/// 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 ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-3-4.js * @description Array.prototype.lastIndexOf - value of 'length' is a number (value is -0) */ function testcase() { var obj = { 0: true, length: -0 }; return Array.prototype.lastIndexOf.call(obj, true) === -1; } runTestCase(testcase);