test/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-13.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.

/*---
es5id: 15.4.4.22-9-b-13
description: >
    Array.prototype.reduceRight - deleting own property with prototype
    property in step 8 causes prototype index property to be visited
    on an Array
---*/

        var testResult = false;

        function callbackfn(prevVal, curVal, idx, obj) {
            if (idx === 1 && curVal === 1) {
                testResult = true;
            }
        }
        var arr = [0, 111];

        Object.defineProperty(arr, "2", {
            get: function () {
                delete arr[1];
                return 0;
            },
            configurable: true
        });

            Array.prototype[1] = 1;
            arr.reduceRight(callbackfn);

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