gecko/js/tests/js1_7/regress/regress-363040-02.js

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is JavaScript Engine testing utilities.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): Jeff Walden
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

var gTestfile = 'regress-363040-02.js';
//-----------------------------------------------------------------------------
var BUGNUMBER = 363040;
var summary = 'Array.prototype.reduce application in array flattening';
var actual = '';
var expect = '';


//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------

function test()
{
  enterFunc ('test');
  printBugNumber(BUGNUMBER);
  printStatus (summary);
 
  function flatten(arr)
  {
    function op(partial, item)
    {
      if (item instanceof Array)
        Array.prototype.push.apply(partial, flatten(item));
      else
        partial.push(item);

      return partial;
    }

    return arr.reduce(op, []);
  }

  expect = [1, 2, 3];
  actual = flatten([1, 2, 3]);      // [1, 2, 3]
  reportCompare(expect + '', actual + '', summary + ': ' + expect);

  expect = [1, 2, 3];
  actual = flatten([1, [2], 3]);    // [1, 2, 3]
  reportCompare(expect + '', actual + '', summary + ': ' + expect);

  expect = [2, 3];
  actual = flatten([[], 2, 3]);     // [2, 3]
  reportCompare(expect + '', actual + '', summary + ': ' + expect);

  expect = [1, 2, 3];
  actual = flatten([[1], 2, 3]);    // [1, 2, 3]
  reportCompare(expect + '', actual + '', summary + ': ' + expect);

  expect = [4];
  actual = flatten([[[[4]]]]);      // [4]
  reportCompare(expect + '', actual + '', summary + ': ' + expect);

  expect = [1, 2, 3];
  actual = flatten([1, [2, [3]]]);  // [1, 2, 3]
  reportCompare(expect + '', actual + '', summary + ': ' + expect);

  expect = [];
  actual = flatten([[[[[]]]]]);     // []
  reportCompare(expect + '', actual + '', summary + ': ' + expect);

  exitFunc ('test');
}