Refactor/refactor code to enable testing

[neodmy]

Main changes

• 🔄 (refactor)

In order to enable unit and end-to-end testing, I propose to split the code into several parts:

• The index.js has been simplified and acts as a dependency injector and the only point for error handling:
  • Retrieves the arguments from yargs
  • Uses a middleware to run some checks and transform certain arguments. For instance, the arguments passed to failOn might include a RegEx. These RegExs must be valid.
  • Execute the core logic by calling the licence-checker, which is now wrapped in a promise

Additional notes

(optional)

Context

• 🎫 Closes / Relates Refactor code to enable testing #51

[inigomarquinez]

Awesome refactor, @neodmy !

I've added some comments and questions.

Apart from that, perhaps we need to discuss where to place some functions. The code as you left it after the refactor looks very clean and organized. However, there is already a utils file, and we have methods both in the runner and utils files. So perhaps we can move all to one single file. What do you think?

[neodmy]

Awesome refactor, @neodmy !

I've added some comments and questions.

Apart from that, perhaps we need to discuss where to place some functions. The code as you left it after the refactor looks very clean and organized. However, there is already a utils file, and we have methods both in the runner and utils files. So perhaps we can move all to one single file. What do you think?

Sure 👍

[inigomarquinez]

LGTM!

[inigomarquinez]

LGTM!