js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-4.js


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// 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 doesn't visit deleted elements when
    Array.length is decreased
---*/

function callbackfn(prevVal, curVal, idx, obj)
{
  arr.length = 2;
  return prevVal + curVal;
}

var arr = [1, 2, 3, 4, 5];

assert.sameValue(arr.reduce(callbackfn), 3, 'arr.reduce(callbackfn)');

reportCompare(0, 0);