====== Unit-Tests in Python ======

  * https://code.tutsplus.com/tutorials/write-professional-unit-tests-in-python--cms-25835
  * https://medium.com/@rinu.gour123/unit-testing-with-python-unittest-ad045671010
  * https://docs.python-guide.org/writing/tests/
  * https://realpython.com/python-testing/#writing-your-first-test
  * https://www.journaldev.com/15899/python-unittest-unit-test-example

  * https://tox.wiki/en/latest/ -- tox aims to automate and standardize testing in Python