test/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-31.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-1-31
description: >
    Array.prototype.reduceRight - element changed by getter on current
    iteration is observed subsequetly on an Array-like object
---*/

        var testResult = false;
        function callbackfn(prevVal, curVal, idx, obj) {
            if (idx === 1) {
                testResult = (prevVal === 2 && curVal === 1);
            }
        }

        var obj = { 0: 0, length: 3 };
        var preIterVisible = false;

        Object.defineProperty(obj, "1", {
            get: function () {
                if (preIterVisible) {
                    return 1;
                } else {
                    return "20";
                }
            },
            configurable: true
        });

        Object.defineProperty(obj, "2", {
            get: function () {
                preIterVisible = true;
                return 2;
            },
            configurable: true
        });

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

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