| // Copyright (c) 2017, 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) { |
| Expect.equals(null, pattern.matchAsPrefix(str)); |
| } |
