Clean up observable tests to new API.

client/tests/client/observable/EventBatchTests.dart

Index: client/tests/client/observable/EventBatchTests.dart
diff --git a/client/tests/client/observable/EventBatchTests.dart b/client/tests/client/observable/EventBatchTests.dart
index 515f72cc71f7c18556ab0fe0e8bb285facd5bf94..23b0f9f7e9a7ac2bb1a128dfab8ac6e23f7a162b 100644
--- a/client/tests/client/observable/EventBatchTests.dart
+++ b/client/tests/client/observable/EventBatchTests.dart
@@ -2,15 +2,8 @@
 // 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.
 
-class EventBatchTests extends ObservableTestSetBase {
-  // TODO(rnystrom): Remove this when default constructors are supported.
-  EventBatchTests() : super();
-
-  setup() {
-    addTest(testEventBatch);
-  }
-
-  void testEventBatch() {
+testEventBatch() {
+  test('EventBatch', () {
     // check that all events are fired at the end. Use all record methods
     // in abstract observable
     final target = new AbstractObservable();
@@ -35,22 +28,11 @@ class EventBatchTests extends ObservableTestSetBase {
     expect(res).isNotNull();
 
     expect(res.events.length).equals(6);
-    checkEvent(res.events[0],
-        target, 'pM', null, ChangeEvent.UPDATE, 10, 11);
-
-    checkEvent(res.events[1],
-        target, 'pL', null, ChangeEvent.UPDATE, '11', '13');
-
-    checkEvent(res.events[2],
-        target, null, 2, ChangeEvent.UPDATE, 'a', 'b');
-
-    checkEvent(res.events[3],
-        target, null, 5, ChangeEvent.INSERT, 'a', null);
-
-    checkEvent(res.events[4],
-        target, null, 4, ChangeEvent.REMOVE, null, 'c');
-
-    checkEvent(res.events[5],
-        target, null, null, ChangeEvent.GLOBAL, null, null);
-  }
+    validateUpdate(res.events[0], target, 'pM', null, 10, 11);
+    validateUpdate(res.events[1], target, 'pL', null, '11', '13');
+    validateUpdate(res.events[2], target, null, 2, 'a', 'b');
+    validateInsert(res.events[3], target, null, 5, 'a');
+    validateRemove(res.events[4], target, null, 4, 'c');
+    validateGlobal(res.events[5], target);
+  });
 }