Write unit tests for helper functions

[CodeProKid]

The helper functions in here can probably use unit tests as coverage, since they are accessed in multiple places within the codebase

[CodeProKid]

I started this here -> https://github.com/dfmedia/wp-plugin-dictator/tree/feature/2 Need to pull it back in and add to it. The setup was a little more complicated since I'll be using codeception + docker to do the acceptance/functional tests in #3