test/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-3.js


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// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-array.prototype.reduceright
es5id: 15.4.4.22-8-b-iii-1-3
description: >
    Array.prototype.reduceRight - element to be retrieved is own data
    property that overrides an inherited data property on an
    Array-like object
---*/

        var testResult = false;
        function callbackfn(prevVal, curVal, idx, obj) {
            if (idx === 1) {
                testResult = (prevVal === "20");
            }
        }

        var proto = { 0: 0, 1: 1, 2: 2, length: 2 };
        var Con = function () { };
        Con.prototype = proto;

        var child = new Con();
        child[1] = "10";
        child[2] = "20";
        child.length = 3;

        Array.prototype.reduceRight.call(child, callbackfn);

assert(testResult, 'testResult !== true');