Roll Observatory deps (charted -> ^0.3.0)

packages/observe/test/observable_list_test.dart

 // Copyright (c) 2013, 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.
 
 import 'dart:async';
 import 'package:observe/observe.dart';
 import 'package:unittest/unittest.dart';
 import 'observe_test_utils.dart';
 
 main() => dirtyCheckZone().run(_runTests);
@@ skipping 251 matching lines @@
 
       return new Future(() {
         expectChanges(propRecords, null);
         expectChanges(listRecords, [
           _change(1, addedCount: 1),
           _change(4, removed: [1])
         ]);
       });
     });
 
+    test('sort of 2 elements', () {
+      var list = toObservable([3, 1]);
+      // Dummy listener to record changes.
+      // TODO(jmesserly): should we just record changes always, to support the sync api?
+      sub = list.listChanges.listen((records) => null);
+      list.sort();
+      expect(list.deliverListChanges(), true);
+      list.sort();
+      expect(list.deliverListChanges(), false);
+      list.sort();
+      expect(list.deliverListChanges(), false);
+    });
+    
     test('clear', () {
       list.clear();
       expect(list, []);
 
       return new Future(() {
         expectChanges(propRecords, [
             _lengthChange(6, 0),
             new PropertyChangeRecord(list, #isEmpty, false, true),
             new PropertyChangeRecord(list, #isNotEmpty, true, false),
         ]);
         expectChanges(listRecords, [_change(0, removed: [1, 2, 3, 1, 3, 4])]);
       });
     });
   });
 }
 
 ObservableList list;
 
 _lengthChange(int oldValue, int newValue) =>
     new PropertyChangeRecord(list, #length, oldValue, newValue);
 
 _change(index, {removed: const [], addedCount: 0}) => new ListChangeRecord(
     list, index, removed: removed, addedCount: addedCount);
+