LibTest/async/Future/catchError_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 Future catchError(Function onError, {bool test(Object error)})
/// The test function should not throw, but if it does, it is handled as if
/// the onError function had thrown.
/// @description Checks that if [test] function throws an error, then returned
/// future is completed with this error.
/// @author a.semenov@unipro.ru

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

main() {
  asyncStart();
  new Future.error("!")
    .catchError(
      (Object error) {
        Expect.fail("The onError should not be executed, if test throws");
      },
      test:(Object error){
        Expect.equals("!", error);
        throw "@";
      }
    )
    .then(
      (var value) {
        Expect.fail("returned future should complete with error");
      },
      onError: (Object error){
        Expect.equals("@", error);
        asyncEnd();
      }
    );
}