| /* |
| * 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. |
| * |
| * If start is provided, it must be an integer in the range 0 .. string.length. |
| * In that case, this patten is tested against the string at the start position. |
| * That is, a Match is returned if the pattern can match a part of the string |
| * starting from position start. Returns null if the pattern doesn't match. |
| * @description Checks that the returned Match is correctly initialized. |
| * @author sgrekhov@unipro.ru |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| check("AE", "AEKFCD", [0, 2, "AE"]); |
| check("acd", "acdKFCD", [0, 3, "acd"]); |
| check("AB", "abcdefg", null); |
| check("AB", "ABcdefg", [0, 2, "AB"]); |
| check("\s", " ABcdefg", null); |
| check(":alpha:", "ABcdefg", null); |
| check(":alpha:", ":alphaABcdefg", null); |
| check(":alpha:", ":alpha:ABcdefg", [0, 7, ":alpha:"]); |
| } |
| |
| void check(String pattern, String str, List? groupData) { |
| Match? fm = pattern.matchAsPrefix(str); |
| if(fm == null && groupData != null) { |
| Expect.fail("Nothing found for pattern <$pattern> in string <$str>"); |
| } |
| if (groupData == null) { |
| Expect.isNull(fm); |
| return; |
| } |
| if (fm != null) { |
| Expect.equals(str, fm.input); |
| Expect.equals(pattern, fm.pattern); |
| Expect.equals(groupData.length, 3); |
| Expect.equals(groupData[0], fm.start); |
| Expect.equals(groupData[1], fm.end); |
| Expect.equals(groupData[2], fm.group(0)); |
| } else { |
| Expect.fail("Match is null"); |
| } |
| } |