Testing Episodes - Ruby on Rails Screencast Tutorials

Learn how to write your own test helpers to build assertions. In this lesson, we're adding some test helpers to the turbo-rails gem to assert that turbo-frame tags in the response.

26m

Adding Sales to the black_friday gem

Dec 02, 2024 Pro

Calculating dates is helpful, but what if we took the black_friday gem a step further by adding sales?

26m

How to Test OmniAuth with Rails

Testing OmniAuth integrations in your Rails app can be straightforward for basics, but there's not a lot of documentation about testing other things like OmniAuth Params. This episode, we'll test registration, login, and OmniAuth params.

16m

Testing a Meilisearch Integration with Ruby on Rails

May 02, 2022 Pro

Testing your Meilisearch integration in Rails can be a little tricky. This episode, we'll talk through how to setup Meilisearch in your test suite to index fixtures and more.

Testing Against Multiple Databases in Rails with The DATABASE_URL Env Var

Apr 11, 2022 Pro

Rails apps and Rubygems might need to support multiple databases. We can use the DATABASE_URL environment variable to quickly swap out the database that Rails uses in CI, local testing, and more.

18m

System Testing File Uploads in Rails with Uppy and Dropzone Drag & Drop

Jan 26, 2022 Pro

Learn how to use system tests for file uploads with file input fields and drag & drop with Uppy and Dropzone

15m

Using TDD To Fix A Bug In The Kredis Gem

Dec 06, 2021 Pro

I found a bug in the Kredis gem the other day and wanted to walk you through my thought process on debugging and using TDD to fix the bug for the future.

14m

Testing against multiple versions of Ruby, Rails, and Databases with GitHub Actions

Nov 30, 2020 Pro

Testing a gem or your Rails app against multiple Ruby and Rails versions is super useful, but we also take it a step further and test our gem against several different databases too

26m

How to Upgrade Old Projects: ActsAsTenant

Nov 17, 2020 Pro

ActsAsTenant needed some maintenance so we're going to walk through the steps of refactoring the gem and Rspec test suite

11m

Improving the Rails Conductor for Inbound Emails & ActionMailbox

Jul 14, 2020 Pro

Contribute to Rails by discovering something you could improve and learning how to add features to Rails

22m

Testing File Uploads in Rails with Shrine

Mar 23, 2020 Pro

Testing file uploads can be tricky, but Shrine makes both file uploading and testing a lot easier than you might expect.

16m

Testing ActiveStorage File Uploads and Fixtures

Feb 17, 2020 Pro

Learn how to test ActiveStorage file uploads and create fixtures with ActiveStorage attachments

How to use Mocks in Ruby tests

Jan 13, 2020 Pro

Mocks are a handy tool for writing tests in Ruby. You can use them to fake an object and verify that the correct methods were called against it. Perfect for testing a method that integrates closely with another class or module.

How to use Test Stubs with Minitest

Dec 30, 2019 Pro

Test stubs are very handy when you want to mock out the response to a method call. This allows your tests to be more reliable and skip long running or unnecessary method calls.

12m

Testing Rails ActionCable with Devise

Dec 09, 2019 Pro

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

13m

How to test ActionMailer in Rails

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.

10m

Testing External APIs with VCR

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

Oct 23, 2019 Pro

WebMock is a fantastic way to stub out and mock your HTTP requests. It will actually throw an exception in your test suite when an HTTP request is made so that you know when you're hitting an external API that you haven't stubbed out correctly.

14m

How to write Controller & Integration Tests in Rails

Oct 02, 2019 Pro

Learn how to write integration tests in Rails to test controllers and actions

13m

How to use Fixtures to create sample test data

Sep 18, 2019 Pro

You can use Fixtures in Rails to create sample database records for your tests to run against. They're easy to setup and extremely quick.

Filter By

All Episodes Free Episodes Pro Episodes

Sort By

Published Date Popularity

Adding Turbo Frame Test Helpers

Jun 16, 2025 Pro