| /* -*- 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'); |
| } |