LibTest/async/Future/Future_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 Future(dynamic computation())
/// Creates a future containing the result of calling computation
/// asynchronously with Timer.run.
/// if the result of executing computation throws, the returned future is
/// completed with the error.
/// If the returned value is itself a Future, completion of the created
/// future will wait until the returned future completes, and will then
/// complete with the same result.
/// If a non-future value is returned, the returned future is completed with
/// that value.
/// @description Checks that if computation() throws, the created future
/// is completed with the same error.
/// @author ilya

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

main() {
  var value = [1, 2, 3];

  asyncStart();
  Future future = new Future(() => throw value);

  future
    .catchError((e) {
      Expect.identical(value, e);
      asyncEnd();
    });
}