Add unit tests; set up GitHub Actions?

[ChanceNCounter]

The code's not too well documented, but, between my downtime and random passersby, this seems like it oughta be doable in October. test-requires currently has pytest and pytest-cov.

Also, GitHub Actions to run those unit tests would be a bonus. Coverage is the bigger deal.

[rexdivakar]

Hey @ChanceNCounter i would love to do this can you assign it to me ?

[ChanceNCounter]

you betcha! good luck and sorry about the state of the codebase. be advised of possible merge conflicts, but i'm happy to engage my git-fu if yours isn't so hot.

thanks for your interest!