/// 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 ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-8-a-2.js * @description Array.prototype.lastIndexOf - added properties in step 5 are visible here on an Array-like object */ function testcase() { var arr = { length: 30 }; var targetObj = function () { }; var fromIndex = { valueOf: function () { arr[4] = targetObj; return 10; } }; return 4 === Array.prototype.lastIndexOf.call(arr, targetObj, fromIndex); } runTestCase(testcase);