Reorganize tests for samples so the test is discoverable from the sample

samples/tests/samples/lib/observable/event_batch_tests.dart

Index: samples/tests/samples/lib/observable/event_batch_tests.dart
diff --git a/samples/tests/samples/lib/observable/event_batch_tests.dart b/samples/tests/samples/lib/observable/event_batch_tests.dart
deleted file mode 100644
index 0e7a7cc27225f843a24cb1c34ef5a290dbec56fd..0000000000000000000000000000000000000000
--- a/samples/tests/samples/lib/observable/event_batch_tests.dart
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright (c) 2011, 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.
-
-part of observable_tests;
-
-testEventBatch() {
-  test('EventBatch', () {
-    // check that all events are fired at the end. Use all record methods
-    // in abstract observable
-    final target = new AbstractObservable();
-    EventSummary res = null;
-    target.addChangeListener((summary) {
-      expect(res, isNull);
-      res = summary;
-      expect(res, isNotNull);
-    });
-
-    final f = EventBatch.wrap((e) {
-      target.recordPropertyUpdate('pM', 10, 11);
-      target.recordPropertyUpdate('pL', '11', '13');
-      target.recordListUpdate(2, 'a', 'b');
-      target.recordListInsert(5, 'a');
-      target.recordListRemove(4, 'c');
-      target.recordGlobalChange();
-    });
-
-    expect(res, isNull);
-    f(null);
-    expect(res, isNotNull);
-
-    expect(res.events, hasLength(6));
-    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);
-  });
-}