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Avoid usage of Object.keys when asserting order of returned values (#2320) 

Fixes #2226
This commit is contained in:
Leo Balter 2019-09-04 11:38:18 -03:00 committed by GitHub
parent 841b32c6da
commit 5d84854f27
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
35 changed files with 69 additions and 66 deletions
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2
src/dstr-assignment-for-await/obj-rest-same-name.case
View File

@ -27,7 +27,7 @@ assert.sameValue(y, undefined);
assert.sameValue(z.y, 39);
assert.sameValue(z.z, 'cheeseburger');
let keys = Object.keys(z);
let keys = Object.getOwnPropertyNames(z);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'y');
assert.sameValue(keys[1], 'z');

2
src/dstr-assignment/obj-rest-same-name.case
View File

@ -27,7 +27,7 @@ assert.sameValue(y, undefined);
assert.sameValue(z.y, 39);
assert.sameValue(z.z, 'cheeseburger');
var keys = Object.keys(z);
var keys = Object.getOwnPropertyNames(z);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'y');
assert.sameValue(keys[1], 'z');

2
src/dynamic-import/ns-get-nested-namespace-dflt-direct.case
View File

@ -39,7 +39,7 @@ assert.sameValue(desc.enumerable, true, 'ns.productionNS2: is enumerable');
assert.sameValue(desc.writable, true, 'ns.productionNS2: is writable');
assert.sameValue(desc.configurable, false, 'ns.productionNS2: is non-configurable');
var keys = Object.keys(ns.productionNS2);
var keys = Object.getOwnPropertyNames(ns.productionNS2);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'default');

2
src/dynamic-import/ns-get-nested-namespace-dflt-indirect.case
View File

@ -40,7 +40,7 @@ assert.sameValue(desc.enumerable, true, 'ns.namedNS2: is enumerable');
assert.sameValue(desc.writable, true, 'ns.namedNS2: is writable');
assert.sameValue(desc.configurable, false, 'ns.namedNS2: is non-configurable');
var keys = Object.keys(ns.namedNS2);
var keys = Object.getOwnPropertyNames(ns.namedNS2);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'default');

2
test/built-ins/Object/assign/Override-notstringtarget.js
View File

@ -11,7 +11,7 @@ es6id: 19.1.2.1
var target = 12;
var result = Object.assign(target, "aaa", "bb2b", "1c");
assert.sameValue(Object.keys(result).length, 4, "The length should be 4 in the final object.");
assert.sameValue(Object.getOwnPropertyNames(result).length, 4, "The length should be 4 in the final object.");
assert.sameValue(result[0], "1", "The value should be {\"0\":\"1\"}.");
assert.sameValue(result[1], "c", "The value should be {\"1\":\"c\"}.");
assert.sameValue(result[2], "2", "The value should be {\"2\":\"2\"}.");

2
test/built-ins/Object/assign/Override.js
View File

@ -25,7 +25,7 @@ var result = Object.assign(target, "1a2c3", {
a: 5
});
assert.sameValue(Object.keys(result).length, 7, "The length should be 7 in the final object.");
assert.sameValue(Object.getOwnPropertyNames(result).length, 7, "The length should be 7 in the final object.");
assert.sameValue(result.a, 5, "The value should be {a:5}.");
assert.sameValue(result[0], "1", "The value should be {\"0\":\"1\"}.");
assert.sameValue(result[1], "a", "The value should be {\"1\":\"a\"}.");

8
test/built-ins/Object/fromEntries/key-order.js
View File

@ -16,7 +16,7 @@ var entries = [
];
var result = Object.fromEntries(entries);
assert.sameValue(result['z'], 1);
assert.sameValue(result['y'], 4);
assert.sameValue(result['x'], 3);
assert.compareArray(Object.keys(result), ['z', 'y', 'x']);
assert.sameValue(result.z, 1);
assert.sameValue(result.y, 4);
assert.sameValue(result.x, 3);
assert.compareArray(Object.getOwnPropertyNames(result), ['z', 'y', 'x']);

4
test/built-ins/Proxy/ownKeys/call-parameters-object-keys.js
View File

@ -18,12 +18,12 @@ var handler = {
ownKeys: function(t) {
_handler = this;
_target = t;
return Object.keys(t);
return Object.getOwnPropertyNames(t);
}
};
var p = new Proxy(target, handler);
var keys = Object.keys(p);
var keys = Object.getOwnPropertyNames(p);
assert.sameValue(keys[0], "foo");
assert.sameValue(keys[1], "bar");

2
test/built-ins/Proxy/ownKeys/not-extensible-return-keys.js
View File

@ -26,7 +26,7 @@ var p = new Proxy(target, {
Object.preventExtensions(target);
var keys = Object.keys(p);
var keys = Object.getOwnPropertyNames(p);
assert.sameValue(keys[0], "foo");
assert.sameValue(keys[1], "bar");

2
test/built-ins/Proxy/ownKeys/trap-is-undefined.js
View File

@ -15,7 +15,7 @@ var target = {
};
var p = new Proxy(target, {});
var keys = Object.keys(p);
var keys = Object.getOwnPropertyNames(p);
assert.sameValue(keys[0], "foo");
assert.sameValue(keys[1], "bar");

2
test/built-ins/Reflect/getOwnPropertyDescriptor/return-from-accessor-descriptor.js
View File

@ -47,7 +47,7 @@ var result = Reflect.getOwnPropertyDescriptor(o1, 'p');
assert(
compareArray(
Object.keys(result), ['get', 'set', 'enumerable', 'configurable']
Object.getOwnPropertyNames(result), ['get', 'set', 'enumerable', 'configurable']
)
);
assert.sameValue(result.enumerable, false);

2
test/built-ins/Reflect/getOwnPropertyDescriptor/return-from-data-descriptor.js
View File

@ -23,7 +23,7 @@ var result = Reflect.getOwnPropertyDescriptor(o1, 'p');
assert(
compareArray(
Object.keys(result), ['value', 'writable', 'enumerable', 'configurable']
Object.getOwnPropertyNames(result), ['value', 'writable', 'enumerable', 'configurable']
)
);
assert.sameValue(result.value, 'foo');

2
test/built-ins/Reflect/getOwnPropertyDescriptor/symbol-property.js
View File

@ -29,7 +29,7 @@ var result = Reflect.getOwnPropertyDescriptor(o, s);
assert(
compareArray(
Object.keys(result), ['value', 'writable', 'enumerable', 'configurable']
Object.getOwnPropertyNames(result), ['value', 'writable', 'enumerable', 'configurable']
)
);
assert.sameValue(result.value, 42);

4
test/language/computed-property-names/basics/number.js
View File

@ -22,6 +22,6 @@ assert.sameValue(object[1], 'B', "The value of `object[1]` is `'B'`. Defined in
assert.sameValue(object.c, 'C', "The value of `object.c` is `'C'`. Defined in `object` as `c: 'C'`");
assert.sameValue(object[2], 'D', "The value of `object[2]` is `'D'`. Defined in `object` as `[ID(2)]: 'D'`");
assert(
compareArray(Object.keys(object), ['1', '2', 'a', 'c']),
"`compareArray(Object.keys(object), ['1', '2', 'a', 'c'])` returns `true`"
compareArray(Object.getOwnPropertyNames(object), ['1', '2', 'a', 'c']),
"`compareArray(Object.getOwnPropertyNames(object), ['1', '2', 'a', 'c'])` returns `true`"
);

4
test/language/computed-property-names/basics/string.js
View File

@ -21,6 +21,6 @@ assert.sameValue(object.b, 'B', "The value of `object.b` is `'B'`. Defined in `o
assert.sameValue(object.c, 'C', "The value of `object.c` is `'C'`. Defined in `object` as `c: 'C'`");
assert.sameValue(object.d, 'D', "The value of `object.d` is `'D'`. Defined in `object` as `[ID('d')]: 'D'`");
assert(
compareArray(Object.keys(object), ['a', 'b', 'c', 'd']),
"`compareArray(Object.keys(object), ['a', 'b', 'c', 'd'])` returns `true`"
compareArray(Object.getOwnPropertyNames(object), ['a', 'b', 'c', 'd']),
"`compareArray(Object.getOwnPropertyNames(object), ['a', 'b', 'c', 'd'])` returns `true`"
);

4
test/language/computed-property-names/basics/symbol.js
View File

@ -25,8 +25,8 @@ assert.sameValue(object[sym1], 'B', "The value of `object[sym1]` is `'B'`. Defin
assert.sameValue(object.c, 'C', "The value of `object.c` is `'C'`. Defined in `object` as `c: 'C'`");
assert.sameValue(object[sym2], 'D', "The value of `object[sym2]` is `'D'`. Defined in `object` as `[ID(sym2)]: 'D'`");
assert(
compareArray(Object.keys(object), ['a', 'c']),
"`compareArray(Object.keys(object), ['a', 'c'])` returns `true`"
compareArray(Object.getOwnPropertyNames(object), ['a', 'c']),
"`compareArray(Object.getOwnPropertyNames(object), ['a', 'c'])` returns `true`"
);
assert(
compareArray(Object.getOwnPropertySymbols(object), [sym1, sym2]),

7
test/language/computed-property-names/class/method/number.js
View File

@ -21,10 +21,9 @@ assert.sameValue(new C().a(), 'A', "`new C().a()` returns `'A'`, from `a() { ret
assert.sameValue(new C()[1](), 'B', "`new C()[1]()` returns `'B'`, from `[1]() { return 'B'; }`");
assert.sameValue(new C().c(), 'C', "`new C().c()` returns `'C'`, from `c() { return 'C'; }`");
assert.sameValue(new C()[2](), 'D', "`new C()[2]()` returns `'D'`, from `[ID(2)]() { return 'D'; }`");
assert(
compareArray(Object.keys(C.prototype), []),
"`compareArray(Object.keys(C.prototype), [])` returns `true`"
);
assert.sameValue(Object.keys(C.prototype).length, 0, "No enum keys from C.prototype");
assert(
compareArray(Object.getOwnPropertyNames(C.prototype), ['1', '2', 'constructor', 'a', 'c']),
"`compareArray(Object.getOwnPropertyNames(C.prototype), ['1', '2', 'constructor', 'a', 'c'])` returns `true`"

5
test/language/computed-property-names/class/method/string.js
View File

@ -21,10 +21,7 @@ assert.sameValue(new C().a(), 'A', "`new C().a()` returns `'A'`. Defined as `a()
assert.sameValue(new C().b(), 'B', "`new C().b()` returns `'B'`. Defined as `['b']() { return 'B'; }`");
assert.sameValue(new C().c(), 'C', "`new C().c()` returns `'C'`. Defined as `c() { return 'C'; }`");
assert.sameValue(new C().d(), 'D', "`new C().d()` returns `'D'`. Defined as `[ID('d')]() { return 'D'; }`");
assert(
compareArray(Object.keys(C.prototype), []),
"`compareArray(Object.keys(C.prototype), [])` returns `true`"
);
assert.sameValue(Object.keys(C.prototype).length, 0, "No enum keys from C.prototype");
assert(
compareArray(Object.getOwnPropertyNames(C.prototype), ['constructor', 'a', 'b', 'c', 'd']),
"`compareArray(Object.getOwnPropertyNames(C.prototype), ['constructor', 'a', 'b', 'c', 'd'])` returns `true`"

5
test/language/computed-property-names/class/method/symbol.js
View File

@ -24,10 +24,7 @@ assert.sameValue(new C().a(), 'A', "`new C().a()` returns `'A'`. Defined as `a()
assert.sameValue(new C()[sym1](), 'B', "`new C()[sym1]()` returns `'B'`. Defined as `[sym1]() { return 'B'; }`");
assert.sameValue(new C().c(), 'C', "`new C().c()` returns `'C'`. Defined as `c() { return 'C'; }`");
assert.sameValue(new C()[sym2](), 'D', "`new C()[sym2]()` returns `'D'`. Defined as `[ID(sym2)]() { return 'D'; }`");
assert(
compareArray(Object.keys(C.prototype), []),
"`compareArray(Object.keys(C.prototype), [])` returns `true`"
);
assert.sameValue(Object.keys(C.prototype).length, 0, "No enum keys from C.prototype");
assert(
compareArray(Object.getOwnPropertyNames(C.prototype), ['constructor', 'a', 'c']),
"`compareArray(Object.getOwnPropertyNames(C.prototype), ['constructor', 'a', 'c'])` returns `true`"

4
test/language/computed-property-names/object/method/number.js
View File

@ -22,6 +22,6 @@ assert.sameValue(object[1](), 'B', "`object[1]()` returns `'B'`. Defined as `[1]
assert.sameValue(object.c(), 'C', "`object.c()` returns `'C'`. Defined as `c() { return 'C'; }`");
assert.sameValue(object[2](), 'D', "`object[2]()` returns `'D'`. Defined as `[ID(2)]() { return 'D'; }`");
assert(
compareArray(Object.keys(object), ['1', '2', 'a', 'c']),
"`compareArray(Object.keys(object), ['1', '2', 'a', 'c'])` returns `true`"
compareArray(Object.getOwnPropertyNames(object), ['1', '2', 'a', 'c']),
"`compareArray(Object.getOwnPropertyNames(object), ['1', '2', 'a', 'c'])` returns `true`"
);

4
test/language/computed-property-names/object/method/string.js
View File

@ -22,6 +22,6 @@ assert.sameValue(object.b(), 'B', "`object.b()` returns `'B'`. Defined as `['b']
assert.sameValue(object.c(), 'C', "`object.c()` returns `'C'`. Defined as `c() { return 'C'; }`");
assert.sameValue(object.d(), 'D', "`object.d()` returns `'D'`. Defined as `[ID('d')]() { return 'D'; }`");
assert(
compareArray(Object.keys(object), ['a', 'b', 'c', 'd']),
"`compareArray(Object.keys(object), ['a', 'b', 'c', 'd'])` returns `true`"
compareArray(Object.getOwnPropertyNames(object), ['a', 'b', 'c', 'd']),
"`compareArray(Object.getOwnPropertyNames(object), ['a', 'b', 'c', 'd'])` returns `true`"
);

4
test/language/computed-property-names/object/method/symbol.js
View File

@ -25,8 +25,8 @@ assert.sameValue(object[sym1](), 'B', "`object[sym1]()` returns `'B'`. Defined a
assert.sameValue(object.c(), 'C', "`object.c()` returns `'C'`. Defined as `c() { return 'C'; }`");
assert.sameValue(object[sym2](), 'D', "`object[sym2]()` returns `'D'`. Defined as `[ID(sym2)]() { return 'D'; }`");
assert(
compareArray(Object.keys(object), ['a', 'c']),
"`compareArray(Object.keys(object), ['a', 'c'])` returns `true`"
compareArray(Object.getOwnPropertyNames(object), ['a', 'c']),
"`compareArray(Object.getOwnPropertyNames(object), ['a', 'c'])` returns `true`"
);
assert(
compareArray(Object.getOwnPropertySymbols(object), [sym1, sym2]),

17
test/language/computed-property-names/to-name-side-effects/class.js
View File

@ -7,15 +7,19 @@ description: >
includes: [compareArray.js]
---*/
var counter = 0;
var key1ToString = [];
var key2ToString = [];
var key1 = {
toString: function() {
assert.sameValue(counter++, 0, "The result of `counter++` is `0`");
key1ToString.push(counter);
counter += 1;
return 'b';
}
};
var key2 = {
toString: function() {
assert.sameValue(counter++, 1, "The result of `counter++` is `1`");
key2ToString.push(counter);
counter += 1;
return 'd';
}
};
@ -25,15 +29,16 @@ class C {
c() { return 'C'; }
[key2]() { return 'D'; }
}
assert.compareArray(key1ToString, [0], "order set for key1");
assert.compareArray(key2ToString, [1], "order set for key2");
assert.sameValue(counter, 2, "The value of `counter` is `2`");
assert.sameValue(new C().a(), 'A', "`new C().a()` returns `'A'`. Defined as `a() { return 'A'; }`");
assert.sameValue(new C().b(), 'B', "`new C().b()` returns `'B'`. Defined as `[key1]() { return 'B'; }`");
assert.sameValue(new C().c(), 'C', "`new C().c()` returns `'C'`. Defined as `c() { return 'C'; }`");
assert.sameValue(new C().d(), 'D', "`new C().d()` returns `'D'`. Defined as `[key2]() { return 'D'; }`");
assert(
compareArray(Object.keys(C.prototype), []),
"`compareArray(Object.keys(C.prototype), [])` returns `true`"
);
assert.sameValue(Object.keys(C.prototype).length, 0, "No enum keys from C.prototype");
assert(
compareArray(Object.getOwnPropertyNames(C.prototype), ['constructor', 'a', 'b', 'c', 'd']),
"`compareArray(Object.getOwnPropertyNames(C.prototype), ['constructor', 'a', 'b', 'c', 'd'])` returns `true`"

17
test/language/computed-property-names/to-name-side-effects/numbers-class.js
View File

@ -7,16 +7,20 @@ description: >
includes: [compareArray.js]
---*/
var counter = 0;
var key1vof = [];
var key2vof = [];
var key1 = {
valueOf: function() {
assert.sameValue(counter++, 0, "The result of `counter++` is `0`");
key1vof.push(counter);
counter += 1;
return 1;
},
toString: null
};
var key2 = {
valueOf: function() {
assert.sameValue(counter++, 1, "The result of `counter++` is `1`");
key2vof.push(counter);
counter += 1;
return 2;
},
toString: null
@ -28,15 +32,16 @@ class C {
c() { return 'C'; }
[key2]() { return 'D'; }
}
assert.compareArray(key1vof, [0], "order set for key1");
assert.compareArray(key2vof, [1], "order set for key2");
assert.sameValue(counter, 2, "The value of `counter` is `2`");
assert.sameValue(new C().a(), 'A', "`new C().a()` returns `'A'`. Defined as `a() { return 'A'; }`");
assert.sameValue(new C()[1](), 'B', "`new C()[1]()` returns `'B'`. Defined as `[key1]() { return 'B'; }`");
assert.sameValue(new C().c(), 'C', "`new C().c()` returns `'C'`. Defined as `c() { return 'C'; }`");
assert.sameValue(new C()[2](), 'D', "`new C()[2]()` returns `'D'`. Defined as `[key2]() { return 'D'; }`");
assert(
compareArray(Object.keys(C.prototype), []),
"`compareArray(Object.keys(C.prototype), [])` returns `true`"
);
assert.sameValue(Object.keys(C.prototype).length, 0, "No enum keys from C.prototype");
assert(
compareArray(Object.getOwnPropertyNames(C.prototype), ['1', '2', 'constructor', 'a', 'c']),
"`compareArray(Object.getOwnPropertyNames(C.prototype), ['1', '2', 'constructor', 'a', 'c'])` returns `true`"

4
test/language/computed-property-names/to-name-side-effects/numbers-object.js
View File

@ -34,6 +34,6 @@ assert.sameValue(object[1], 'B', "The value of `object[1]` is `'B'`. Defined as
assert.sameValue(object.c, 'C', "The value of `object.c` is `'C'`. Defined as `c: 'C'`");
assert.sameValue(object[2], 'D', "The value of `object[2]` is `'D'`. Defined as `[key2]: 'D'`");
assert(
compareArray(Object.keys(object), ['1', '2', 'a', 'c']),
"`compareArray(Object.keys(object), ['1', '2', 'a', 'c'])` returns `true`"
compareArray(Object.getOwnPropertyNames(object), ['1', '2', 'a', 'c']),
"`compareArray(Object.getOwnPropertyNames(object), ['1', '2', 'a', 'c'])` returns `true`"
);

4
test/language/computed-property-names/to-name-side-effects/object.js
View File

@ -31,6 +31,6 @@ assert.sameValue(object.b(), 'B', "`object.b()` returns `'B'`. Defined as `[key1
assert.sameValue(object.c(), 'C', "`object.c()` returns `'C'`. Defined as `c() { return 'C'; }`");
assert.sameValue(object.d(), 'D', "`object.d()` returns `'D'`. Defined as `[key2]() { return 'D'; }`");
assert(
compareArray(Object.keys(object), ['a', 'b', 'c', 'd']),
"`compareArray(Object.keys(object), ['a', 'b', 'c', 'd'])` returns `true`"
compareArray(Object.getOwnPropertyNames(object), ['a', 'b', 'c', 'd']),
"`compareArray(Object.getOwnPropertyNames(object), ['a', 'b', 'c', 'd'])` returns `true`"
);

2
test/language/expressions/assignment/dstr/obj-rest-same-name.js
View File

@ -33,7 +33,7 @@ assert.sameValue(y, undefined);
assert.sameValue(z.y, 39);
assert.sameValue(z.z, 'cheeseburger');
var keys = Object.keys(z);
var keys = Object.getOwnPropertyNames(z);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'y');
assert.sameValue(keys[1], 'z');

2
test/language/expressions/dynamic-import/namespace/await-ns-get-nested-namespace-dflt-direct.js
View File

@ -102,7 +102,7 @@ async function fn() {
assert.sameValue(desc.writable, true, 'ns.productionNS2: is writable');
assert.sameValue(desc.configurable, false, 'ns.productionNS2: is non-configurable');
var keys = Object.keys(ns.productionNS2);
var keys = Object.getOwnPropertyNames(ns.productionNS2);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'default');

2
test/language/expressions/dynamic-import/namespace/await-ns-get-nested-namespace-dflt-indirect.js
View File

@ -102,7 +102,7 @@ async function fn() {
assert.sameValue(desc.writable, true, 'ns.namedNS2: is writable');
assert.sameValue(desc.configurable, false, 'ns.namedNS2: is non-configurable');
var keys = Object.keys(ns.namedNS2);
var keys = Object.getOwnPropertyNames(ns.namedNS2);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'default');

2
test/language/expressions/dynamic-import/namespace/promise-then-ns-get-nested-namespace-dflt-direct.js
View File

@ -101,7 +101,7 @@ import('./get-nested-namespace-dflt-skip-prod_FIXTURE.js').then(ns => {
assert.sameValue(desc.writable, true, 'ns.productionNS2: is writable');
assert.sameValue(desc.configurable, false, 'ns.productionNS2: is non-configurable');
var keys = Object.keys(ns.productionNS2);
var keys = Object.getOwnPropertyNames(ns.productionNS2);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'default');

2
test/language/expressions/dynamic-import/namespace/promise-then-ns-get-nested-namespace-dflt-indirect.js
View File

@ -101,7 +101,7 @@ import('./get-nested-namespace-dflt-skip-named_FIXTURE.js').then(ns => {
assert.sameValue(desc.writable, true, 'ns.namedNS2: is writable');
assert.sameValue(desc.configurable, false, 'ns.namedNS2: is non-configurable');
var keys = Object.keys(ns.namedNS2);
var keys = Object.getOwnPropertyNames(ns.namedNS2);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'default');

2
test/language/expressions/object/computed-property-evaluation-order.js
View File

@ -15,7 +15,7 @@ var o = {
[++counter]: ++counter,
}
var keys = Object.keys(o);
var keys = Object.getOwnPropertyNames(o);
assert.sameValue(keys.length, 3, '3 PropertyDefinitions should result in 3 properties');
assert.sameValue(keys[0], '1');

2
test/language/statements/for-await-of/async-func-decl-dstr-obj-rest-same-name.js
View File

@ -40,7 +40,7 @@ async function fn() {
assert.sameValue(z.y, 39);
assert.sameValue(z.z, 'cheeseburger');
let keys = Object.keys(z);
let keys = Object.getOwnPropertyNames(z);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'y');
assert.sameValue(keys[1], 'z');

2
test/language/statements/for-await-of/async-gen-decl-dstr-obj-rest-same-name.js
View File

@ -40,7 +40,7 @@ async function * fn() {
assert.sameValue(z.y, 39);
assert.sameValue(z.z, 'cheeseburger');
let keys = Object.keys(z);
let keys = Object.getOwnPropertyNames(z);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'y');
assert.sameValue(keys[1], 'z');

2
test/language/statements/for-of/dstr/obj-rest-same-name.js
View File

@ -40,7 +40,7 @@ for ({ x, ...z } of [o]) {
assert.sameValue(z.y, 39);
assert.sameValue(z.z, 'cheeseburger');
var keys = Object.keys(z);
var keys = Object.getOwnPropertyNames(z);
assert.sameValue(keys.length, 2);
assert.sameValue(keys[0], 'y');
assert.sameValue(keys[1], 'z');