/// 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 ch15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-175.js * @description Object.defineProperty - 'O' is an Array, 'name' is the length property of 'O', the [[Value]] field of 'desc' is less than value of the length property, test the [[Configurable]] attribute of an inherited accessor property with large index named in 'O' can't stop deleting index named properties (15.4.5.1 step 3.l.ii) */ function testcase() { var arrObj = [0, 1]; try { Object.defineProperty(Array.prototype, "1", { get: function () { return 1; }, configurable: true // Not setting the [[Configurable]] attribute of property "1" to false here, since Array.prototype is a global object, and non-configurbale property can't revert to configurable }); Object.defineProperty(arrObj, "length", { value: 1 }); return arrObj.length === 1 && !arrObj.hasOwnProperty("1"); } finally { delete Array.prototype[1]; } } runTestCase(testcase);