external/contributions/Microsoft/ietcLatest/TestCases/ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-2-9.js


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/// 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 ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-2-9.js
 * @description Array.prototype.lastIndexOf - 'length' is own accessor property that overrides an inherited accessor property on an Array-like object
 */


function testcase() {
        var proto = {};
        Object.defineProperty(proto, "length", {
            get: function () {
                return 0;
            },
            configurable: true
        });

        var Con = function () {};
        Con.prototype = proto;

        var child = new Con();
        child[1] = true;

        Object.defineProperty(child, "length", {
            get: function () {
                return 2;
            },
            configurable: true
        });

        return Array.prototype.lastIndexOf.call(child, true) === 1;
    }
runTestCase(testcase);