JSTests/test262/test/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-5.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
description: >
    Array.prototype.filter - values of 'to' are passed in acending
    numeric order
---*/

var arr = [0, 1, 2, 3, 4];
var lastToIdx = 0;
var called = 0;

function callbackfn(val, idx, obj) {
  called++;
  if (lastToIdx !== idx) {
    return false;
  } else {
    lastToIdx++;
    return true;
  }
}
var newArr = arr.filter(callbackfn);

assert.sameValue(newArr.length, 5, 'newArr.length');
assert.sameValue(called, 5, 'called');