michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  *
michael@0:  * Date:    06 November 2002
michael@0:  * SUMMARY: arr.sort() should not output |undefined| when |arr| is empty
michael@0:  * See http://bugzilla.mozilla.org/show_bug.cgi?id=178722
michael@0:  *
michael@0:  * ECMA-262 Ed.3: 15.4.4.11 Array.prototype.sort (comparefn)
michael@0:  *
michael@0:  * 1. Call the [[Get]] method of this object with argument "length".
michael@0:  * 2. Call ToUint32(Result(1)).
michael@0:  * 3. Perform an implementation-dependent sequence of calls to the [[Get]],
michael@0:  *    [[Put]], and [[Delete]] methods of this object, etc. etc.
michael@0:  * 4. Return this object.
michael@0:  *
michael@0:  *
michael@0:  * Note that sort() is done in-place on |arr|. In other words, sort() is a
michael@0:  * "destructive" method rather than a "functional" method. The return value
michael@0:  * of |arr.sort()| and |arr| are the same object.
michael@0:  *
michael@0:  * If |arr| is an empty array, the return value of |arr.sort()| should be
michael@0:  * an empty array, not the value |undefined| as was occurring in bug 178722.
michael@0:  *
michael@0:  */
michael@0: //-----------------------------------------------------------------------------
michael@0: var UBound = 0;
michael@0: var BUGNUMBER = 178722;
michael@0: var summary = 'arr.sort() should not output |undefined| when |arr| is empty';
michael@0: var status = '';
michael@0: var statusitems = [];
michael@0: var actual = '';
michael@0: var actualvalues = [];
michael@0: var expect= '';
michael@0: var expectedvalues = [];
michael@0: var arr;
michael@0: 
michael@0: 
michael@0: // create empty array or pseudo-array objects in various ways
michael@0: function f () {return arguments};
michael@0: var arr5 = f();
michael@0: arr5.__proto__ = Array.prototype;
michael@0: 
michael@0: 
michael@0: status = inSection(5);
michael@0: arr = arr5.sort();
michael@0: actual = arr instanceof Array && arr.length === 0 && arr === arr5;
michael@0: expect = true;
michael@0: addThis();
michael@0: 
michael@0: 
michael@0: // now do the same thing, with non-default sorting:
michael@0: function g() {return 1;}
michael@0: 
michael@0: status = inSection('5a');
michael@0: arr = arr5.sort(g);
michael@0: actual = arr instanceof Array && arr.length === 0 && arr === arr5;
michael@0: expect = true;
michael@0: addThis();
michael@0: 
michael@0: 
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: test();
michael@0: //-----------------------------------------------------------------------------
michael@0: 
michael@0: 
michael@0: 
michael@0: function addThis()
michael@0: {
michael@0:   statusitems[UBound] = status;
michael@0:   actualvalues[UBound] = actual;
michael@0:   expectedvalues[UBound] = expect;
michael@0:   UBound++;
michael@0: }
michael@0: 
michael@0: 
michael@0: function test()
michael@0: {
michael@0:   enterFunc('test');
michael@0:   printBugNumber(BUGNUMBER);
michael@0:   printStatus(summary);
michael@0: 
michael@0:   for (var i=0; i<UBound; i++)
michael@0:   {
michael@0:     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
michael@0:   }
michael@0: 
michael@0:   exitFunc ('test');
michael@0: }