Python testing with pytest

[ma595]

ONEFlux does not currently have any automated testing of python code. We intend to update the ONEFlux Python code to python3 (see #8 ..). Unittest tests exist, but serve to check the importing of ONEFlux only.

ONEFlux would benefit from the implementation of a GitHub workflow in which the following is done automatically upon the submission of a pull request (PR).

• Build oneflux
• Gather example data US-ARc_sample_input
• Execute integration test - possibly partitioning_nt.py step

This runs an integration test. Unit testing can be done in the same way. I would suggest using pytest as an alternative to Unittest.