/// Copyright (c) 2012 Ecma International. All rights reserved. /// Ecma International makes this code available under the terms and conditions set /// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the /// "Use Terms"). Any redistribution of this code must retain the above /// copyright and this notice and otherwise comply with the Use Terms. /** * @path ch15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-408.js * @description ES5 Attributes - Successfully add a property to an object when the object's prototype has a property with same name and [[Writable]] attribute is set to true (Date instance) */ function testcase() { try { Object.defineProperty(Date.prototype, "prop", { value: 1001, writable: true, enumerable: true, configurable: true }); var dateObj = new Date(); dateObj.prop = 1002; return dateObj.hasOwnProperty("prop") && dateObj.prop === 1002; } finally { delete Date.prototype.prop; } } runTestCase(testcase);