TL/DR: The last time we looked at this code, we wrote property tests. The property tests used generators to create input, but the actually testing of the invariants was just regular Elixir code. In this post, we’ll look at rewriting those property tests as standard ExUnit tests, giving us better unit tests. Link: https://medium.com/perplexinomicon-of-philosodad/preparing-to-refactor-with-better-unit-tests-51e27659fe5e