New expectation functions plus convert old tests to use these.

tests/isolate/v2_spawn_function_negative_test.dart

Index: tests/isolate/v2_spawn_function_negative_test.dart
===================================================================
--- tests/isolate/v2_spawn_function_negative_test.dart	(revision 8345)
+++ tests/isolate/v2_spawn_function_negative_test.dart	(working copy)
@@ -16,7 +16,7 @@
     ReceivePort port = new ReceivePort();
     port.receive(expectAsync2((msg, _) {
       port.close();
-      expect(msg).equals('re: hello'); // should be hi, not hello
+      expect(msg, equals('re: hello')); // should be hi, not hello
     }));
 
     SendPort s = spawnFunction(child);