def mock_file_manager(envelope_peer_spooled, mock_file_path): file_manager = MagicMock(FileManager) file_manager.open_file = CoroutineMock() file_manager.open_file.return_value = envelope_peer_spooled file_manager.save_file = CoroutineMock() file_manager.save_file.return_value = mock_file_path file_manager._file_path = mock_file_path return file_manager