LibTest/core/Match/group_A02_t01.dart

// 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.

// @dart = 2.9

/// @assertion Throws RangeError if [group] is out of bounds
/// @description Check that exception is thrown.
/// @author rodionov

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

void check(String str, String pattern, int index) {
  RegExp re = new RegExp(pattern, caseSensitive: true, multiLine: false);
  Match m = re.firstMatch(str);
  try {
    m.group(index);
    Expect.fail("RangeError is expected");
  } on RangeError catch(e) {} 
}
 
main() {
  check("a", "a", 1);
  check("a", "(a)", 2);
  check("abcdef", "(([a-z])*)", 3);
  check("abcdef", "(([a-z])*)", 65536);
  check("abcdef", "(([a-z])*)", -1);
  check("abcdef", "(([a-z])*)", -65536);
}