Centralized event streams

runtime/observatory/tests/observatory_ui/mocks/repositories/flag.dart

+// Copyright (c) 2016, 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 mocks;
+
+class FlagsRepositoryMock implements M.FlagsRepository {
+  final Iterable<M.Flag> _list;
+  bool isListInvoked = false;
+
+  Future<Iterable<M.Flag>> list() async {
+    isListInvoked = true;
+    return _list;
+  }
+
+  FlagsRepositoryMock({Iterable<M.Flag> list: const []})
+    : _list = new List.unmodifiable(list);
+}