In this episode I show how to extract a Ruby Gem from an existing Rails application, test it with RSpec and Supermodel, and add a Railtie. (16 minutes)

GitHub makes it easier than ever to contribute to open source with pull requests. Here I show how to submit a pull request to the VCR project. (9 minutes)

Fixtures are external dependencies which can make tests brittle and difficult to read. In this episode I show how to use Factory Girl to generate the needed records directly in the tests. (9 minutes)

If you ever need to test an application which communicates with an external API, VCR is the way to go. Here I show a workflow in RSpec, how to use with capybara-mechanize, how to add sanitization filtering, and more. (13 minutes)

Spork improves the loading time of your test suite by starting up your Rails application once in the background. Use it with Guard for the ultimate combo in fast feedback while doing TDD. (9 minutes)

It can be difficult to test code that deals with the current time or an external web request. Here I show you how to do both using the Timecop and FakeWeb gems. (8 minutes)

Here I show how I would add tests to the password reset feature created in the previous episode. I use RSpec, Capybara, Factory Girl, and Guard to make request, model, and mailer specs. (15 minutes)

Guard watches files and runs a command after a file is modified. This allows you to automatically run tests in the background, restart your development server, reload the browser, and more. (8 minutes)

Are you testing your JavaScript? Learn how to add specs using Jasmine. This episode also covers jQuery integration with jasmine-jquery. (15 minutes)

Request specs in RSpec are a great way to ensure the entire application stack is working properly. Here I also show how to use capybara with integrated JavaScript testing using Selenium. (13 minutes)