| // Copyright (c) 2016, 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 Match matchAsPrefix(String string, [int start = 0]) |
| /// Match this pattern against the start of string. |
| /// ... |
| /// Returns null if the pattern doesn't match. |
| /// @description Checks that null is returned when appropriate. |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| check(r"\d+", "asfjkasfjkhasfj"); |
| check(r"^m", "pairs\nmakes\tdouble"); |
| check(r"s$", "pairs\nmakes\tdouble"); |
| check(r"^p[b-z]", "pairs\nmakes\tdouble\npesos"); |
| check(r"^..^e", "ab\ncde"); |
| check(r"\bot", "pilot\nsoviet robot\topenoffice"); |
| } |
| |
| void check(String pattern, String str) { |
| RegExp re = new RegExp(pattern); |
| Expect.isNull(re.matchAsPrefix(str)); |
| } |
