Add Test Coverage for Transformers import

[abarbosa94]

Description

• This PR adds a simple set of unit tests to properly cover transformers' import use cases

[aaarrti]

Do I understand correctly, that you're using pytest-mock to simulate the case when transformers package is installed / is not installed? I'd recommend to create different tox environments for this, instead of mocking parts of pythons import logic.

[aaarrti]

Hi @abarbosa94,

could you please make sure the original state is restored after this function exits? This can be done using context-manager fixture, e.g., https://github.com/understandable-machine-intelligence-lab/Quantus/blob/main/tests/metrics/conftest.py

[aaarrti]

@abarbosa94, I believe that the test failures are caused by conflicting mocks. In case not, please don't spend too much time debugging those, i.e. this is a green light from me to just delete the failing tests (and unnecessary overcomplicated mocks)

[annahedstroem]

@abarbosa94, I believe that the test failures are caused by conflicting mocks. In case not, please don't spend too much time debugging those, i.e. this is a green light from me to just delete the failing tests (and unnecessary overcomplicated mocks)

please see my answer on Slack! perhaps easiest and safest if you @aaarrti delete those mocks and dependencies? perhaps just push to this PR