js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-16.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
29
30
31
32

// 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.reduce
description: >
    Array.prototype.reduce - element to be retrieved is inherited
    accessor property on an Array
---*/

var testResult = false;

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

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

var arr = [, 1, 2];

arr.reduce(callbackfn);

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

reportCompare(0, 0);