| // 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 String replaceFirstMapped(Pattern from, |
| /// String replace(Match match), [int startIndex = 0]) |
| /// Replace the first occurence of from in this string. |
| /// |
| /// Returns a new string, which is this string except that the first match of |
| /// pattern, starting from startIndex, is replaced by the result of calling |
| /// replace with the match object. |
| /// @description Checks that this method replaces the first matched substring |
| /// only. Test that RegEx can be used as from pattern |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| Expect.equals("0231", "1231".replaceFirstMapped(new RegExp("1"), (m) => "0")); |
| Expect.equals("12031\w", "12\w31\w".replaceFirstMapped(new RegExp("\w"), |
| (m) => "0")); |
| Expect.equals(r"02\w31\w", r"12\w31\w".replaceFirstMapped(new RegExp(r"\w"), |
| (m) => "0")); |
| Expect.equals("abc-1231 5", "abc 1231 5".replaceFirstMapped(new RegExp("\\s"), |
| (m) => "-")); |
| } |