[FEAT] Increase test coverage to 100%

[vinijabes]

Detailed Description

Add unitary tests to cover 100% of our code.

Context

It is important that all functions of our code are covered by tests, we cant guarantee that with 100% we will have a good code, but we can have some automated checks that our new functionalities didn't break the old ones.

Possible Implementation

I think we should increase the test coverage by steps, refactoring and testing each piece of code, so we gradually reach our goal and change minimum coverage for pull request mergeability Test Coverage:

• [ ] 70%
• [ ] 80%
• [ ] 90%
• [ ] 100%