Add tests

[rodrigomilisse]

Add tests to test multiple paths as inputs
-Currently in multiple_args branch only

[CatarinaGamboa]

We don't need to create a new issue for each small change in the PRs. Issues are more high-level descriptions of problems that we need to address or features that we need to add, instead of low-level changes to a PR or a given branch.

We can also track smaller steps for a larger issue by having a main issue and then the tasks as sub-issues, like:

• Issue: "add support for multiple files verified at the same time"
• Sub-issue: "add tests" specific to test this enhancement

If you are interested, there are more details on this in Github guidelines

[rcosta358]

Implemented in #49.