gen_state_machine v1.0.0 released: an Elixir wrapper for OTP 19's gen_statem Family Ties Part 8 posted, discussing module attributes and the preprocessor

Property Based Testing in Elixir

An introduction to QuickCheck-style property based testing and a walkthrough demonstrating how to use properties to test a quicksort implementation.

https://travispoulsen.com/blog/posts/2016-06-22-Property-Based-Testing-in-Elixir.html