[westurner]

pytest-docker-pexpect: https://github.com/nvbn/pytest-docker-pexpect

Pexpect: https://pexpect.readthedocs.io/en/stable/

pytest with subprocess.popen (or Sarge) may be sufficient for checking return codes and checking stdout and stderr output streams. Pytest has tmp_path and tmpdir fixtures that provide less test isolation than Docker containers: http://doc.pytest.org/en/latest/tmpdir.html

sarge.Capture.expect() takes a regex and returns None if there's no match: https://sarge.readthedocs.io/en/latest/tutorial.html#looking...