def setup(self, mock_exists): mock_exists.return_value = True self.context_manager_mock = mock.MagicMock() self.file_mock = mock.MagicMock() self.enter_mock = mock.MagicMock() self.exit_mock = mock.MagicMock() self.enter_mock.return_value = self.file_mock setattr(self.context_manager_mock, '__enter__', self.enter_mock) setattr(self.context_manager_mock, '__exit__', self.exit_mock) self.container = ContainerSetupDocker('root_dir', {'container_name': 'system'}) self.container.create_fstab = mock.Mock() self.container.deactivate_bootloader_setup = mock.Mock() self.container.deactivate_root_filesystem_check = mock.Mock() self.container.setup_static_device_nodes = mock.Mock() self.container.setup_root_console = mock.Mock() self.container.deactivate_systemd_service = mock.Mock()