Authors are strongly encouraged to include an automated test suite covering the core functionality of their software.
Good: An automated test suite hooked up to an external service such as Travis-CI or similar
OK: Documented manual steps that can be followed to check the expected functionality of the software (e.g. a sample input file to assert behaviour)
Bad (not acceptable): No way for you the reviewer to check whether the software works
Authors are strongly encouraged to include an automated test suite covering the core functionality of their software.