JSTests/test262/test/built-ins/Array/prototype/filter/15.4.4.20-9-9.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: 15.4.4.20-9-9
description: >
    Array.prototype.filter - modifications to length don't change
    number of iterations
---*/

var called = 0;

function callbackfn(val, idx, obj) {
  called++;
  return true;
}

var obj = {
  1: 12,
  2: 9,
  length: 2
};

Object.defineProperty(obj, "0", {
  get: function() {
    obj.length = 3;
    return 11;
  },
  configurable: true
});

var newArr = Array.prototype.filter.call(obj, callbackfn);

assert.sameValue(newArr.length, 2, 'newArr.length');
assert.sameValue(called, 2, 'called');