LibTest/async/Completer/completeError_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.
 */
/**
 * @assertion void completeError(Object exception, [Object stackTrace])
 * If error is null, it is replaced by a NullThrownError.
 * @description Checks that NullThrownError is thrown if exception is null.
 * @author ilya
 */

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

main() {
  var completer = new Completer();

  completer.future.then(
      (_) => Expect.fail('should not complete with a value'),
      onError: (e) {
        Expect.isTrue(e is NullThrownError);
      }
    );

  completer.completeError(null);
}