All Lessons

Fixing Brittle Tests: Avoid Hardcoded Values

#324 · Dec 23, 2019

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.

Refactoring Rubocop GitHub Action

#323 · Dec 16, 2019 Pro

Today we're refactoring Andrew Mason's GitHub Action that runs Rubocop against your repository. We'll pull out some concepts, remove conditionals, and use several other techniques to clean up the code.

Testing Rails ActionCable with Devise

#322 · Dec 09, 2019 Pro

Testing ActionCable authentication with Devise is pretty easy, especially when we build our own helpers to stub out Warden

How to test ActionMailer in Rails

#321 · Dec 02, 2019 Pro

Rails provides several really useful test helpers for ActionMailer so we can quickly iterate on our design, test that our code queues up the right emails, and make sure our emails contain the right content.

Testing Times & Dates with Rails

#320 · Nov 20, 2019

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!

How to Test Background Jobs with Active Job

#319 · Nov 13, 2019

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

Testing External APIs with VCR

#318 · Oct 29, 2019 Pro

Testing integrations with external APIs in your Rails app can be hard. You don't know what requests are being made (or even the responses), so how can you properly mock them out? VCR to the rescue.

Testing API Integrations with WebMock

#317 · Oct 23, 2019 Pro

GitHub Actions with Ruby on Rails: Setting up Continuous Integration

#316 · Oct 17, 2019

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

How to write System Tests in Rails

#315 · Oct 09, 2019

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