filter.js - mozsearch

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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

//-----------------------------------------------------------------------------

var BUGNUMBER     = "364603";

var summary = "The value placed in a filtered array for an element is the " +

  " element's value before the callback is run, not after";

var actual, expect;

printBugNumber(BUGNUMBER);

printStatus(summary);

/**************

 * BEGIN TEST *

 **************/

var failed = false;

function mutate(val, index, arr)

  arr[index] = "mutated";

  return true;

function assertEqual(v1, v2, msg)

  if (v1 !== v2)

    throw msg;

try

  var a = [1, 2];

  var m = a.filter(mutate);

  assertEqual(a[0], "mutated", "Array a not mutated!");

  assertEqual(a[1], "mutated", "Array a not mutated!");

  assertEqual(m[0], 1, "Filtered value is value before callback is run");

  assertEqual(m[1], 2, "Filtered value is value before callback is run");

catch (e)

  failed = e;

expect = false;

actual = failed;

reportCompare(expect, actual, summary);