Testing strategies

[genedan]

I think it's time to at least start thinking about how to go about creating a testing suite. This is motivated by the move to stricter version requirements for the dependencies, only upgrading to newer version of say, pandas, numpy, and chainladder if we can get all the tests to pass.

This one is a bit tricky since we have to test GUI features like clicking on things and so on. One package I came across was:

https://github.com/pytest-dev/pytest-qt

Which seems to revolve around using a bot to simulate GUI actions. Another idea is that we create a sample database to test off of in addition to the CSV sample files.