Status updates, and minor fixes to tests of async-await.

tests/language/asyncstar_yieldstar_test.dart

 // Copyright (c) 2015, 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 "dart:async";
 import "package:expect/expect.dart";
 import "package:async_helper/async_helper.dart";
 
 Stream<int> subStream(p) async* {
   yield p;
@@ skipping 13 matching lines @@
     Expect.isTrue(i < 10);
     // Canceling the stream-subscription should run the finalizer.
     finalized.complete(true);
   }
 }
 
 foo2(Stream subStream) async* {
   yield* subStream;
 }
 
-main () async {
-  asyncStart();
-  print("starting");
+test() async {
   Expect.listEquals([0, 1],
       await (subStream(0).toList()));
   Completer<bool> finalized = new Completer<bool>();
   Expect.listEquals(["outer", 0, 1, "outer", 1, 2, "outer", 2],
       await (foo(finalized).take(8).toList()));
   Expect.isTrue(await (finalized.future));
   
   finalized = new Completer<bool>();
   // Canceling the stream while it is yield*-ing from the sub-stream.
   Expect.listEquals(["outer", 0, 1, "outer", 1, 2, "outer"],
@@ skipping 38 matching lines @@
     }
     if (event == 5) {
       subscription.cancel();
     }
   });
   // Test that the yield*'ed streamSubscription is paused, resumed and canceled
   // by the async* stream.
   Expect.isTrue(await pausedCompleter.future);
   Expect.isTrue(await resumedCompleter.future);
   Expect.isTrue(await canceledCompleter.future);
-  
-  asyncEnd();
+}
+
+main() {
+  asyncStart();
+  test().then((_) {
+    asyncEnd();
+  });
 }