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:    19 June 2003
michael@0:  * SUMMARY: Testing regexp submatches with quantifiers
michael@0:  *
michael@0:  * See http://bugzilla.mozilla.org/show_bug.cgi?id=209919
michael@0:  *
michael@0:  */
michael@0: //-----------------------------------------------------------------------------
michael@0: var i = 0;
michael@0: var BUGNUMBER = 209919;
michael@0: var summary = 'Testing regexp submatches with quantifiers';
michael@0: var status = '';
michael@0: var statusmessages = new Array();
michael@0: var pattern = '';
michael@0: var patterns = new Array();
michael@0: var string = '';
michael@0: var strings = new Array();
michael@0: var actualmatch = '';
michael@0: var actualmatches = new Array();
michael@0: var expectedmatch = '';
michael@0: var expectedmatches = new Array();
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * Waldemar: "ECMA-262 15.10.2.5, third algorithm, step 2.1 states that
michael@0:  * once the minimum repeat count (which is 0 for *, 1 for +, etc.) has
michael@0:  * been satisfied, an atom being repeated must not match the empty string."
michael@0:  *
michael@0:  * In this example, the minimum repeat count is 0, so the last thing the
michael@0:  * capturing parens is permitted to contain is the 'a'. It may NOT go on
michael@0:  * to capture the '' at the $ position of 'a', even though '' satifies
michael@0:  * the condition b*
michael@0:  *
michael@0:  */
michael@0: status = inSection(1);
michael@0: string = 'a';
michael@0: pattern = /(a|b*)*/;
michael@0: actualmatch = string.match(pattern);
michael@0: expectedmatch = Array(string, 'a');
michael@0: addThis();
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * In this example, the minimum repeat count is 5, so the capturing parens
michael@0:  * captures the 'a', then goes on to capture the '' at the $ position of 'a'
michael@0:  * 4 times before it has to stop. Therefore the last thing it contains is ''.
michael@0:  */
michael@0: status = inSection(2);
michael@0: string = 'a';
michael@0: pattern = /(a|b*){5,}/;
michael@0: actualmatch = string.match(pattern);
michael@0: expectedmatch = Array(string, '');
michael@0: addThis();
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * Reduction of the above examples to contain only the condition b*
michael@0:  * inside the capturing parens. This can be even harder to grasp!
michael@0:  *
michael@0:  * The global match is the '' at the ^ position of 'a', but the parens
michael@0:  * is NOT permitted to capture it since the minimum repeat count is 0!
michael@0:  */
michael@0: status = inSection(3);
michael@0: string = 'a';
michael@0: pattern = /(b*)*/;
michael@0: actualmatch = string.match(pattern);
michael@0: expectedmatch = Array('', undefined);
michael@0: addThis();
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * Here we have used the + quantifier (repeat count 1) outside the parens.
michael@0:  * Therefore the parens must capture at least once before stopping, so it
michael@0:  * does capture the '' this time -
michael@0:  */
michael@0: status = inSection(4);
michael@0: string = 'a';
michael@0: pattern = /(b*)+/;
michael@0: actualmatch = string.match(pattern);
michael@0: expectedmatch = Array('', '');
michael@0: addThis();
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * More complex examples -
michael@0:  */
michael@0: pattern = /^\-?(\d{1,}|\.{0,})*(\,\d{1,})?$/;
michael@0: 
michael@0: status = inSection(5);
michael@0: string = '100.00';
michael@0: actualmatch = string.match(pattern);
michael@0: expectedmatch = Array(string, '00', undefined);
michael@0: addThis();
michael@0: 
michael@0: status = inSection(6);
michael@0: string = '100,00';
michael@0: actualmatch = string.match(pattern);
michael@0: expectedmatch = Array(string, '100', ',00');
michael@0: addThis();
michael@0: 
michael@0: status = inSection(7);
michael@0: string = '1.000,00';
michael@0: actualmatch = string.match(pattern);
michael@0: expectedmatch = Array(string, '000', ',00');
michael@0: addThis();
michael@0: 
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:   statusmessages[i] = status;
michael@0:   patterns[i] = pattern;
michael@0:   strings[i] = string;
michael@0:   actualmatches[i] = actualmatch;
michael@0:   expectedmatches[i] = expectedmatch;
michael@0:   i++;
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:   testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);
michael@0:   exitFunc ('test');
michael@0: }