Convert Unit Test Cases to Pytest

[parth-rathod]

Description

The test cases which were written are being converted to Pytest framework.
The unit test code was repeated too many times in test_utils.py file.
Only thing we are trying here is to run get_config() function with different types of Input data formats.
This thing can be easily achieved by pytest parametrize

• A proper coding standard has been followed.
• Easy to understand what type of formats are supported just by looking at the tests/data folder.
• From 800 lines of code to just around 300 lines. Reducing eye cancer 😁

Fixes #39

How Has This Been Tested?

Run pytest

Checklist:

✅ I have performed a self-review of my own code
✅ I have commented my code, particularly in hard-to-understand areas
✅ I have made corresponding changes to the documentation
✅ My changes generate no new warnings
✅ I have added tests that prove my fix is effective or that my feature works
✅ New and existing unit tests pass locally with my changes
✅ Any dependent changes have been merged and published in downstream modules

[Mr-Sunglasses]

LGTM, amazing for @parth-rathod

Thanks 🤝