pkg/unittest: Run tests in zones

pkg/unittest/test/unittest_protect_async_test.dart

 // 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.
 
 library unittestTest;
 import 'dart:isolate';
 import 'dart:async';
 import 'package:unittest/unittest.dart';
 
 part 'unittest_test_utils.dart';
@@ skipping 19 matching lines @@
     });
     new Future(() => protected('arg1', 'arg2'));
   });
 
   test('throw away 1', () {
     return new Future(() {});
   });
 };
 
 var expected = '1:0:3:4:0:::null:'
-  'protectAsync0:Callback called (1) after test case protectAsync0 has already been marked as pass.:'
-  'protectAsync1:Callback called (1) after test case protectAsync1 has already been marked as pass.:'
-  'protectAsync2:Callback called (1) after test case protectAsync2 has already been marked as pass.:'
+  'protectAsync0:Caught Bad state: error during protectAsync0:'
+  'protectAsync1:Caught Bad state: error during protectAsync1: one arg:'
+  'protectAsync2:Caught Bad state: error during protectAsync2: arg1, arg2:'
   'throw away 1:';