/// 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 ch15/15.4/15.4.4/15.4.4.16/15.4.4.16-7-b-11.js * @description Array.prototype.every - deleting property of prototype causes prototype index property not to be visited on an Array */ function testcase() { var accessed = false; function callbackfn(val, idx, obj) { accessed = true; return idx !== 1; } var arr = [0, , 2]; Object.defineProperty(arr, "0", { get: function () { delete Array.prototype[1]; return 0; }, configurable: true }); try { Array.prototype[1] = 1; return arr.every(callbackfn) && accessed; } finally { delete Array.prototype[1]; } } runTestCase(testcase);