| // Copyright (c) 2013, 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. | 
 |  | 
 | import 'package:async_helper/async_helper.dart'; | 
 | import "package:expect/expect.dart"; | 
 | import 'dart:async'; | 
 | import 'catch_errors.dart'; | 
 |  | 
 | main() { | 
 |   asyncStart(); | 
 |   Completer done = new Completer(); | 
 |  | 
 |   var events = []; | 
 |   // Test runZoned with periodic Timers. | 
 |   runZoned(() { | 
 |     int counter = 0; | 
 |     new Timer.periodic(const Duration(milliseconds: 50), (timer) { | 
 |       if (counter == 5) { | 
 |         timer.cancel(); | 
 |         done.complete(true); | 
 |       } | 
 |       counter++; | 
 |       events.add(counter); | 
 |     }); | 
 |   }); | 
 |  | 
 |   done.future.whenComplete(() { | 
 |     Expect.listEquals([ | 
 |       "main exit", | 
 |       1, | 
 |       2, | 
 |       3, | 
 |       4, | 
 |       5, | 
 |       6, | 
 |     ], events); | 
 |     asyncEnd(); | 
 |   }); | 
 |   events.add("main exit"); | 
 | } |