| // 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. |
| |
| // @dart = 2.9 |
| |
| /// @assertion Match matchAsPrefix(String string, [int start = 0]) |
| /// Match this pattern against the start of string. |
| /// ... |
| /// @description Checks that if str is null then exception is thrown |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| check("AE", 0); |
| check("(a|cd)+|ef", 1); |
| check(".+: gr(a|e)y", 1); |
| check("((a)|(ab))((c)|(bc))", 0); |
| check(r"^(a+)\1*,\1+$", 1); |
| check(r"^(a+?)\1*,\1+$", 0); |
| check("(z)((a+)?(b+)?(c))*", 0); |
| } |
| |
| void check(String pattern, int start) { |
| Expect.throws(() {pattern.matchAsPrefix(null, start);}); |
| } |
