Add tests

[ifennna]

All the actions (and the helper functions) need to have tests.

[davidmungai]

Hey , I would love to help out , would you guide on how I can get started

[ifennna]

Hi. Sorry for the delay, just seeing this. I think the code for some of the commands is too tightly bound to the database. The first thing needed will probably be to rewrite things so that the DB can be substituted with a map, and then writing test cases for each one.

I'm working on this, but progress is very slow since I don't have so much time to dedicate to it.