regress-178722.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/. */

/*

 * 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 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()

  printBugNumber(BUGNUMBER);

  printStatus(summary);

  for (var i=0; i<UBound; i++)

    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);