JSTests/test262/test/built-ins/Array/prototype/map/15.4.4.19-8-9.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: 15.4.4.19-8-9
description: >
    Array.prototype.map - modifications to length don't change number
    of iterations on an Array
---*/

        var called = 0;
        function callbackfn(val, idx, obj) {
            called += 1;
            return val > 10;
        }

        var arr = [9, , 12];

        Object.defineProperty(arr, "1", {
            get: function () {
                arr.length = 2;
                return 8;
            },
            configurable: true
        });

        var testResult = arr.map(callbackfn);

assert.sameValue(testResult.length, 3, 'testResult.length');
assert.sameValue(called, 2, 'called');
assert.sameValue(typeof testResult[2], "undefined", 'typeof testResult[2]');