Just to be clear, the code inside of the lib and test directories is not actually inside of our rails application. They're inside of a different git repository

Just to be clear, the code inside of the lib and test directories is not actually inside of our rails application. They're inside of a different git repository and are packed as a separate gem. It makes more sense to me once you've isolated the code this way that you would then write "use case tests" and then role tests (which I haven't gotten into yet.. next post :))