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368 lines
11 KiB
JavaScript
368 lines
11 KiB
JavaScript
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is JavaScript Engine testing utilities.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corp.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* pschwartau@netscape.com
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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*
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* Date: 18 Feb 2002
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* SUMMARY: Testing re.exec(str) when re.lastIndex is < 0 or > str.length
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*
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* Case 1: If re has the global flag set, then re(str) should be null
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* Case 2: If re doesn't have this set, then re(str) should be unaffected
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*
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* See http://bugzilla.mozilla.org/show_bug.cgi?id=76717
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*
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*
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* From the ECMA-262 Final spec:
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*
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* 15.10.6.2 RegExp.prototype.exec(string)
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* Performs a regular expression match of string against the regular
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* expression and returns an Array object containing the results of
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* the match, or null if the string did not match.
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*
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* The string ToString(string) is searched for an occurrence of the
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* regular expression pattern as follows:
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*
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* 1. Let S be the value of ToString(string).
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* 2. Let length be the length of S.
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* 3. Let lastIndex be the value of the lastIndex property.
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* 4. Let i be the value of ToInteger(lastIndex).
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* 5. If the global property is false, let i = 0.
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* 6. If i < 0 or i > length then set lastIndex to 0 and return null.
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* 7. Call [[Match]], giving it the arguments S and i.
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* If [[Match]] returned failure, go to step 8;
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* otherwise let r be its State result and go to step 10.
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* 8. Let i = i+1.
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* 9. Go to step 6.
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* 10. Let e be r's endIndex value.
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* 11. If the global property is true, set lastIndex to e.
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*
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* etc.
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*
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*
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* So:
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*
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* A. If the global flag is not set, |lastIndex| is set to 0
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* before the match is attempted; thus the match is unaffected.
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*
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* B. If the global flag IS set and re.lastIndex is >= 0 and <= str.length,
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* |lastIndex| is incremented every time there is a match; not from
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* i to i+1, but from i to "endIndex" e:
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*
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* e = (index of last input character matched so far by the pattern) + 1
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*
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* The match is then attempted from this position in the string (Step 7).
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*
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* C. When the global flag IS set and re.lastIndex is < 0 or > str.length,
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* |lastIndex| is set to 0 and the match returns null.
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*
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*
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* Note the |lastIndex| property is writeable, and may be set arbitrarily
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* by the programmer - and we will do that below.
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*
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*/
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//-----------------------------------------------------------------------------
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var gTestfile = '15.10.6.2-2.js';
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var i = 0;
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var BUGNUMBER = 76717;
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var summary = 'Testing re.exec(str) when re.lastIndex is < 0 or > str.length';
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var status = '';
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var statusmessages = new Array();
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var pattern = '';
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var patterns = new Array();
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var string = '';
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var strings = new Array();
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var actualmatch = '';
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var actualmatches = new Array();
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var expectedmatch = '';
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var expectedmatches = new Array();
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/******************************************************************************
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*
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* Case 1 : when the global flag is set -
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*
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*****************************************************************************/
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pattern = /abc/gi;
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string = 'AbcaBcabC';
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status = inSection(1);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc');
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addThis();
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status = inSection(2);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('aBc');
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addThis();
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status = inSection(3);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('abC');
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addThis();
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/*
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* At this point |lastIndex| is > string.length, so the match should be null -
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*/
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status = inSection(4);
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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/*
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* Now let's set |lastIndex| to -1, so the match should again be null -
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*/
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status = inSection(5);
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pattern.lastIndex = -1;
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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/*
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* Now try some edge-case values. Thanks to the work done in
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* http://bugzilla.mozilla.org/show_bug.cgi?id=124339, |lastIndex|
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* is now stored as a double instead of a uint32 (unsigned integer).
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*
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* Note 2^32 -1 is the upper bound for uint32's, but doubles can go
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* all the way up to Number.MAX_VALUE. So that's why we need cases
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* between those two numbers.
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*/
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status = inSection(6);
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pattern.lastIndex = Math.pow(2,32);
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(7);
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pattern.lastIndex = -Math.pow(2,32);
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(8);
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pattern.lastIndex = Math.pow(2,32) + 1;
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(9);
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pattern.lastIndex = -(Math.pow(2,32) + 1);
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(10);
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pattern.lastIndex = Math.pow(2,32) * 2;
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(11);
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pattern.lastIndex = -Math.pow(2,32) * 2;
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(12);
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pattern.lastIndex = Math.pow(2,40);
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(13);
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pattern.lastIndex = -Math.pow(2,40);
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(14);
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pattern.lastIndex = Number.MAX_VALUE;
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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status = inSection(15);
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pattern.lastIndex = -Number.MAX_VALUE;
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actualmatch = pattern.exec(string);
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expectedmatch = null;
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addThis();
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/******************************************************************************
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*
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* Case 2: repeat all the above cases WITHOUT the global flag set.
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* According to EMCA. |lastIndex| should get set to 0 before the match.
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*
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* Therefore re.exec(str) should be unaffected; thus our expected values
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* below are now DIFFERENT when |lastIndex| is < 0 or > str.length
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*
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*****************************************************************************/
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pattern = /abc/i;
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string = 'AbcaBcabC';
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status = inSection(16);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc');
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addThis();
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status = inSection(17);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc'); // NOT Array('aBc') as before -
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addThis();
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status = inSection(18);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc'); // NOT Array('abC') as before -
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addThis();
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/*
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* At this point above, |lastIndex| WAS > string.length, but not here -
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*/
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status = inSection(19);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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/*
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* Now let's set |lastIndex| to -1
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*/
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status = inSection(20);
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pattern.lastIndex = -1;
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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/*
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* Now try some edge-case values. Thanks to the work done in
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* http://bugzilla.mozilla.org/show_bug.cgi?id=124339, |lastIndex|
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* is now stored as a double instead of a uint32 (unsigned integer).
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*
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* Note 2^32 -1 is the upper bound for uint32's, but doubles can go
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* all the way up to Number.MAX_VALUE. So that's why we need cases
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* between those two numbers.
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*/
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status = inSection(21);
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pattern.lastIndex = Math.pow(2,32);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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status = inSection(22);
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pattern.lastIndex = -Math.pow(2,32);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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status = inSection(23);
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pattern.lastIndex = Math.pow(2,32) + 1;
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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status = inSection(24);
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pattern.lastIndex = -(Math.pow(2,32) + 1);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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status = inSection(25);
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pattern.lastIndex = Math.pow(2,32) * 2;
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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status = inSection(26);
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pattern.lastIndex = -Math.pow(2,32) * 2;
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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status = inSection(27);
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pattern.lastIndex = Math.pow(2,40);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -;
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addThis();
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status = inSection(28);
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pattern.lastIndex = -Math.pow(2,40);
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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status = inSection(29);
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pattern.lastIndex = Number.MAX_VALUE;
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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status = inSection(30);
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pattern.lastIndex = -Number.MAX_VALUE;
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actualmatch = pattern.exec(string);
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expectedmatch = Array('Abc') // NOT null as before -
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addThis();
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//-------------------------------------------------------------------------------------------------
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test();
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//-------------------------------------------------------------------------------------------------
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function addThis()
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{
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statusmessages[i] = status;
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patterns[i] = pattern;
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strings[i] = string;
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actualmatches[i] = actualmatch;
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expectedmatches[i] = expectedmatch;
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i++;
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}
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function test()
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{
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enterFunc ('test');
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printBugNumber(BUGNUMBER);
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printStatus (summary);
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testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);
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exitFunc ('test');
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}
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