Add unit tests for tuning/config/configs.py

[tedhtchang]

Is your feature request related to a problem? Please describe.

Add unit tests for the tuning/config/configs.py module.

Describe the solution you'd like

If possible, each function should have test cases in the file tests/config/test_configs.py
and pass test with the command pytest tests/config/test_configs.py

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

Add any other context about the feature request here.

[tedhtchang]

I realized a lot of the unit tests have been covered by the the PR#83 so I think we should close this issue unless we have other test cases.

[tedhtchang]

PR#94 also tested configs module.