Ever wanted an editor and Rails environment you can use anywhere? Cloud9 is the perfect option for this and can run on an EC2 instance in your AWS account.

Dependency Injection is a common technique for making your code more flexible and testable by removing strict dependencies upon other classes, modules, and other types of dependencies in your code

Test suites often become brittle over time where small changes end up breaking various tests. One way to avoid that is by avoiding using hardcoded values in your test suite.

Rails provides several helper methods for testing times and dates in your applications. You can now freeze time and time travel like in the movies!

Learn how to test Active Job in your Ruby on Rails application

Learn how to set up GitHub Actions to run Continuous Integration (CI) with Ruby on Rails

System tests allow you to use a browser for testing your Rails app including Javascript

Adding Devise test helpers allows you to quickly login a user for testing controllers in Rails

Learn how to write tests for validations on ActiveRecord objects in Ruby on Rails

With Rails 6.0, you can now define multiple primary and replica databases, define separate migrations for each primary database, and configure each model to read and write from different databases.