|  | // Copyright (c) 2014, 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. | 
|  |  | 
|  | // VMOptions=--optimization-counter-threshold=5 | 
|  |  | 
|  | import 'package:expect/expect.dart'; | 
|  | import 'package:async_helper/async_helper.dart'; | 
|  |  | 
|  | var X = 0; | 
|  |  | 
|  | foo() async { | 
|  | Expect.equals(X, 0); | 
|  | await 5; | 
|  | Expect.equals(X, 10); | 
|  | return await 499; | 
|  | } | 
|  |  | 
|  | main() { | 
|  | asyncStart(); | 
|  | var f = foo(); | 
|  | f.then((res) { | 
|  | Expect.equals(499, res); | 
|  | asyncEnd(); | 
|  | }); | 
|  | X = 10; | 
|  | } |