/// 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 ch15/15.4/15.4.4/15.4.4.18/15.4.4.18-2-4.js * @description Array.prototype.forEach - 'length' is own data property that overrides an inherited data property on an Array */ function testcase() { var result = false; var arrProtoLen; function callbackfn(val, idx, obj) { result = (obj.length === 2); } try { arrProtoLen = Array.prototype.length; Array.prototype.length = 0; [12, 11].forEach(callbackfn); return result; } finally { Array.prototype.length = arrProtoLen; } } runTestCase(testcase);