JSTests/test262/test/built-ins/Array/prototype/filter/15.4.4.20-9-4.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.filter
es5id: 15.4.4.20-9-4
description: >
    Array.prototype.filter doesn't visit deleted elements when
    Array.length is decreased
---*/

function callbackfn(val, idx, obj)
{
  srcArr.length = 2;
  return true;
}

var srcArr = [1, 2, 3, 4, 6];
var resArr = srcArr.filter(callbackfn);

assert.sameValue(resArr.length, 2, 'resArr.length');