gecko/js/tests/js1_5/extensions/regress-178722.js

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JavaScript
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/* -*- 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
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* pschwartau@netscape.com
*
* 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 ***** */
/*
*
* Date: 06 November 2002
* SUMMARY: arr.sort() should not output |undefined| when |arr| is empty
* See http://bugzilla.mozilla.org/show_bug.cgi?id=178722
*
* ECMA-262 Ed.3: 15.4.4.11 Array.prototype.sort (comparefn)
*
* 1. Call the [[Get]] method of this object with argument "length".
* 2. Call ToUint32(Result(1)).
* 3. Perform an implementation-dependent sequence of calls to the [[Get]],
* [[Put]], and [[Delete]] methods of this object, etc. etc.
* 4. Return this object.
*
*
* Note that sort() is done in-place on |arr|. In other words, sort() is a
* "destructive" method rather than a "functional" method. The return value
* of |arr.sort()| and |arr| are the same object.
*
* If |arr| is an empty array, the return value of |arr.sort()| should be
* an empty array, not the value |undefined| as was occurring in bug 178722.
*
*/
//-----------------------------------------------------------------------------
var gTestfile = 'regress-178722.js';
var UBound = 0;
var BUGNUMBER = 178722;
var summary = 'arr.sort() should not output |undefined| when |arr| is empty';
var status = '';
var statusitems = [];
var actual = '';
var actualvalues = [];
var expect= '';
var expectedvalues = [];
var arr;
// create empty array or pseudo-array objects in various ways
function f () {return arguments};
var arr5 = f();
arr5.__proto__ = Array.prototype;
status = inSection(5);
arr = arr5.sort();
actual = arr instanceof Array && arr.length === 0 && arr === arr5;
expect = true;
addThis();
// now do the same thing, with non-default sorting:
function g() {return 1;}
status = inSection('5a');
arr = arr5.sort(g);
actual = arr instanceof Array && arr.length === 0 && arr === arr5;
expect = true;
addThis();
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
function addThis()
{
statusitems[UBound] = status;
actualvalues[UBound] = actual;
expectedvalues[UBound] = expect;
UBound++;
}
function test()
{
enterFunc('test');
printBugNumber(BUGNUMBER);
printStatus(summary);
for (var i=0; i<UBound; i++)
{
reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
}
exitFunc ('test');
}