Chore(misc): Unit testing and testing environment

[mamsoudi]

Is your feature request related to a problem? Please describe. In order to be able to test the features we need an environment in which we'll be able to test the code.

Describe the solution you'd like In order to test the functionality we can add Unit tests and we can initialise a testing environment.

Describe alternatives you've considered Having npm serve run a testable API which users can run to test and see the results.