Elixir has ExUnit which is apart of the language https://elixirschool.com/en/lessons/testing/basics https://elixirschool.com/en/lessons/testing/basics you can

Elixir has ExUnit which is apart of the language https://elixirschool.com/en/lessons/testing/basics https://elixirschool.com/en/lessons/testing/basics you can create comments above methods that act as tests