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32 lines
1.0 KiB
JavaScript
32 lines
1.0 KiB
JavaScript
// Copyright (c) 2012 Ecma International. All rights reserved.
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// Ecma International makes this code available under the terms and conditions set
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// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
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// "Use Terms"). Any redistribution of this code must retain the above
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// copyright and this notice and otherwise comply with the Use Terms.
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/*---
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es5id: 15.2.3.6-4-410
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description: >
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ES5 Attributes - Failed to add a property to an object when the
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object's prototype has a property with the same name and
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[[Writable]] set to false (JSON)
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includes: [runTestCase.js]
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---*/
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function testcase() {
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try {
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Object.defineProperty(Object.prototype, "prop", {
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value: 1001,
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writable: false,
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enumerable: false,
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configurable: true
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});
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JSON.prop = 1002;
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return !JSON.hasOwnProperty("prop") && JSON.prop === 1001;
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} finally {
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delete Object.prototype.prop;
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}
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}
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runTestCase(testcase);
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