(date_1900_start),
+  undefined,
+  'new Date(date_1900_start) is expected to not equal ``undefined``'
+);
 
 var x23 = new Date(date_1900_start);
-if (typeof x23 !== "object") {
-  throw new Test262Error("#2.3: typeof new Date(date_1900_start) !== 'object'");
-}
+assert.sameValue(typeof x23, "object", 'The value of `typeof x23` is expected to be "object"');
 
 var x24 = new Date(date_1900_start);
-if (x24 === undefined) {
-  throw new Test262Error("#2.4: new Date(date_1900_start) !== undefined");
-}
+assert.notSameValue(x24, undefined, 'The value of x24 is expected to not equal ``undefined``');
 
-if (typeof new Date(date_1969_end) !== "object") {
-  throw new Test262Error("#3.1: typeof new Date(date_1969_end) === 'object'");
-}
+assert.sameValue(
+  typeof new Date(date_1969_end),
+  "object",
+  'The value of `typeof new Date(date_1969_end)` is expected to be "object"'
+);
 
-if (new Date(date_1969_end) === undefined) {
-  throw new Test262Error("#3.2: new Date(date_1969_end) === undefined");
-}
+assert.notSameValue(new Date(date_1969_end), undefined, 'new Date(date_1969_end) is expected to not equal ``undefined``');
 
 var x33 = new Date(date_1969_end);
-if (typeof x33 !== "object") {
-  throw new Test262Error("#3.3: typeof new Date(date_1969_end) !== 'object'");
-}
+assert.sameValue(typeof x33, "object", 'The value of `typeof x33` is expected to be "object"');
 
 var x34 = new Date(date_1969_end);
-if (x34 === undefined) {
-  throw new Test262Error("#3.4: new Date(date_1969_end) !== undefined");
-}
+assert.notSameValue(x34, undefined, 'The value of x34 is expected to not equal ``undefined``');
 
-if (typeof new Date(date_1970_start) !== "object") {
-  throw new Test262Error("#4.1: typeof new Date(date_1970_start) === 'object'");
-}
+assert.sameValue(
+  typeof new Date(date_1970_start),
+  "object",
+  'The value of `typeof new Date(date_1970_start)` is expected to be "object"'
+);
 
-if (new Date(date_1970_start) === undefined) {
-  throw new Test262Error("#4.2: new Date(date_1970_start) === undefined");
-}
+assert.notSameValue(
+  new Date(date_1970_start),
+  undefined,
+  'new Date(date_1970_start) is expected to not equal ``undefined``'
+);
 
 var x43 = new Date(date_1970_start);
-if (typeof x43 !== "object") {
-  throw new Test262Error("#4.3: typeof new Date(date_1970_start) !== 'object'");
-}
+assert.sameValue(typeof x43, "object", 'The value of `typeof x43` is expected to be "object"');
 
 var x44 = new Date(date_1970_start);
-if (x44 === undefined) {
-  throw new Test262Error("#4.4: new Date(date_1970_start) !== undefined");
-}
+assert.notSameValue(x44, undefined, 'The value of x44 is expected to not equal ``undefined``');
 
-if (typeof new Date(date_1999_end) !== "object") {
-  throw new Test262Error("#5.1: typeof new Date(date_1999_end) === 'object'");
-}
+assert.sameValue(
+  typeof new Date(date_1999_end),
+  "object",
+  'The value of `typeof new Date(date_1999_end)` is expected to be "object"'
+);
 
-if (new Date(date_1999_end) === undefined) {
-  throw new Test262Error("#5.2: new Date(date_1999_end) === undefined");
-}
+assert.notSameValue(new Date(date_1999_end), undefined, 'new Date(date_1999_end) is expected to not equal ``undefined``');
 
 var x53 = new Date(date_1999_end);
-if (typeof x53 !== "object") {
-  throw new Test262Error("#5.3: typeof new Date(date_1999_end) !== 'object'");
-}
+assert.sameValue(typeof x53, "object", 'The value of `typeof x53` is expected to be "object"');
 
 var x54 = new Date(date_1999_end);
-if (x54 === undefined) {
-  throw new Test262Error("#5.4: new Date(date_1999_end) !== undefined");
-}
+assert.notSameValue(x54, undefined, 'The value of x54 is expected to not equal ``undefined``');
 
-if (typeof new Date(date_2000_start) !== "object") {
-  throw new Test262Error("#6.1: typeof new Date(date_2000_start) === 'object'");
-}
+assert.sameValue(
+  typeof new Date(date_2000_start),
+  "object",
+  'The value of `typeof new Date(date_2000_start)` is expected to be "object"'
+);
 
-if (new Date(date_2000_start) === undefined) {
-  throw new Test262Error("#6.2: new Date(date_2000_start) === undefined");
-}
+assert.notSameValue(
+  new Date(date_2000_start),
+  undefined,
+  'new Date(date_2000_start) is expected to not equal ``undefined``'
+);
 
 var x63 = new Date(date_2000_start);
-if (typeof x63 !== "object") {
-  throw new Test262Error("#6.3: typeof new Date(date_2000_start) !== 'object'");
-}
+assert.sameValue(typeof x63, "object", 'The value of `typeof x63` is expected to be "object"');
 
 var x64 = new Date(date_2000_start);
-if (x64 === undefined) {
-  throw new Test262Error("#6.4: new Date(date_2000_start) !== undefined");
-}
+assert.notSameValue(x64, undefined, 'The value of x64 is expected to not equal ``undefined``');
 
-if (typeof new Date(date_2099_end) !== "object") {
-  throw new Test262Error("#7.1: typeof new Date(date_2099_end) === 'object'");
-}
+assert.sameValue(
+  typeof new Date(date_2099_end),
+  "object",
+  'The value of `typeof new Date(date_2099_end)` is expected to be "object"'
+);
 
-if (new Date(date_2099_end) === undefined) {
-  throw new Test262Error("#7.2: new Date(date_2099_end) === undefined");
-}
+assert.notSameValue(new Date(date_2099_end), undefined, 'new Date(date_2099_end) is expected to not equal ``undefined``');
 
 var x73 = new Date(date_2099_end);
-if (typeof x73 !== "object") {
-  throw new Test262Error("#7.3: typeof new Date(date_2099_end) !== 'object'");
-}
+assert.sameValue(typeof x73, "object", 'The value of `typeof x73` is expected to be "object"');
 
 var x74 = new Date(date_2099_end);
-if (x74 === undefined) {
-  throw new Test262Error("#7.4: new Date(date_2099_end) !== undefined");
-}
+assert.notSameValue(x74, undefined, 'The value of x74 is expected to not equal ``undefined``');
 
-if (typeof new Date(date_2100_start) !== "object") {
-  throw new Test262Error("#8.1: typeof new Date(date_2100_start) === 'object'");
-}
+assert.sameValue(
+  typeof new Date(date_2100_start),
+  "object",
+  'The value of `typeof new Date(date_2100_start)` is expected to be "object"'
+);
 
-if (new Date(date_2100_start) === undefined) {
-  throw new Test262Error("#8.2: new Date(date_2100_start) === undefined");
-}
+assert.notSameValue(
+  new Date(date_2100_start),
+  undefined,
+  'new Date(date_2100_start) is expected to not equal ``undefined``'
+);
 
 var x83 = new Date(date_2100_start);
-if (typeof x83 !== "object") {
-  throw new Test262Error("#8.3: typeof new Date(date_2100_start) !== 'object'");
-}
+assert.sameValue(typeof x83, "object", 'The value of `typeof x83` is expected to be "object"');
 
 var x84 = new Date(date_2100_start);
-if (x84 === undefined) {
-  throw new Test262Error("#8.4: new Date(date_2100_start) !== undefined");
-}
+assert.notSameValue(x84, undefined, 'The value of x84 is expected to not equal ``undefined``');

test/built-ins/Date/S15.9.3.2_A2_T1.js

@@ -12,121 +12,153 @@ includes: [dateConstants.js]
 ---*/
 
 var x11 = new Date(date_1899_end);
-if (typeof x11.constructor.prototype !== "object") {
-  throw new Test262Error("#1.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x11.constructor.prototype,
+  "object",
+  'The value of `typeof x11.constructor.prototype` is expected to be "object"'
+);
 
 var x12 = new Date(date_1899_end);
-if (!Date.prototype.isPrototypeOf(x12)) {
-  throw new Test262Error('#1.2: Date.prototype.isPrototypeOf(x12)');
-}
+assert(Date.prototype.isPrototypeOf(x12), 'Date.prototype.isPrototypeOf(x12) must return true');
 
 var x13 = new Date(date_1899_end);
-if (Date.prototype !== x13.constructor.prototype) {
-  throw new Test262Error("#1.3: Date.prototype !== x13.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x13.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x13.constructor.prototype'
+);
 
 var x21 = new Date(date_1900_start);
-if (typeof x21.constructor.prototype !== "object") {
-  throw new Test262Error("#2.1: typeof x21.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x21.constructor.prototype,
+  "object",
+  'The value of `typeof x21.constructor.prototype` is expected to be "object"'
+);
 
 var x22 = new Date(date_1900_start);
-if (!Date.prototype.isPrototypeOf(x22)) {
-  throw new Test262Error('#2.2: Date.prototype.isPrototypeOf(x22)');
-}
+assert(Date.prototype.isPrototypeOf(x22), 'Date.prototype.isPrototypeOf(x22) must return true');
 
 var x23 = new Date(date_1900_start);
-if (Date.prototype !== x23.constructor.prototype) {
-  throw new Test262Error("#2.3: Date.prototype !== x23.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x23.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x23.constructor.prototype'
+);
 
 var x31 = new Date(date_1969_end);
-if (typeof x31.constructor.prototype !== "object") {
-  throw new Test262Error("#3.1: typeof x31.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x31.constructor.prototype,
+  "object",
+  'The value of `typeof x31.constructor.prototype` is expected to be "object"'
+);
 
 var x32 = new Date(date_1969_end);
-if (!Date.prototype.isPrototypeOf(x32)) {
-  throw new Test262Error('#3.2: Date.prototype.isPrototypeOf(x32)');
-}
+assert(Date.prototype.isPrototypeOf(x32), 'Date.prototype.isPrototypeOf(x32) must return true');
 
 var x33 = new Date(date_1969_end);
-if (Date.prototype !== x33.constructor.prototype) {
-  throw new Test262Error("#3.3: Date.prototype !== x33.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x33.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x33.constructor.prototype'
+);
 
 var x41 = new Date(date_1970_start);
-if (typeof x41.constructor.prototype !== "object") {
-  throw new Test262Error("#4.1: typeof x11.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x41.constructor.prototype,
+  "object",
+  'The value of `typeof x41.constructor.prototype` is expected to be "object"'
+);
 
 var x42 = new Date(date_1970_start);
-if (!Date.prototype.isPrototypeOf(x42)) {
-  throw new Test262Error('#4.2: Date.prototype.isPrototypeOf(x42)');
-}
+assert(Date.prototype.isPrototypeOf(x42), 'Date.prototype.isPrototypeOf(x42) must return true');
 
 var x43 = new Date(date_1970_start);
-if (Date.prototype !== x43.constructor.prototype) {
-  throw new Test262Error("#4.3: Date.prototype !== x43.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x43.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x43.constructor.prototype'
+);
 
 var x51 = new Date(date_1999_end);
-if (typeof x51.constructor.prototype !== "object") {
-  throw new Test262Error("#5.1: typeof x51.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x51.constructor.prototype,
+  "object",
+  'The value of `typeof x51.constructor.prototype` is expected to be "object"'
+);
 
 var x52 = new Date(date_1999_end);
-if (!Date.prototype.isPrototypeOf(x52)) {
-  throw new Test262Error('#5.2: Date.prototype.isPrototypeOf(x52)');
-}
+assert(Date.prototype.isPrototypeOf(x52), 'Date.prototype.isPrototypeOf(x52) must return true');
 
 var x53 = new Date(date_1999_end);
-if (Date.prototype !== x53.constructor.prototype) {
-  throw new Test262Error("#5.3: Date.prototype !== x53.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x53.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x53.constructor.prototype'
+);
 
 var x61 = new Date(date_2000_start);
-if (typeof x61.constructor.prototype !== "object") {
-  throw new Test262Error("#6.1: typeof x61.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x61.constructor.prototype,
+  "object",
+  'The value of `typeof x61.constructor.prototype` is expected to be "object"'
+);
 
 var x62 = new Date(date_2000_start);
-if (!Date.prototype.isPrototypeOf(x62)) {
-  throw new Test262Error('#6.2: Date.prototype.isPrototypeOf(x62)');
-}
+assert(Date.prototype.isPrototypeOf(x62), 'Date.prototype.isPrototypeOf(x62) must return true');
 
 var x63 = new Date(date_2000_start);
-if (Date.prototype !== x63.constructor.prototype) {
-  throw new Test262Error("#6.3: Date.prototype !== x63.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x63.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x63.constructor.prototype'
+);
 
 var x71 = new Date(date_2099_end);
-if (typeof x71.constructor.prototype !== "object") {
-  throw new Test262Error("#7.1: typeof x71.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x71.constructor.prototype,
+  "object",
+  'The value of `typeof x71.constructor.prototype` is expected to be "object"'
+);
 
 var x72 = new Date(date_2099_end);
-if (!Date.prototype.isPrototypeOf(x72)) {
-  throw new Test262Error('#7.2: Date.prototype.isPrototypeOf(x72)');
-}
+assert(Date.prototype.isPrototypeOf(x72), 'Date.prototype.isPrototypeOf(x72) must return true');
 
 var x73 = new Date(date_2099_end);
-if (Date.prototype !== x73.constructor.prototype) {
-  throw new Test262Error("#7.3: Date.prototype !== x73.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x73.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x73.constructor.prototype'
+);
 
 var x81 = new Date(date_2100_start);
-if (typeof x81.constructor.prototype !== "object") {
-  throw new Test262Error("#8.1: typeof x81.constructor.prototype === 'object'");
-}
+
+assert.sameValue(
+  typeof x81.constructor.prototype,
+  "object",
+  'The value of `typeof x81.constructor.prototype` is expected to be "object"'
+);
 
 var x82 = new Date(date_2100_start);
-if (!Date.prototype.isPrototypeOf(x82)) {
-  throw new Test262Error('#8.2: Date.prototype.isPrototypeOf(x82)');
-}
+assert(Date.prototype.isPrototypeOf(x82), 'Date.prototype.isPrototypeOf(x82) must return true');
 
 var x83 = new Date(date_2100_start);
-if (Date.prototype !== x83.constructor.prototype) {
-  throw new Test262Error("#8.3: Date.prototype !== x83.constructor.prototype");
-}
+
+assert.sameValue(
+  Date.prototype,
+  x83.constructor.prototype,
+  'The value of Date.prototype is expected to equal the value of x83.constructor.prototype'
+);

test/built-ins/Date/S15.9.3.2_A3_T1.1.js

@@ -11,41 +11,65 @@ includes: [dateConstants.js]
 ---*/
 
 var x1 = new Date(date_1899_end);
-if (Object.prototype.toString.call(x1) !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x1),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(date_1899_end)) must return "[object Date]"'
+);
 
 var x2 = new Date(date_1900_start);
-if (Object.prototype.toString.call(x2) !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x2),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(date_1900_start)) must return "[object Date]"'
+);
 
 var x3 = new Date(date_1969_end);
-if (Object.prototype.toString.call(x3) !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x3),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(date_1969_end)) must return "[object Date]"'
+);
 
 var x4 = new Date(date_1970_start);
-if (Object.prototype.toString.call(x4) !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x4),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(date_1970_start)) must return "[object Date]"'
+);
 
 var x5 = new Date(date_1999_end);
-if (Object.prototype.toString.call(x5) !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x5),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(date_1999_end)) must return "[object Date]"'
+);
 
 var x6 = new Date(date_2000_start);
-if (Object.prototype.toString.call(x6) !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x6),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(date_2000_start)) must return "[object Date]"'
+);
 
 var x7 = new Date(date_2099_end);
-if (Object.prototype.toString.call(x7) !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x7),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(date_2099_end)) must return "[object Date]"'
+);
 
 var x8 = new Date(date_2100_start);
-if (Object.prototype.toString.call(x8) !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+
+assert.sameValue(
+  Object.prototype.toString.call(x8),
+  "[object Date]",
+  'Object.prototype.toString.call(new Date(date_2100_start)) must return "[object Date]"'
+);

test/built-ins/Date/S15.9.3.2_A3_T1.2.js

@@ -13,41 +13,25 @@ includes: [dateConstants.js]
 Date.prototype.toString = Object.prototype.toString;
 
 var x1 = new Date(date_1899_end);
-if (x1.toString() !== "[object Date]") {
-  throw new Test262Error("#1: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x1.toString(), "[object Date]", 'x1.toString() must return "[object Date]"');
 
 var x2 = new Date(date_1900_start);
-if (x2.toString() !== "[object Date]") {
-  throw new Test262Error("#2: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x2.toString(), "[object Date]", 'x2.toString() must return "[object Date]"');
 
 var x3 = new Date(date_1969_end);
-if (x3.toString() !== "[object Date]") {
-  throw new Test262Error("#3: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x3.toString(), "[object Date]", 'x3.toString() must return "[object Date]"');
 
 var x4 = new Date(date_1970_start);
-if (x4.toString() !== "[object Date]") {
-  throw new Test262Error("#4: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x4.toString(), "[object Date]", 'x4.toString() must return "[object Date]"');
 
 var x5 = new Date(date_1999_end);
-if (x5.toString() !== "[object Date]") {
-  throw new Test262Error("#5: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x5.toString(), "[object Date]", 'x5.toString() must return "[object Date]"');
 
 var x6 = new Date(date_2000_start);
-if (x6.toString() !== "[object Date]") {
-  throw new Test262Error("#6: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x6.toString(), "[object Date]", 'x6.toString() must return "[object Date]"');
 
 var x7 = new Date(date_2099_end);
-if (x7.toString() !== "[object Date]") {
-  throw new Test262Error("#7: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x7.toString(), "[object Date]", 'x7.toString() must return "[object Date]"');
 
 var x8 = new Date(date_2100_start);
-if (x8.toString() !== "[object Date]") {
-  throw new Test262Error("#8: The [[Class]] property of the newly constructed object is set to 'Date'");
-}
+assert.sameValue(x8.toString(), "[object Date]", 'x8.toString() must return "[object Date]"');

test/built-ins/Date/S15.9.4_A1.js

@@ -6,7 +6,4 @@ info: The Date constructor has the property "prototype"
 esid: sec-date-constructor
 description: Checking existence of the property "prototype"
 ---*/
-
-if (!Date.hasOwnProperty("prototype")) {
-  throw new Test262Error('#1: The Date constructor has the property "prototype"');
-}
+assert(Date.hasOwnProperty("prototype"), 'Date.hasOwnProperty("prototype") must return true');

test/built-ins/Date/S15.9.4_A2.js

@@ -6,7 +6,4 @@ info: The Date constructor has the property "parse"
 esid: sec-date-constructor
 description: Checking existence of the property "parse"
 ---*/
-
-if (!Date.hasOwnProperty("parse")) {
-  throw new Test262Error('#1: The Date constructor has the property "parse"');
-}
+assert(Date.hasOwnProperty("parse"), 'Date.hasOwnProperty("parse") must return true');

test/built-ins/Date/S15.9.4_A3.js

@@ -6,7 +6,4 @@ info: The Date constructor has the property "UTC"
 esid: sec-date-constructor
 description: Checking existence of the property "UTC"
 ---*/
-
-if (!Date.hasOwnProperty("UTC")) {
-  throw new Test262Error('#1: The Date constructor has the property "UTC"');
-}
+assert(Date.hasOwnProperty("UTC"), 'Date.hasOwnProperty("UTC") must return true');

test/built-ins/Date/S15.9.4_A4.js

@@ -8,8 +8,4 @@ info: |
 esid: sec-date-constructor
 description: Checking Function.prototype.isPrototypeOf(Date)
 ---*/
-
-//CHECK#1
-if (!(Function.prototype.isPrototypeOf(Date))) {
-  throw new Test262Error('#1: the value of the internal [[Prototype]] property of the Date constructor is the Function prototype object.');
-}
+assert(Function.prototype.isPrototypeOf(Date), 'Function.prototype.isPrototypeOf(Date) must return true');

test/built-ins/Date/S15.9.4_A5.js

@@ -6,13 +6,5 @@ info: Date constructor has length property whose value is 7
 esid: sec-date-constructor
 description: Checking Date.length property
 ---*/
-
-//CHECK#1
-if (!Date.hasOwnProperty("length")) {
-  throw new Test262Error('#1: Date constructor has length property');
-}
-
-//CHECK#2
-if (Date.length !== 7) {
-  throw new Test262Error('#2: Date constructor length property value should be 7');
-}
+assert(Date.hasOwnProperty("length"), 'Date.hasOwnProperty("length") must return true');
+assert.sameValue(Date.length, 7, 'The value of Date.length is expected to be 7');

test/built-ins/Date/UTC/S15.9.4.3_A1_T1.js

@@ -9,10 +9,9 @@ description: Checking absence of ReadOnly attribute
 ---*/
 
 var x = Date.UTC;
-if (x === 1)
+if (x === 1) {
   Date.UTC = 2;
-else
+} else {
   Date.UTC = 1;
-if (Date.UTC === x) {
-  throw new Test262Error('#1: The Date.UTC has not the attribute ReadOnly');
 }
+assert.notSameValue(Date.UTC, x, 'The value of Date.UTC is expected to not equal the value of `x`');

test/built-ins/Date/UTC/S15.9.4.3_A1_T2.js

@@ -7,11 +7,5 @@ info: The Date property "UTC" has { DontEnum } attributes
 es5id: 15.9.4.3_A1_T2
 description: Checking absence of DontDelete attribute
 ---*/
-
-if (delete Date.UTC === false) {
-  throw new Test262Error('#1: The Date.UTC property has not the attributes DontDelete');
-}
-
-if (Date.hasOwnProperty('UTC')) {
-  throw new Test262Error('#2: The Date.UTC property has not the attributes DontDelete');
-}
+assert.notSameValue(delete Date.UTC, false, 'The value of delete Date.UTC is not false');
+assert(!Date.hasOwnProperty('UTC'), 'The value of !Date.hasOwnProperty(\'UTC\') is expected to be true');

test/built-ins/Date/UTC/S15.9.4.3_A1_T3.js

@@ -7,13 +7,11 @@ info: The Date property "UTC" has { DontEnum } attributes
 es5id: 15.9.4.3_A1_T3
 description: Checking DontEnum attribute
 ---*/
-
-if (Date.propertyIsEnumerable('UTC')) {
-  throw new Test262Error('#1: The Date.UTC property has the attribute DontEnum');
-}
+assert(
+  !Date.propertyIsEnumerable('UTC'),
+  'The value of !Date.propertyIsEnumerable(\'UTC\') is expected to be true'
+);
 
 for (var x in Date) {
-  if (x === "UTC") {
-    throw new Test262Error('#2: The Date.UTC has the attribute DontEnum');
-  }
+  assert.notSameValue(x, "UTC", 'The value of x is not "UTC"');
 }

test/built-ins/Date/UTC/S15.9.4.3_A2_T1.js

@@ -7,11 +7,5 @@ info: The "length" property of the "UTC" is 7
 es5id: 15.9.4.3_A2_T1
 description: The "length" property of the "UTC" is 7
 ---*/
-
-if (Date.UTC.hasOwnProperty("length") !== true) {
-  throw new Test262Error('#1: The UTC has a "length" property');
-}
-
-if (Date.UTC.length !== 7) {
-  throw new Test262Error('#2: The "length" property of the UTC is 7');
-}
+assert.sameValue(Date.UTC.hasOwnProperty("length"), true, 'Date.UTC.hasOwnProperty("length") must return true');
+assert.sameValue(Date.UTC.length, 7, 'The value of Date.UTC.length is expected to be 7');

test/built-ins/Date/UTC/S15.9.4.3_A3_T1.js

@@ -13,6 +13,4 @@ includes: [propertyHelper.js]
 
 var x = Date.UTC.length;
 verifyNotWritable(Date.UTC, "length", null, 1);
-if (Date.UTC.length !== x) {
-  throw new Test262Error('#1: The Date.UTC.length has the attribute ReadOnly');
-}
+assert.sameValue(Date.UTC.length, x, 'The value of Date.UTC.length is expected to equal the value of x');

test/built-ins/Date/UTC/S15.9.4.3_A3_T2.js

@@ -10,10 +10,9 @@ es5id: 15.9.4.3_A3_T2
 description: Checking DontDelete attribute
 ---*/
 
-if (delete Date.UTC.length !== true) {
-  throw new Test262Error('#1: The Date.UTC.length property does not have the attributes DontDelete');
-}
+assert.sameValue(delete Date.UTC.length, true, 'The value of `delete Date.UTC.length` is expected to be true');
 
-if (Date.UTC.hasOwnProperty('length')) {
-  throw new Test262Error('#2: The Date.UTC.length property does not have the attributes DontDelete');
-}
+assert(
+  !Date.UTC.hasOwnProperty('length'),
+  'The value of !Date.UTC.hasOwnProperty(\'length\') is expected to be true'
+);

test/built-ins/Date/UTC/S15.9.4.3_A3_T3.js

@@ -9,13 +9,11 @@ info: |
 es5id: 15.9.4.3_A3_T3
 description: Checking DontEnum attribute
 ---*/
-
-if (Date.UTC.propertyIsEnumerable('length')) {
-  throw new Test262Error('#1: The Date.UTC.length property has the attribute DontEnum');
-}
+assert(
+  !Date.UTC.propertyIsEnumerable('length'),
+  'The value of !Date.UTC.propertyIsEnumerable(\'length\') is expected to be true'
+);
 
 for (var x in Date.UTC) {
-  if (x === "length") {
-    throw new Test262Error('#2: The Date.UTC.length has the attribute DontEnum');
-  }
+  assert.notSameValue(x, "length", 'The value of x is not "length"');
 }

test/built-ins/Date/parse/S15.9.4.2_A1_T1.js

@@ -8,10 +8,9 @@ description: Checking absence of ReadOnly attribute
 ---*/
 
 var x = Date.parse;
-if (x === 1)
+if (x === 1) {
   Date.parse = 2;
-else
+} else {
   Date.parse = 1;
-if (Date.parse === x) {
-  throw new Test262Error('#1: The Date.parse has not the attribute ReadOnly');
 }
+assert.notSameValue(Date.parse, x, 'The value of Date.parse is expected to not equal the value of `x`');

test/built-ins/Date/parse/S15.9.4.2_A1_T2.js

@@ -6,11 +6,5 @@ info: The Date property "parse" has { DontEnum } attributes
 esid: sec-date.parse
 description: Checking absence of DontDelete attribute
 ---*/
-
-if (delete Date.parse === false) {
-  throw new Test262Error('#1: The Date.parse property has not the attributes DontDelete');
-}
-
-if (Date.hasOwnProperty('parse')) {
-  throw new Test262Error('#2: The Date.parse property has not the attributes DontDelete');
-}
+assert.notSameValue(delete Date.parse, false, 'The value of delete Date.parse is not false');
+assert(!Date.hasOwnProperty('parse'), 'The value of !Date.hasOwnProperty(\'parse\') is expected to be true');

test/built-ins/Date/parse/S15.9.4.2_A1_T3.js

@@ -6,13 +6,11 @@ info: The Date property "parse" has { DontEnum } attributes
 esid: sec-date.parse
 description: Checking DontEnum attribute
 ---*/
-
-if (Date.propertyIsEnumerable('parse')) {
-  throw new Test262Error('#1: The Date.parse property has the attribute DontEnum');
-}
+assert(
+  !Date.propertyIsEnumerable('parse'),
+  'The value of !Date.propertyIsEnumerable(\'parse\') is expected to be true'
+);
 
 for (var x in Date) {
-  if (x === "parse") {
-    throw new Test262Error('#2: The Date.parse has the attribute DontEnum');
-  }
+  assert.notSameValue(x, "parse", 'The value of x is not "parse"');
 }

test/built-ins/Date/parse/S15.9.4.2_A2_T1.js

@@ -6,11 +6,5 @@ info: The "length" property of the "parse" is 1
 esid: sec-date.parse
 description: The "length" property of the "parse" is 1
 ---*/
-
-if (Date.parse.hasOwnProperty("length") !== true) {
-  throw new Test262Error('#1: The parse has a "length" property');
-}
-
-if (Date.parse.length !== 1) {
-  throw new Test262Error('#2: The "length" property of the parse is 1');
-}
+assert.sameValue(Date.parse.hasOwnProperty("length"), true, 'Date.parse.hasOwnProperty("length") must return true');
+assert.sameValue(Date.parse.length, 1, 'The value of Date.parse.length is expected to be 1');

test/built-ins/Date/parse/S15.9.4.2_A3_T1.js

@@ -12,6 +12,4 @@ includes: [propertyHelper.js]
 
 var x = Date.parse.length;
 verifyNotWritable(Date.parse, "length", null, 1);
-if (Date.parse.length !== x) {
-  throw new Test262Error('#1: The Date.parse.length has the attribute ReadOnly');
-}
+assert.sameValue(Date.parse.length, x, 'The value of Date.parse.length is expected to equal the value of x');

test/built-ins/Date/parse/S15.9.4.2_A3_T2.js

@@ -8,11 +8,9 @@ info: |
 esid: sec-date.parse
 description: Checking DontDelete attribute
 ---*/
+assert.sameValue(delete Date.parse.length, true, 'The value of `delete Date.parse.length` is expected to be true');
 
-if (delete Date.parse.length !== true) {
-  throw new Test262Error('#1: The Date.parse.length property does not have the attributes DontDelete');
-}
-
-if (Date.parse.hasOwnProperty('length')) {
-  throw new Test262Error('#2: The Date.parse.length property does not have the attributes DontDelete');
-}
+assert(
+  !Date.parse.hasOwnProperty('length'),
+  'The value of !Date.parse.hasOwnProperty(\'length\') is expected to be true'
+);

test/built-ins/Date/parse/S15.9.4.2_A3_T3.js

@@ -8,13 +8,11 @@ info: |
 esid: sec-date.parse
 description: Checking DontEnum attribute
 ---*/
-
-if (Date.parse.propertyIsEnumerable('length')) {
-  throw new Test262Error('#1: The Date.parse.length property has the attribute DontEnum');
-}
+assert(
+  !Date.parse.propertyIsEnumerable('length'),
+  'The value of !Date.parse.propertyIsEnumerable(\'length\') is expected to be true'
+);
 
 for (var x in Date.parse) {
-  if (x === "length") {
-    throw new Test262Error('#2: The Date.parse.length has the attribute DontEnum');
-  }
+  assert.notSameValue(x, "length", 'The value of x is not "length"');
 }

test/built-ins/Date/prototype/S15.9.4.1_A1_T1.js

@@ -12,6 +12,4 @@ includes: [propertyHelper.js]
 
 var x = Date.prototype;
 verifyNotWritable(Date, "prototype", null, 1);
-if (Date.prototype !== x) {
-  throw new Test262Error('#1: The Date.prototype has the attribute ReadOnly');
-}
+assert.sameValue(Date.prototype, x, 'The value of Date.prototype is expected to equal the value of x');

test/built-ins/Date/prototype/S15.9.4.1_A1_T2.js

@@ -13,11 +13,11 @@ includes: [propertyHelper.js]
 verifyNotConfigurable(Date, "prototype");
 
 try {
-  if (delete Date.prototype !== false) {
-    throw new Test262Error('#1: The Date.prototype property has the attributes DontDelete');
-  }
+  assert.sameValue(delete Date.prototype, false);
 } catch (e) {
-  if (e instanceof Test262Error) throw e;
+  if (e instanceof Test262Error) {
+    throw e;
+  }
   assert(e instanceof TypeError);
 }
 

test/built-ins/Date/prototype/S15.9.4.1_A1_T3.js

@@ -8,13 +8,11 @@ info: |
 esid: sec-date.prototype
 description: Checking DontEnum attribute
 ---*/
-
-if (Date.propertyIsEnumerable('prototype')) {
-  throw new Test262Error('#1: The Date.prototype property has the attribute DontEnum');
-}
+assert(
+  !Date.propertyIsEnumerable('prototype'),
+  'The value of !Date.propertyIsEnumerable(\'prototype\') is expected to be true'
+);
 
 for (var x in Date) {
-  if (x === "prototype") {
-    throw new Test262Error('#2: The Date.prototype has the attribute DontEnum');
-  }
+  assert.notSameValue(x, "prototype", 'The value of x is not "prototype"');
 }

test/built-ins/Date/prototype/S15.9.5_A01_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "constructor"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "constructor"
 ---*/
-
-if (Date.prototype.hasOwnProperty("constructor") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "constructor"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("constructor"),
+  true,
+  'Date.prototype.hasOwnProperty("constructor") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A02_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "toString"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "toString"
 ---*/
-
-if (Date.prototype.hasOwnProperty("toString") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "toString"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("toString"),
+  true,
+  'Date.prototype.hasOwnProperty("toString") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A03_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "toDateString"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "toDateString"
 ---*/
-
-if (Date.prototype.hasOwnProperty("toDateString") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "toDateString"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("toDateString"),
+  true,
+  'Date.prototype.hasOwnProperty("toDateString") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A04_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "toTimeString"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "toTimeString"
 ---*/
-
-if (Date.prototype.hasOwnProperty("toTimeString") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "toTimeString"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("toTimeString"),
+  true,
+  'Date.prototype.hasOwnProperty("toTimeString") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A05_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "toLocaleString"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "toLocaleString"
 ---*/
-
-if (Date.prototype.hasOwnProperty("toLocaleString") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "toLocaleString"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("toLocaleString"),
+  true,
+  'Date.prototype.hasOwnProperty("toLocaleString") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A06_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "toLocaleDateString"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "toLocaleDateString"
 ---*/
-
-if (Date.prototype.hasOwnProperty("toLocaleDateString") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "toLocaleDateString"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("toLocaleDateString"),
+  true,
+  'Date.prototype.hasOwnProperty("toLocaleDateString") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A07_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "toLocaleTimeString"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "toLocaleTimeString"
 ---*/
-
-if (Date.prototype.hasOwnProperty("toLocaleTimeString") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "toLocaleTimeString"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("toLocaleTimeString"),
+  true,
+  'Date.prototype.hasOwnProperty("toLocaleTimeString") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A08_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "valueOf"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "valueOf"
 ---*/
-
-if (Date.prototype.hasOwnProperty("valueOf") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "valueOf"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("valueOf"),
+  true,
+  'Date.prototype.hasOwnProperty("valueOf") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A09_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getTime"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getTime"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getTime") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getTime"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getTime"),
+  true,
+  'Date.prototype.hasOwnProperty("getTime") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A10_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getFullYear"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getFullYear"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getFullYear") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getFullYear"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getFullYear"),
+  true,
+  'Date.prototype.hasOwnProperty("getFullYear") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A11_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getUTCFullYear"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getUTCFullYear"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getUTCFullYear") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getUTCFullYear"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getUTCFullYear"),
+  true,
+  'Date.prototype.hasOwnProperty("getUTCFullYear") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A12_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getMonth"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getMonth"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getMonth") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getMonth"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getMonth"),
+  true,
+  'Date.prototype.hasOwnProperty("getMonth") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A13_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getUTCMonth"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getUTCMonth"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getUTCMonth") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getUTCMonth"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getUTCMonth"),
+  true,
+  'Date.prototype.hasOwnProperty("getUTCMonth") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A14_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getDate"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getDate"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getDate") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getDate"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getDate"),
+  true,
+  'Date.prototype.hasOwnProperty("getDate") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A15_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getUTCDate"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getUTCDate"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getUTCDate") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getUTCDate"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getUTCDate"),
+  true,
+  'Date.prototype.hasOwnProperty("getUTCDate") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A16_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getDay"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getDay"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getDay") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getDay"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getDay"),
+  true,
+  'Date.prototype.hasOwnProperty("getDay") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A17_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getUTCDay"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getUTCDay"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getUTCDay") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getUTCDay"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getUTCDay"),
+  true,
+  'Date.prototype.hasOwnProperty("getUTCDay") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A18_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getHours"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getHours"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getHours") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getHours"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getHours"),
+  true,
+  'Date.prototype.hasOwnProperty("getHours") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A19_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getUTCHours"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getUTCHours"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getUTCHours") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getUTCHours"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getUTCHours"),
+  true,
+  'Date.prototype.hasOwnProperty("getUTCHours") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A20_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getMinutes"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getMinutes"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getMinutes") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getMinutes"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getMinutes"),
+  true,
+  'Date.prototype.hasOwnProperty("getMinutes") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A21_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getUTCMinutes"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getUTCMinutes"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getUTCMinutes") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getUTCMinutes"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getUTCMinutes"),
+  true,
+  'Date.prototype.hasOwnProperty("getUTCMinutes") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A22_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getSeconds"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getSeconds"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getSeconds") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getSeconds"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getSeconds"),
+  true,
+  'Date.prototype.hasOwnProperty("getSeconds") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A23_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getUTCSeconds"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getUTCSeconds"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getUTCSeconds") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getUTCSeconds"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getUTCSeconds"),
+  true,
+  'Date.prototype.hasOwnProperty("getUTCSeconds") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A24_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getMilliseconds"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getMilliseconds"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getMilliseconds") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getMilliseconds"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getMilliseconds"),
+  true,
+  'Date.prototype.hasOwnProperty("getMilliseconds") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A25_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getUTCMilliseconds"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getUTCMilliseconds"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getUTCMilliseconds") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getUTCMilliseconds"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getUTCMilliseconds"),
+  true,
+  'Date.prototype.hasOwnProperty("getUTCMilliseconds") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A26_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "getTimezoneOffset"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "getTimezoneOffset"
 ---*/
-
-if (Date.prototype.hasOwnProperty("getTimezoneOffset") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "getTimezoneOffset"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("getTimezoneOffset"),
+  true,
+  'Date.prototype.hasOwnProperty("getTimezoneOffset") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A27_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setTime"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setTime"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setTime") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setTime"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setTime"),
+  true,
+  'Date.prototype.hasOwnProperty("setTime") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A28_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setMilliseconds"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setMilliseconds"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setMilliseconds") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setMilliseconds"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setMilliseconds"),
+  true,
+  'Date.prototype.hasOwnProperty("setMilliseconds") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A29_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setUTCMilliseconds"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setUTCMilliseconds"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setUTCMilliseconds") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setUTCMilliseconds"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setUTCMilliseconds"),
+  true,
+  'Date.prototype.hasOwnProperty("setUTCMilliseconds") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A30_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setSeconds"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setSeconds"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setSeconds") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setSeconds"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setSeconds"),
+  true,
+  'Date.prototype.hasOwnProperty("setSeconds") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A31_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setUTCSeconds"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setUTCSeconds"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setUTCSeconds") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setUTCSeconds"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setUTCSeconds"),
+  true,
+  'Date.prototype.hasOwnProperty("setUTCSeconds") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A32_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setMinutes"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setMinutes"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setMinutes") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setMinutes"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setMinutes"),
+  true,
+  'Date.prototype.hasOwnProperty("setMinutes") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A33_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setUTCMinutes"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setUTCMinutes"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setUTCMinutes") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setUTCMinutes"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setUTCMinutes"),
+  true,
+  'Date.prototype.hasOwnProperty("setUTCMinutes") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A34_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setHours"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setHours"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setHours") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setHours"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setHours"),
+  true,
+  'Date.prototype.hasOwnProperty("setHours") must return true'
+);

test/built-ins/Date/prototype/S15.9.5_A35_T1.js

@@ -6,7 +6,8 @@ info: The Date.prototype has the property "setUTCHours"
 esid: sec-properties-of-the-date-prototype-object
 description: The Date.prototype has the property "setUTCHours"
 ---*/
-
-if (Date.prototype.hasOwnProperty("setUTCHours") !== true) {
-  throw new Test262Error('#1: The Date.prototype has the property "setUTCHours"');
-}
+assert.sameValue(
+  Date.prototype.hasOwnProperty("setUTCHours"),
+  true,
+  'Date.prototype.hasOwnProperty("setUTCHours") must return true'
+);