germsvel
Test-Driven Development with Phoenix (self-published) (free)
Hi there,
I’ve been working on a Test-Driven Development with Phoenix book. It teaches TDD and BDD by building a chat app from the outside-in. It’s still a work in progress, but the overall TDD process is clear, and the application that we build throughout the book is fully functional. So, I believe people can already benefit from it.
The book is freely available online at tddphoenix.com.
If you’re interested in the process of writing it, I talked some about it in episode 18 of the Thinking Elixir podcast
I hope some find it helpful.
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slouchpie
This is really amazing work! Well done for getting over the “fear” of sharing with the world. Karma+1 for you. 
germsvel
Why did we pick
Doormanoverphx.gen.auth?
That’s an excellent question. I picked Doorman because it was something simple at the time when I started writing the book (a couple of years ago). But changing that chapter to use phx.gen.auth (or something like that) is in my list of to-dos for v1.
If you’re interested in what else is on the roadmap for v1, I wrote a short list in TDD Phoenix Update (Nov 2020)
mstibbard
I ended up switching to Linux just to follow this tutorial as I never figured out how to fix those Windows permissions, and I can confirm it was well worth it. This was exactly what I needed - fantastic work.
I’d advise new Elixir/Phoenix coders follow this book even if they never intend to do TDD… it’s such a great way of learning as it helps you grasp the logic (and in particular what common errors mean) much quicker than just trial and error. Although I have a feeling most people will be keen on TDD by the time they are done 
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