| // 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 15.10.2.5: An Atom followed by a Quantifier is repeated the |
| * number of times specified by the Quantifier. A Quantifier can be non-greedy, |
| * in which case the Atom pattern is repeated as few times as possible while |
| * still matching the sequel, or it can be greedy, in which case the Atom |
| * pattern is repeated as many times as possible while still matching the |
| * sequel. The Atom pattern is repeated rather than the input String that it |
| * matches, so different repetitions of the Atom can match different input |
| * substrings. |
| * @description Checks that greedy and non-greedy quantifiers work as expected. |
| * @3rdparty sputnik-v1:S15.10.2.5_A1_T1.js-S15.10.2.5_A1_T2.js |
| * @author rodionov |
| */ |
| import "../../../../Utils/expect.dart"; |
| |
| |
| main() { |
| check("a[a-z]{2,4}", "abcdefghi", ["abcde"]); |
| check("a[a-z]{2,4}?", "abcdefghi", ["abc"]); |
| } |
| |
| void check(String pattern, String str, List<String> expectedGroups) { |
| RegExp re = new RegExp(pattern); |
| Expect.isNotNull(re.firstMatch(str)); |
| Match fm = re.firstMatch(str) as Match; |
| 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\""); |
| } |
| } |
| } |