| // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /** |
| * @assertion 15.10.2.8: Parentheses of the form ( Disjunction ) serve both to |
| * group the components of the Disjunction pattern together and tov save the |
| * result of the match. The result can be used either in a backreference (\ |
| * followed by a nonzero decimal number), referenced in a replace String, or |
| * returned as part of a list from the regular expression matching internal |
| * procedure. |
| * @description Checks nested parentheses. |
| * @3rdparty sputnik-v1:S15.10.2.8_A3_T1.js-S15.10.2.8_A3_T33.js |
| * @author rodionov |
| */ |
| import "../../../../Utils/expect.dart"; |
| |
| |
| main() { |
| int parens = 200; |
| StringBuffer ptrn = new StringBuffer(); |
| for(int i = 0; i < parens; i++) { |
| ptrn.write("("); |
| } |
| ptrn.write("hello"); |
| for(int i = 0; i < parens; i++) { |
| ptrn.write(")"); |
| } |
| List<String> exp = List<String>.filled(parens + 1, "hello"); |
| check(ptrn.toString(), "hello", 0, exp); |
| } |
| |
| void check( |
| String pattern, String str, int matchPos, List<String> expectedGroups) { |
| RegExp re = new RegExp(pattern); |
| Expect.isNotNull(re.firstMatch(str), "\"$pattern\" !~ \"$str\""); |
| Match fm = re.firstMatch(str) as Match; |
| if(matchPos >= 0) { |
| Expect.equals(matchPos, fm.start); |
| } |
| if(null != expectedGroups) { |
| Expect.equals(expectedGroups.length, fm.groupCount + 1); |
| |
| for(int i = 0; i <= fm.groupCount; i++) { |
| String? expGr = expectedGroups[i]; |
| String? actGr = fm.group(i); |
| Expect.equals(expGr, actGr, |
| "Mismatch at group $i: \"$expGr\" expected instead of \"$actGr\""); |
| } |
| } |
| } |