Join me on a thought experiment: How does my time-tested approach to testing Ruby on Rails applications apply to the tools we get from the framework? Whether you're new to Rails testing, or curious about the default testing stack, Testing Rails from Scratch gives you a pragmatic, end-to-end introduction to test-driven development. Covers Rails 8.1 and Ruby 4.0. Early release now available for sale on Leanpub!
If you liked my series on practical advice for adding reliable tests to your Rails apps, check out the expanded ebook version. Lots of additional, exclusive content and a complete sample Rails application. Updated in 2026 to Rails 8.1 and Ruby 4.0!
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