from __future__ import absolute_import from __future__ import unicode_literals import mock from pre_commit.languages import docker from pre_commit.util import CalledProcessError def test_docker_is_running_process_error(): with mock.patch( 'pre_commit.languages.docker.cmd_output', side_effect=CalledProcessError(*(None,) * 4), ): assert docker.docker_is_running() is False