JSTests/test262/test/built-ins/Array/prototype/map/15.4.4.19-8-c-i-28.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-28
description: >
    Array.prototype.map - element changed by getter on previous
    iterations is observed on an Array
---*/

        var preIterVisible = false;
        var arr = [];

        function callbackfn(val, idx, obj) {
            if (idx === 0) {
                return val === 11;
            } else if (idx === 1) {
                return val === 9;
            } else {
                return false;
            }
        }

        Object.defineProperty(arr, "0", {
            get: function () {
                preIterVisible = true;
                return 11;
            },
            configurable: true
        });

        Object.defineProperty(arr, "1", {
            get: function () {
                if (preIterVisible) {
                    return 9;
                } else {
                    return 11;
                }
            },
            configurable: true
        });

        var testResult = arr.map(callbackfn);

assert.sameValue(testResult[0], true, 'testResult[0]');
assert.sameValue(testResult[1], true, 'testResult[1]');