// Copyright (c) 2011, 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 Returns the index in the string where the match starts.
/// @description Checks that method returns correct value.
/// @author rodionov

import "../../../Utils/expect.dart";

void check(String str, String pattern, int start) {
  RegExp re = new RegExp(pattern, multiLine: false, caseSensitive: true);
  Match? m = re.firstMatch(str);
  Expect.equals(start, m?.start);
}

main(){
  check("", "", 0);
  check("", ".*", 0);
  check("a", "a", 0);
  check("abcdef", "[a-z]", 0);
  check("abcdef", "[a-z]+", 0);
  check("abcdef", "[b-z]+", 1);
  check("abcdef", "[a-e]+", 0);
}