## Jeffrey Matthias
- [@idlehands](https://twitter.com/idlehands) DMs are open
- jeffrey@matthias.org
- [Testing Elixir Book](https://pragprog.com/titles/lmelixir/testing-elixir/): the sample code is downloadable without buying the book
- [Coveralls Coverage Library](https://hex.pm/packages/excoveralls)
- [Mox library for test doubles](https://hex.pm/packages/mox)