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21 lines
649 B
JavaScript
21 lines
649 B
JavaScript
// Copyright (C) 2013 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: 19.4
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description: >
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Object.preventExtensions(obj) where obj contains symbol properties.
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flags: [noStrict]
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features: [Symbol]
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---*/
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var symA = Symbol("A");
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var symB = Symbol("B");
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var obj = {};
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obj[symA] = 1;
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Object.preventExtensions(obj);
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obj[symA] = 2;
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obj[symB] = 1;
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assert.sameValue(obj[symA], 2, "The value of `obj[symA]` is `2`");
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assert.sameValue(delete obj[symA], true, "`delete obj[symA]` is `true`");
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assert.sameValue(obj[symB], undefined, "The value of `obj[symB]` is `undefined`");
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