JSTests/test262/test/built-ins/Array/prototype/map/15.4.4.19-8-c-i-3.js

// 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.map
es5id: 15.4.4.19-8-c-i-3
description: >
    Array.prototype.map - element to be retrieved is own data property
    that overrides an inherited data property on an Array-like object
---*/

        var kValue = "abc";

        function callbackfn(val, idx, obj) {
            if (idx === 5) {
                return val === kValue;
            }
            return false;
        }

        var proto = { 5: 12, length: 10 };

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

        var child = new Con();
        child[5] = kValue;

        var testResult = Array.prototype.map.call(child, callbackfn);

assert.sameValue(testResult[5], true, 'testResult[5]');