mirror of https://github.com/tc39/test262.git
51 lines
1.8 KiB
JavaScript
51 lines
1.8 KiB
JavaScript
// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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es6id: 12.2.5
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description: >
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computed property names can be a symbol
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includes: [compareArray.js]
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---*/
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function ID(x) {
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return x;
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}
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var sym1 = Symbol();
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var sym2 = Symbol();
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var object = {
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a: 'A',
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[sym1]: 'B',
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c: 'C',
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[ID(sym2)]: 'D',
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};
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assert.sameValue(object.a, 'A', "The value of `object.a` is `'A'`. Defined in `object` as `a: 'A'`");
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assert.sameValue(object[sym1], 'B', "The value of `object[sym1]` is `'B'`. Defined in `object` as `[sym1]: 'B'`");
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assert.sameValue(object.c, 'C', "The value of `object.c` is `'C'`. Defined in `object` as `c: 'C'`");
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assert.sameValue(object[sym2], 'D', "The value of `object[sym2]` is `'D'`. Defined in `object` as `[ID(sym2)]: 'D'`");
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assert(
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compareArray(Object.keys(object), ['a', 'c']),
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"`compareArray(Object.keys(object), ['a', 'c'])` returns `true`"
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);
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// compareArray expects arguments to be sorted,
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// which will cause an array containing symbols to
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// throw an exception when toString() is called.
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//
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// Since there is no guarantee of order:
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//
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// - Assert only that the symbol is present
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// - Assert that the length is correct
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//
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var symbols = Object.getOwnPropertySymbols(object);
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assert(
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symbols.indexOf(sym1) !== -1,
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"The result of `symbols.indexOf(sym1) !== -1` is `true`, after executing `var symbols = Object.getOwnPropertySymbols(object);`"
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);
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assert(
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symbols.indexOf(sym2) !== -1,
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"The result of `symbols.indexOf(sym2) !== -1` is `true`, after executing `var symbols = Object.getOwnPropertySymbols(object);`"
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);
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assert.sameValue(symbols.length, 2, "The value of `symbols.length` is `2`, after executing `var symbols = Object.getOwnPropertySymbols(object);`");
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