Revert "unittest step 3 and 4: remove TestFramework.dart, make test.dart use"

tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart

Index: tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart
diff --git a/tests/isolate/src/APIv2_spawnFunctionNegativeTest.dart b/tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart
similarity index 72%
copy from tests/isolate/src/APIv2_spawnFunctionNegativeTest.dart
copy to tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart
index f6dce79bada8cb422aa6e4cebb98a823eb14dfac..e5c7bd6f07ab35644d9ee65298a2183046536eba 100644
--- a/tests/isolate/src/APIv2_spawnFunctionNegativeTest.dart
+++ b/tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart
@@ -4,20 +4,24 @@
 
 // Negative test to make sure that we are reaching all assertions.
 #library('spawn_tests');
-#import('dart:isolate');
 #import('../../../lib/unittest/unittest.dart');
+#import('../../../lib/unittest/dom_config.dart');
+#import('dart:dom'); // import added so test.dart can treat this as a webtest.
+#import('dart:isolate');
 
 child() {
   port.receive((msg, reply) => reply.send('re: $msg'));
 }
 
 main() {
-  test('message - reply chain', () {
+  useDomConfiguration();
+  asyncTest('message - reply chain', 1, () {
     ReceivePort port = new ReceivePort();
-    port.receive(expectAsync2((msg, _) {
-      port.close();
+    port.receive((msg, _) {
       expect(msg).equals('re: hello'); // should be hi, not hello
-    }));
+      port.close();
+      callbackDone();
+    });
 
     SendPort s = spawnFunction(child);
     s.send('hi', port.toSendPort());