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Fast Tests
Episode #413Apr 10, 201335 comments

Fast Tests

A slow test suite can put a damper on test-driven development. In this episode I show a variety of ways to optimize specs including: selective testing, preloading Rails, and testing outside of Rails. (17 minutes)
A Tour of State Machines
Episode #392Nov 17, 201225 comments

A Tour of State Machines

Here I show how three popular state machine gems can be used to clean up a list of boolean/datetime fields. I also show a custom solution which keeps track of the history of events. (12 minutes)
Site-Wide Announcements (revised)
Episode #103Nov 12, 201232 comments

Site-Wide Announcements (revised)

Here I show how to add an announcement message at the top of every page in the application and allow the user to permanently hide it. This is all done test-first and even includes testing the JavaScript behavior. (11 minutes)
Testing JavaScript with PhantomJS
Episode #391Nov 07, 201220 comments

Testing JavaScript with PhantomJS

PhantomJS allows us to test JavaScript without going through a browser window. Here I show how to do this using Capybara and Poltergeist. I also give some tips on handling database transactions and skipping javascript tests. (10 minutes)
Testing JavaScript with Jasmine (revised)
Episode #261Jun 28, 201220 comments

Testing JavaScript with Jasmine (revised)

The jasminerice gem makes it easy to test your JavaScript with Jasmine in a Rails application. Here I also cover jasmine-jquery and guard-jasmine. (11 minutes)
MiniTest with Rails
Episode #327Feb 21, 201239 comments

MiniTest with Rails

MiniTest is a fast and lightweight testing library. Here you will learn how to use it in a Rails app for model, helper, and integration testing. The Turn gem is also demonstrated for prettier test output. (15 minutes)
Extracting a Ruby Gem
Episode #301Nov 21, 20119 comments

Extracting a Ruby Gem

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)
Contributing to Open Source
Episode #300Nov 21, 201113 comments

Contributing to Open Source

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)
Factories not Fixtures (revised)
Episode #158Oct 27, 201119 comments

Factories not Fixtures (revised)

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)
Testing with VCR
Episode #291Oct 17, 201132 comments

Testing with VCR

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)