def setUp(self): app = Pitivi() app._startupCb(app) app.project_manager.newBlankProject() self.timeline = app.project_manager.current_project.timeline self.layer = GES.Layer() self.timeline.add_layer(self.layer) self.action_log = UndoableActionLog() self.observer = TimelineLogObserverSpy(self.action_log) self.observer.startObserving(self.timeline)