Tests are executed with run.py script. Run it with --help or see its source to view the usage. Actual test cases and test libraries used by them are in tests and libs directories, respectively.

Running tests requires having both Robot Framework 2.8.4 or newer and robotstatuschecker installed. Easiest way to install them is using pip:

pip install 'robotframework>=2.8.4'
pip install robotstatuschecker