// 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 static void throws(
/// void f(), [_CheckExceptionFn check = null, String reason = ''])
/// Descriptive error message is provided in case of failure.
///
/// @description Checks that message of thrown [ExpectException] includes the
/// specified reason argument if any, both when the tested method doesn't throw
/// any exceptions and when the check function returns false.
///
/// @author varlax

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

typedef bool checkFn(exception);
typedef void test();

main() {
  check(() { return; }, null, "sdsds sd dsf1");
  check(() { return; }, (e) => true, "sdsds sd dsf2");
  check(() { return; }, (e) => false, "sdsds sd dsf3");

  check(() {throw "";}, (e) => false, "sdsds sd dsf4");
}


void check(test tFun, [checkFn? checkFun = null, String reason = '']) {
  try {
    Expect.throws(tFun, checkFun, reason);
    Expect.fail("ExpectException expected");
  } on ExpectException catch(e) {
    if (!(e.message as String).contains(reason as String, 0))
      throw "reason ($reason) not mentioned in ExpectException message "
          "(${e.message})";
  }
}