LibTest/core/RegExp/Pattern_semantics/firstMatch_Assertion_A05_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.

/// @assertion Since the assertions ^, $, \b and \B do not change endIndex,
/// multiple subsequent occurrences of the same one are equivalent to a single
/// assertion.
/// @description Checks that the assertion is true.
/// @3rdparty sputnik-v1:S15.10.2.6_A5_T1.js-S15.10.2.6_A5_T2.js
/// @author rodionov

import "../../../../Utils/expect.dart";
 
main() {
  check(r"^^^^^^^\b\b\b\bro\B\B\B\Bbot\b\b\b\b\b$$$$", "robot", 0);
}

void check(String pattern, String str, int matchPos) {
  RegExp re = new RegExp(pattern);
  Match? fm = re.firstMatch(str);
  Expect.isNotNull(fm, "\"$pattern\" !~ \"$str\"");
  if(matchPos >= 0) {
    Expect.equals(matchPos, fm?.start);
  }
}