JSTests/test262/test/built-ins/Array/prototype/map/15.4.4.19-8-c-i-20.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-20
description: >
    Array.prototype.map - element to be retrieved is own accessor
    property without a get function that overrides an inherited
    accessor property on an Array-like object
---*/

        function callbackfn(val, idx, obj) {
            if (idx === 0) {
                return typeof val === "undefined";
            }
            return false;
        }

        var proto = {};

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

        var child = new Con();
        child.length = 2;

        Object.defineProperty(child, "0", {
            set: function () { },
            configurable: true
        });

        Object.defineProperty(proto, "0", {
            get: function () {
                return 100;
            },
            configurable: true
        });

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

assert.sameValue(testResult[0], true, 'testResult[0]');