Great episode, Chris. I like how you said you don't really need to test CSS styling but instead focus on testing the higher level functionality of your mailers. That way, a developer doesn't go down a rabbit hole writing too fine grained tests.
Also, the last point about ActionMailer::Base.deliveries makes me wonder what the difference is between that and assert_emails.
Join 30,005+ developers who get early access to new screencasts, articles, guides, updates, and more.