mirror of https://github.com/tc39/test262.git
55 lines
2.0 KiB
JavaScript
55 lines
2.0 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 class method 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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class C {
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a() { return 'A'; }
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[sym1]() { return 'B'; }
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c() { return 'C'; }
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[ID(sym2)]() { return 'D'; }
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}
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assert.sameValue(new C().a(), 'A', "`new C().a()` returns `'A'`. Defined as `a() { return 'A'; }`");
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assert.sameValue(new C()[sym1](), 'B', "`new C()[sym1]()` returns `'B'`. Defined as `[sym1]() { return 'B'; }`");
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assert.sameValue(new C().c(), 'C', "`new C().c()` returns `'C'`. Defined as `c() { return 'C'; }`");
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assert.sameValue(new C()[sym2](), 'D', "`new C()[sym2]()` returns `'D'`. Defined as `[ID(sym2)]() { return 'D'; }`");
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assert(
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compareArray(Object.keys(C.prototype), []),
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"`compareArray(Object.keys(C.prototype), [])` returns `true`"
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);
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assert(
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compareArray(Object.getOwnPropertyNames(C.prototype), ['constructor', 'a', 'c']),
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"`compareArray(Object.getOwnPropertyNames(C.prototype), ['constructor', '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(C.prototype);
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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(C.prototype);`"
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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(C.prototype);`"
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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(C.prototype);`");
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