test/built-ins/Array/prototype/reduceRight/15.4.4.22-9-6.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

// 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.reduceright
es5id: 15.4.4.22-9-6
description: >
    Array.prototype.reduceRight visits deleted element in array after
    the call when same index is also present in prototype
---*/

function callbackfn(prevVal, curVal, idx, obj)
{
  delete arr[1];
  delete arr[2];
  return prevVal + curVal;
}
Array.prototype[2] = 6;
var arr = ['1', 2, 3, 4, 5];
var res = arr.reduceRight(callbackfn);
delete Array.prototype[2];

//one element deleted
assert.sameValue(res, "151", 'res');