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