In this series, we're building https://animatedgif.me from scratch using Shrine. We'll start designing our database models, then get into designing our UI, writing tests and finally deploying our app to production.

Testing Ruby on Rails applications isn't hard, but you have to learn the basics well. We'll cover how to write unit tests, system tests, integration tests and more. We'll also explore mocks, stubs, factories, fixtures, minitest vs rspec and much more.

A list of features showing what's new in Rails 6.0.

Everyone has a dream of being able to contribute to Rails core. It's quite a hard thing to do, but there are some helpful ways to approach it which can make finding bugs or features to fix in Rails much easier. We'll discuss how to learn the Rails code base and poke around until you find what you're looking for in order to modify Rails to add your feature and then write tests to test it.