[WIP] Adding some unit tests

[rafaelverger]

Closes #7

Modules I will add tests:

• [x] src/lib/job
• [ ] src/lib/rss

[rafaelverger]

@di3goleite @RodolfoSilva besides those two module I'm aiming to create tests, do u think on other module should be handled in this PR?

[di3goleite]

A W E S O M E ! ! ! LGTM @rafaelverger ! Great Job! 🎉