Rewrite current tests to use a unit testing framework + parameterized

Presently, our one test script for SEMC Appion doesn't use a unit test framework like pytest or unittest. Ideally, we could use a large number of values produced by classic Appion to test our calculations. Instead of writing assert statements ad infinitum, I'd like to store the outputs of classic Appion in a human-editable YAML file and use parameterized to perform data-driven testing.