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33 lines
1.1 KiB
JavaScript
33 lines
1.1 KiB
JavaScript
// Copyright (c) 2012 Ecma International. 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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es5id: 15.2.3.6-4-337
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description: >
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ES5 Attributes - fail to update [[Enumerable]] attribute of data
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property ([[Writable]] is true, [[Enumerable]] is true,
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[[Configurable]] is false) to different value
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---*/
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var obj = {};
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Object.defineProperty(obj, "prop", {
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value: 2010,
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writable: true,
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enumerable: true,
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configurable: false
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});
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var propertyDefineCorrect = obj.hasOwnProperty("prop");
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var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
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assert.throws(TypeError, function() {
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Object.defineProperty(obj, "prop", {
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enumerable: false
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});
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});
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var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
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assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
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assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
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assert.sameValue(obj.prop, 2010, 'obj.prop');
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assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
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