Please add testing

[NewMountain]

Hi @flacle !

First, thank you all for your work. Some colleagues of mine have expressed interest in this script and have requested a few features in line with some of the current issues (which I would also like to contribute ;) ).

Before I work on these features, I wanted to establish a safety net so I don't break anything. As such, I would like to request (and then submit) some unit tests to make sure functionality does not regress.