| // 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. Test not null |
| * start argument |
| * @author sgrekhov@unipro.ru |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| check(r"\d+", "adasfjkasfjkhasfj", 2); |
| check(r"^m", "mpairs\nmakes\tdouble", 1); |
| check(r"s$", "spairs\nmakes\tdouble", 1); |
| check(r"^p[b-z]", "1pairs\nmakes\tdouble\npesos", 1); |
| check(r"^..^e", "eeab\ncde", 2); |
| check(r"\bot", "botpilot\nsoviet robot\topenoffice", 3); |
| } |
| |
| void check(String pattern, String str, int start) { |
| RegExp re = new RegExp(pattern); |
| Expect.isNull(re.matchAsPrefix(str, start)); |
| } |
