This repository contains code presented at the Python Frederick talk from February 2016. The code demonstrates the basics of unit testing. It is not an exemplary demonstration of great API design. The sample project, a calculator, is a straight forward concept to expore and helps to avoid distraction from the real subject matter: testing.

The code shown here is the final state of the demonstration. There are various git tags to represent the different steps in the process. Each tag has a name like step1. To view the number of steps, run git tag from a terminal. To look at an individual step, run git checkout stepX where X is the number in the step sequence.