test/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-18.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.4.4.21-9-c-i-18
description: >
    Array.prototype.reduce - element to be retrieved is own accessor
    property without a get function on an Array
---*/

        var testResult = false;
        var initialValue = 0;
        function callbackfn(prevVal, curVal, idx, obj) {
            if (idx === 1) {
                testResult = (curVal === undefined);
            }
        }

        var arr = [0, , 2];

        Object.defineProperty(arr, "1", {
            set: function () { },
            configurable: true
        });

        arr.reduce(callbackfn, initialValue);

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