New expectation functions plus convert old tests to use these.

tests/isolate/v2_spawn_function_custom_class_test.dart

 // Copyright (c) 2012, 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.
 
 // Create a user-defined class in a new isolate.
 //
 // Regression test for vm bug 2235: We were forgetting to finalize
 // classes in new isolates started using the v2 api.
 
 #library('spawn_tests');
@@ skipping 11 matching lines @@
   port.receive((msg, reply) {
       reply.send('re: ${new MyClass().myFunc(msg)}');
     });
 }
 
 main() {
   test('message - reply chain', () {
     ReceivePort port = new ReceivePort();
     port.receive(expectAsync(msg, _) {
       port.close();
-      expect(msg).equals('re: hi there');
+      expect(msg, equals('re: hi there'));
     });
 
     SendPort s = spawnFunction(child);
     s.send('hi', port.toSendPort());
   });
 }