LibTest/async/Completer/completeError_A01_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 void completeError(Object exception, [Object stackTrace])
/// Complete future with an error. Completing a future with an error indicates
/// that an exception was thrown while trying to produce a value.
/// If error is a Future, the future itself is used as the error value.
/// @description Checks that after [completeError] is called, the corresponding
/// future is completed with that exception.
/// @author kaigorodov

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

List<Future<dynamic>> futures = [];
int count = 0;

check(value) {
  var completer = new Completer();
  var future = completer.future;

  completer.completeError(value);

  asyncStart();
  futures.add(future.then((fValue) => Expect.fail('should not get here'),
      onError: (Object asyncError) {
    Expect.equals(value, asyncError);
    count++;
    asyncEnd();
  }));
}

main() {
  asyncStart();
  check(0);
  check(-5);
  check('string');
  check(true);
  check(const {'k1': 1, 'k2': 2});
  Future.wait(futures).whenComplete(() {
    Expect.equals(5, count);
    asyncEnd();
  });
}