TDD is head, or haven't you heard 🙂 - http://david.heinemeierhansson.com/2014/tdd-is-dead-long-live-testing.html

This would be interesting. Maybe you can show Codesmith with a couple examples? If there are more patterns you use, then maybe a second article? I'm trying to teach people how to write tests and jumpstart their knowledge rather than having them stumble a bit.