test262/test/suite/ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-c-i-4.js

/// 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 ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-c-i-4.js
 * @description Array.prototype.reduceRight - element to be retrieved is own data property that overrides an inherited data property on an Array
 */


function testcase() {

        var testResult = false;
        function callbackfn(prevVal, curVal, idx, obj) {
            if (idx === 1) {
                testResult = (curVal === 1);
            }
        }

        try {
            Array.prototype[1] = "11";
            [0, 1, 2].reduceRight(callbackfn, "initialValue");
            return testResult;

        } finally {
            delete Array.prototype[1];
        }
    }
runTestCase(testcase);