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();
    });
}