Property-Based Testing with PropEr, Erlang, and Elixir

Introduction

When I finished my first book, Learn You Some Erlang, I told myself “never again.” There’s something distressing about spending months and years of work writing a book, spending all bits of free time you can find on it, putting aside other projects and hobbies, and rewriting your own texts close to a dozen times. You reach the point where before you’re even done, you’re tired of writing about the topic you chose to write about.

I knew all of that was waiting for me if I ever wanted to write another book. I decided to do it anyway because I truly believe property-based testing is something amazing, worth learning and using. In fact, part of the reason why I wanted to write a book was that I wanted to use property-based testing in ...