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.

In this series, we'll cover how to use Javascript and CSS in Rails. We've covered how to use Javascript and CSS with the asset pipeline, but now we're showing you how to use Webpacker to load Javascript and CSS with Rails.

Reviewing and refactoring code is a core piece of the development lifecycle. In this series, we'll review and refactor code from subscribers and open source projects to see if we can find some clearer ways of accomplishing the same features.