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

test/runner/isolate_listener_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.
 
 @TestOn("vm")
 
 import 'dart:async';
 import 'dart:isolate';
 
 import 'package:unittest/src/backend/invoker.dart';
 import 'package:unittest/src/backend/live_test.dart';
+import 'package:unittest/src/backend/metadata.dart';
 import 'package:unittest/src/backend/state.dart';
 import 'package:unittest/src/backend/suite.dart';
 import 'package:unittest/src/runner/vm/isolate_listener.dart';
 import 'package:unittest/src/runner/vm/isolate_test.dart';
 import 'package:unittest/src/util/io.dart';
 import 'package:unittest/src/util/remote_exception.dart';
 import 'package:unittest/unittest.dart';
 
 import '../utils.dart';
 
@@ skipping 244 matching lines @@
 /// Loads the first test defined in [entryPoint] in another isolate.
 ///
 /// This test will be automatically closed when the test is finished.
 Future<LiveTest> _isolateTest(void entryPoint(SendPort sendPort)) {
   return _spawnIsolate(entryPoint).then((receivePort) {
     return receivePort.first;
   }).then((response) {
     expect(response, containsPair("type", "success"));
 
     var testMap = response["tests"].first;
-    var test = new IsolateTest(testMap["name"], testMap["sendPort"]);
+    var metadata = new Metadata.deserialize(testMap["metadata"]);
+    var test = new IsolateTest(testMap["name"], metadata, testMap["sendPort"]);
     var suite = new Suite([test]);
     _liveTest = test.load(suite);
     return _liveTest;
   });
 }
 
 /// Spawns an isolate from [entryPoint], sends it a new [SendPort], and returns
 /// the corresponding [ReceivePort].
 ///
 /// This isolate will be automatically killed when the test is finished.
@@ skipping 84 matching lines @@
   IsolateListener.start(sendPort, () => () {
     test("multiple errors", () {
       Invoker.current.addOutstandingCallback();
       new Future(() => throw "one");
       new Future(() => throw "two");
       new Future(() => throw "three");
       new Future(() => throw "four");
     });
   });
 }