Centralized event streams

runtime/observatory/lib/src/mocks/repositories/target.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 TargetChangeEventMock implements M.TargetChangeEvent {
-  final TargetRepositoryMock repository;
-  const TargetChangeEventMock({this.repository});
-}
-
-typedef void TargetRepositoryMockStringCallback(String notification);
-typedef void TargetRepositoryMockTargetCallback(M.Target notification);
-
-class TargetRepositoryMock implements M.TargetRepository {
-  final StreamController<M.TargetChangeEvent> _onChange =
-      new StreamController<M.TargetChangeEvent>.broadcast();
-  Stream<M.TargetChangeEvent> get onChange => _onChange.stream;
-
-  bool get hasListeners => _onChange.hasListener;
-
-  final M.Target _current;
-  final Iterable<M.Target> _list;
-  final TargetRepositoryMockStringCallback _add;
-  final TargetRepositoryMockTargetCallback _setCurrent;
-  final TargetRepositoryMockTargetCallback _delete;
-
-  bool currentInvoked = false;
-  bool addInvoked = false;
-  bool listInvoked = false;
-  bool setCurrentInvoked = false;
-  bool deleteInvoked = false;
-
-  M.Target get current {
-    currentInvoked = true;
-    return _current;
-  }
-
-  void add(String val) {
-    addInvoked = true;
-    if (_add != null) _add(val);
-  }
-
-  Iterable<M.Target> list() {
-    listInvoked = true;
-    return _list;
-  }
-
-  void setCurrent(M.Target target) {
-    setCurrentInvoked = true;
-    if (_setCurrent != null) _setCurrent(target);
-  }
-
-  void delete(M.Target target) {
-    deleteInvoked = true;
-    if (_delete != null) _delete(target);
-  }
-
-  void triggerChangeEvent() {
-    _onChange.add(new TargetChangeEventMock(repository: this));
-  }
-
-  TargetRepositoryMock({M.Target current, Iterable<M.Target> list : const [],
-      TargetRepositoryMockStringCallback add,
-      TargetRepositoryMockTargetCallback setCurrent,
-      TargetRepositoryMockTargetCallback delete})
-    : _current = current,
-      _list = list,
-      _add = add,
-      _setCurrent = setCurrent,
-      _delete = delete;
-}