Add a testOn parameter to test() and group().

lib/src/runner/vm/isolate_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.
 
 library unittest.runner.vm.isolate_test;
 
 import 'dart:isolate';
 
 import '../../backend/live_test.dart';
 import '../../backend/live_test_controller.dart';
+import '../../backend/metadata.dart';
 import '../../backend/state.dart';
 import '../../backend/suite.dart';
 import '../../backend/test.dart';
 import '../../util/remote_exception.dart';
 
 /// A test in another isolate.
 class IsolateTest implements Test {
   final String name;
+  final Metadata metadata;
 
   /// The port on which to communicate with the remote test.
   final SendPort _sendPort;
 
-  IsolateTest(this.name, this._sendPort);
+  IsolateTest(this.name, this.metadata, this._sendPort);
 
   /// Loads a single runnable instance of this test.
   LiveTest load(Suite suite) {
     var receivePort;
     var controller;
     controller = new LiveTestController(suite, this, () {
       controller.setState(const State(Status.running, Result.success));
 
       receivePort = new ReceivePort();
       _sendPort.send({
@@ skipping 14 matching lines @@
           assert(message['type'] == 'complete');
           controller.completer.complete();
         }
       });
     }, onClose: () {
       if (receivePort != null) receivePort.close();
     });
     return controller.liveTest;
   }
 }