LibTest/async/Completer/completeError_A01_t02.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 a stackTrace can be passed to completeError.
/// @author ilya

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

main() {
  var completer = new Completer();
  var future = completer.future;
  var error = new Error();
  var stackTrace;

  asyncStart();
  try {
    throw error;
  } catch (e, st) {
    stackTrace = st;
    completer.completeError(e, st);
  }

  future.then((fValue) => Expect.fail('should not get here'), onError: (e, st) {
    Expect.identical(error, e);
    Expect.identical(stackTrace, st);
    asyncEnd();
  });
}