Merge pull request #378 from bocoup/Array.of

Add tests for Array.of

test/built-ins/Array/of/Array.of_assignment-to-new-object-length.js

@@ -1,17 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
-includes: [compareArray.js]
----*/
-function Empty() {}
-Empty.of = Array.of;
-Object.defineProperty(Empty.prototype, "length", {get: function() { return 0; }});
-
-assert.throws(TypeError, function() { Empty.of(); });

test/built-ins/Array/of/Array.of_basics.js

@@ -1,23 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
-includes: [compareArray.js]
----*/
-var a = Array.of();
-var elem = [];
-assert.sameValue(a.length, 0);
-a = Array.of(undefined, null, 3.14, elem);
-
-assert(compareArray(a, [undefined, null, 3.14, elem]));
-a = [];
-for (var i = 0; i < 1000; i++) {
-  a[i] = i;
-}
-assert(compareArray(Array.of.apply(null, a), a));

test/built-ins/Array/of/Array.of_calls-a-length-setter-if-one-is-present.js

@@ -1,36 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
-includes: [compareArray.js]
----*/
-var hits = 0;
-var lastObj = null, lastVal = undefined;
-function setter(v) {
-  hits++;
-  lastObj = this;
-  lastVal = v;
-}
-
-// when the setter is on the new object
-function Pack() {
-  Object.defineProperty(this, "length", {set: setter});
-}
-Pack.of = Array.of;
-var pack = Pack.of("wolves", "cards", "cigarettes", "lies");
-assert(compareArray(lastObj, pack));
-assert.sameValue(lastVal, 4);
-
-// when the setter is on the new object's prototype
-function Bevy() {}
-Object.defineProperty(Bevy.prototype, "length", {set: setter});
-Bevy.of = Array.of;
-var bevy = Bevy.of("quail");
-assert(compareArray(lastObj, bevy));
-assert.sameValue(lastVal, 1);

test/built-ins/Array/of/Array.of_can-be-transplanted-to-other-classes.js

@@ -1,37 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-
-    Array.of can be transplanted to other classes.
-
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
-includes: [compareArray.js]
----*/
-var hits = 0;
-function Bag() {
-    hits++;
-}
-Bag.of = Array.of;
-
-hits = 0;
-var actual = Bag.of("zero", "one");
-assert.sameValue(hits, 1);
-
-hits = 0;
-var expected = new Bag;
-expected[0] = "zero";
-expected[1] = "one";
-expected.length = 2;
-assert(compareArray(actual, expected));
-
-hits = 0;
-actual = Array.of.call(Bag, "zero", "one");
-assert.sameValue(hits, 1);
-assert(compareArray(actual, expected));
-

test/built-ins/Array/of/Array.of_check-superficial-features.js

@@ -1,45 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
-includes: [compareArray.js]
----*/
-
-// Array.of Check superficial features.
-
-var desc = Object.getOwnPropertyDescriptor(Array, "of");
-
-assert.sameValue(desc.configurable, true);
-assert.sameValue(desc.enumerable, false);
-assert.sameValue(desc.writable, true);
-assert.sameValue(Array.of.length, 0);
-assert.throws(TypeError, function() { new Array.of() });  // not a constructor
-
-// When the this-value passed in is not a constructor, the result is an array.
-[
-  undefined,
-  null,
-  false,
-  "cow",
-  NaN,
-  67,
-  Infinity,
-  -Infinity,
-  Math.cos, // builtin functions with no [[Construct]] slot
-  Math.cos.bind(Math) // bound builtin functions with no [[Construct]] slot
-].forEach(function(val) {
-  assert.sameValue(Array.isArray(Array.of.call(val, val)), true);
-});
-
-
-var boundFn = (function() {}).bind(null);
-var instance = Array.of.call(boundFn, 1, 2, 3);
-assert.sameValue(instance.length, 3);
-assert.sameValue(instance instanceof boundFn, true);
-assert.sameValue(Array.isArray(instance), false);

test/built-ins/Array/of/Array.of_does-not-leave-holes.js

@@ -1,20 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-
-    Array.of does not leave holes
-
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
-includes: [compareArray.js]
----*/
-assert(compareArray(Array.of(undefined), [undefined]));
-assert(compareArray(Array.of(undefined, undefined), [undefined, undefined]));
-assert(compareArray(Array.of.apply(null, [,,undefined]), [undefined, undefined, undefined]));
-assert(compareArray(Array.of.apply(null, Array(4)), [undefined, undefined, undefined, undefined]));
-

test/built-ins/Array/of/Array.of_does-not-trigger-prototype-setters.js

@@ -1,32 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-
-    Array.of does not trigger prototype setters.
-    (It defines elements rather than assigning to them.)
-
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
-includes: [compareArray.js]
----*/
-
-
-
-
-function Bag() {}
-Bag.of = Array.of;
-
-var status = "pass";
-Object.defineProperty(Array.prototype, "0", {set: function(v) {status = "FAIL 1"}});
-assert.sameValue(Array.of(1)[0], 1);
-assert.sameValue(status, "pass");
-
-Object.defineProperty(Bag.prototype, "0", {set: function(v) {status = "FAIL 2"}});
-assert.sameValue(Bag.of(1)[0], 1);
-assert.sameValue(status, "pass");
-

test/built-ins/Array/of/Array.of_makes-real-arrays.js

@@ -1,28 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-
-    Array.of makes real arrays.
-
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
----*/
-
-function check(a) {
-  assert.sameValue(Object.getPrototypeOf(a), Array.prototype);
-  assert.sameValue(Array.isArray(a), true);
-  a[9] = 9;
-  assert.sameValue(a.length, 10);
-}
-
-check(Array.of());
-check(Array.of(0));
-check(Array.of(0, 1, 2));
-var f = Array.of;
-check(f());
-

test/built-ins/Array/of/Array.of_passes-the-number-of-arguments-to-the-constructor-it-calls.js

@@ -1,26 +0,0 @@
-// Copyright (c) 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-/*---
-es6id: 22.1.2.3
-description: >
-    The Array.of() method creates a new Array instance
-    with a variable number of arguments, regardless of
-    number or type of the arguments.
-
-    Array.of passes the number of arguments to the constructor it calls.
-
-    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/of
-includes: [compareArray.js]
----*/
-var hits = 0;
-
-function Herd(n) {
-  assert.sameValue(arguments.length, 1);
-  assert.sameValue(n, 5);
-  hits++;
-}
-
-Herd.of = Array.of;
-Herd.of("sheep", "cattle", "elephants", "whales", "seals");
-assert.sameValue(hits, 1);

test/built-ins/Array/of/S22.1.2.3_T1.js

@@ -1,24 +0,0 @@
-// Copyright (c) 2014 Hank Yates. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-es6id: 22.1.2.3_T1
-description: Testing Array#of when passed Strings
-author: Hank Yates (hankyates@gmail.com)
-includes: [runTestCase.js]
----*/
-
-runTestCase(function () {
-  var testArr = Array.of('testString', 'anotherTestString');
-
-  if (testArr[0] !== 'testString') {
-    return false;
-  }
-
-  if (testArr[1] !== 'anotherTestString') {
-    return false;
-  }
-
-  return true;
-
-});

test/built-ins/Array/of/S22.1.2.3_T2.js

@@ -1,24 +0,0 @@
-// Copyright (c) 2014 Hank Yates. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-es6id: 22.1.2.3_T2
-description: Testing Array#of when passed single argument
-author: Hank Yates (hankyates@gmail.com)
-includes: [runTestCase.js]
----*/
-
-runTestCase(function () {
-  var testArr = Array.of(3);
-
-  if (testArr.length !== 1) {
-    return false;
-  }
-
-  if (testArr[0] !== 3) {
-    return false;
-  }
-
-  return true;
-
-});

test/built-ins/Array/of/construct-this-with-the-number-of-arguments.js

@@ -0,0 +1,38 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: Passes the number of arguments to the constructor it calls.
+info: >
+  Array.of ( ...items )
+
+  1. Let len be the actual number of arguments passed to this function.
+  2. Let items be the List of arguments passed to this function.
+  3. Let C be the this value.
+  4. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  ...
+---*/
+
+var length;
+var hits = 0;
+
+function C(len) {
+  length = len;
+  hits++;
+}
+
+Array.of.call(C);
+assert.sameValue(length, 0, '`Array.of.call(C);` called `new C(0)`');
+assert.sameValue(hits, 1, 'Called constructor once per call');
+
+Array.of.call(C, 'a', 'b')
+assert.sameValue(length, 2, '`Array.of.call(C, "a", "b"));` called `new C(2)`');
+assert.sameValue(hits, 2, 'Called constructor once per call');
+
+Array.of.call(C, false, null, undefined);
+assert.sameValue(
+  length, 3,
+  '`Array.of.call(C, false, null, undefined);` called `new C(3)`'
+);
+assert.sameValue(hits, 3, 'Called constructor once per call');

test/built-ins/Array/of/creates-a-new-array-from-arguments.js

@@ -0,0 +1,44 @@
+// Copyright (c) 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Array.of method creates a new Array with a variable number of arguments.
+info: >
+  22.1.2.3 Array.of ( ...items )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    a. Let kValue be items[k].
+    b. Let Pk be ToString(k).
+    c. Let defineStatus be CreateDataPropertyOrThrow(A,Pk, kValue).
+    d. ReturnIfAbrupt(defineStatus).
+    e. Increase k by 1.
+  9. Let setStatus be Set(A, "length", len, true).
+  10. ReturnIfAbrupt(setStatus).
+  11. Return A.
+---*/
+
+var a1 = Array.of('Mike', 'Rick', 'Leo');
+assert.sameValue(
+  a1.length, 3,
+  'The new array length is the same as the arguments size'
+);
+assert.sameValue(a1[0], 'Mike', 'set each property in order - #1');
+assert.sameValue(a1[1], 'Rick', 'set each property in order - #2');
+assert.sameValue(a1[2], 'Leo', 'set each property in order - #3');
+
+var a2 = Array.of(undefined, false, null, undefined);
+assert.sameValue(
+  a2.length, 4,
+  'Creates an array from the arguments, regarless of their type values'
+);
+assert.sameValue(a2[0], undefined, 'set each property in order - #1');
+assert.sameValue(a2[1], false, 'set each property in order - #2');
+assert.sameValue(a2[2], null, 'set each property in order - #3');
+assert.sameValue(a2[3], undefined, 'set each property in order - #4');
+
+var a3 = Array.of();
+assert.sameValue(a3.length, 0, 'Array.of() returns an empty array');

test/built-ins/Array/of/does-not-use-prototype-properties.js

@@ -0,0 +1,29 @@
+// Copyright (c) 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: Array.of does not use prototype properties for arguments.
+info: >
+  It defines elements rather than assigning to them.
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function(v) {
+    $ERROR('Should define own properties');
+  }
+});
+
+var arr = Array.of(true);
+assert.sameValue(arr[0], true);
+
+function Custom() {}
+
+Object.defineProperty(Custom.prototype, "0", {
+  set: function(v) {
+    $ERROR('Should define own properties');
+  }
+});
+
+var custom = Array.of.call(Custom, true);
+assert.sameValue(custom[0], true);

test/built-ins/Array/of/length.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Array.of.length value and property descriptor
+info: >
+  Array.of ( ...items )
+
+  The length property of the of function is 0.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.of.length, 0,
+  'The value of `Array.of.length` is `0`'
+);
+
+verifyNotEnumerable(Array.of, 'length');
+verifyNotWritable(Array.of, 'length');
+verifyConfigurable(Array.of, 'length');

test/built-ins/Array/of/name.js

@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Array.of.name value and property descriptor
+info: >
+  Array.of ( ...items )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.of.name, 'of',
+  'The value of `Array.of.name` is `"of"`'
+);
+
+verifyNotEnumerable(Array.of, 'name');
+verifyNotWritable(Array.of, 'name');
+verifyConfigurable(Array.of, 'name');

test/built-ins/Array/of/not-a-constructor.js

@@ -0,0 +1,11 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Array.of is not a constructor.
+---*/
+
+assert.throws(TypeError, function() {
+  new Array.of();
+});

test/built-ins/Array/of/of.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Array.of property descriptor
+info: >
+  Array.of ( ...items )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+verifyNotEnumerable(Array, 'of');
+verifyWritable(Array, 'of');
+verifyConfigurable(Array, 'of');

test/built-ins/Array/of/return-a-custom-instance.js

@@ -0,0 +1,37 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Returns an instance from a custom constructor.
+info: >
+  Array.of ( ...items )
+
+  ...
+  4. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  ...
+  11. Return A.
+---*/
+
+function Coop() {}
+
+var coop = Array.of.call(Coop, 'Mike', 'Rick', 'Leo');
+
+assert.sameValue(
+  coop.length, 3,
+  'Sets a length property with the number of arguments'
+);
+assert.sameValue(
+  coop[0], 'Mike',
+  'Sets each argument in order as integer properties - #1 argument'
+);
+assert.sameValue(
+  coop[1], 'Rick',
+  'Sets each argument in order as integer properties - #2 argument'
+);
+assert.sameValue(
+  coop[2], 'Leo',
+  'Sets each argument in order as integer properties - #3 argument'
+);
+assert(coop instanceof Coop, 'Returns an instance from a custom constructor');

test/built-ins/Array/of/return-a-new-array-object.js

@@ -0,0 +1,40 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Returns a new Array.
+info: >
+  Array.of ( ...items )
+
+  1. Let len be the actual number of arguments passed to this function.
+  2. Let items be the List of arguments passed to this function.
+  3. Let C be the this value.
+  4. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  5. Else,
+    b. Let A be ArrayCreate(len).
+  ...
+  11. Return A.
+---*/
+
+var result = Array.of();
+assert(result instanceof Array, 'Array.of() returns a new Array');
+
+result = Array.of.call(undefined);
+assert(
+  result instanceof Array,
+  'this is not a constructor'
+);
+
+result = Array.of.call(Math.cos);
+assert(
+  result instanceof Array,
+  'this is a builtin function with no [[Construct]] slot'
+);
+
+result = Array.of.call(Math.cos.bind(Math));
+assert(
+  result instanceof Array,
+  'this is a bound builtin function with no [[Construct]] slot'
+);

test/built-ins/Array/of/return-abrupt-from-contructor.js

@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Return abrupt from this' constructor
+info: >
+  Array.of ( ...items )
+
+  1. Let len be the actual number of arguments passed to this function.
+  2. Let items be the List of arguments passed to this function.
+  3. Let C be the this value.
+  4. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  5. Else,
+    b. Let A be ArrayCreate(len).
+  6. ReturnIfAbrupt(A).
+  ...
+---*/
+
+function T() {
+  throw new Test262Error();
+}
+
+assert.throws(Test262Error, function() {
+  Array.of.call(T);
+});

test/built-ins/Array/of/return-abrupt-from-data-property-using-proxy.js

@@ -0,0 +1,38 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Return abrupt from Data Property creation
+info: >
+  Array.of ( ...items )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    a. Let kValue be items[k].
+    b. Let Pk be ToString(k).
+    c. Let defineStatus be CreateDataPropertyOrThrow(A,Pk, kValue).
+    d. ReturnIfAbrupt(defineStatus).
+  ...
+
+  7.3.6 CreateDataPropertyOrThrow (O, P, V)
+
+  ...
+  3. Let success be CreateDataProperty(O, P, V).
+  4. ReturnIfAbrupt(success).
+  ...
+features: [Proxy]
+---*/
+
+function T() {
+  return new Proxy({}, {
+    defineProperty: function() {
+      throw new Test262Error();
+    }
+  });
+}
+
+assert.throws(Test262Error, function() {
+  Array.of.call(T, 'Bob');
+});

test/built-ins/Array/of/return-abrupt-from-data-property.js

@@ -0,0 +1,46 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Return abrupt from Data Property creation
+info: >
+  Array.of ( ...items )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    a. Let kValue be items[k].
+    b. Let Pk be ToString(k).
+    c. Let defineStatus be CreateDataPropertyOrThrow(A,Pk, kValue).
+    d. ReturnIfAbrupt(defineStatus).
+  ...
+
+  7.3.6 CreateDataPropertyOrThrow (O, P, V)
+
+  ...
+  3. Let success be CreateDataProperty(O, P, V).
+  4. ReturnIfAbrupt(success).
+  5. If success is false, throw a TypeError exception.
+  ...
+---*/
+
+function T1() {
+  Object.preventExtensions(this);
+}
+
+assert.throws(TypeError, function() {
+  Array.of.call(T1, 'Bob');
+});
+
+function T2() {
+  Object.defineProperty(this, 0, {
+    configurable: false,
+    writable: true,
+    enumerable: true
+  });
+}
+
+assert.throws(TypeError, function() {
+  Array.of.call(T2, 'Bob');
+})

test/built-ins/Array/of/return-abrupt-from-setting-length.js

@@ -0,0 +1,26 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Return abrupt from setting the length property.
+info: >
+  Array.of ( ...items )
+
+  ...
+  9. Let setStatus be Set(A, "length", len, true).
+  10. ReturnIfAbrupt(setStatus).
+  ...
+---*/
+
+function T() {
+  Object.defineProperty(this, 'length', {
+    set: function() {
+      throw new Test262Error();
+    }
+  });
+}
+
+assert.throws(Test262Error, function() {
+  Array.of.call(T);
+});

test/built-ins/Array/of/sets-length.js

@@ -0,0 +1,36 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.3
+description: >
+  Calls the length setter if available
+info: >
+  Array.of ( ...items )
+
+  ...
+  9. Let setStatus be Set(A, "length", len, true).
+  ...
+---*/
+
+var hits = 0;
+var value;
+var _this_;
+
+function Pack() {
+  Object.defineProperty(this, "length", {
+    set: function(len) {
+      hits++;
+      value = len;
+      _this_ = this;
+    }
+  });
+}
+
+var result = Array.of.call(Pack, 'wolves', 'cards', 'cigarettes', 'lies');
+
+assert.sameValue(hits, 1, 'instance length setter called once');
+assert.sameValue(
+  value, 4,
+  'setter is called with the number of Array.of arguments'
+);
+assert.sameValue(_this_, result, 'setter is called with the new object');