Slow database test fallacy (DHH)
By David Heinemeier Hansson on April 30, 2014 The classical definition of a unit test in TDD lore is one that doesn't touch the database. Or any other external interface, like the file system. The justification is largely one of speed. Connecting to external services like that would be too slow to get the feedback cycle you need. That was probably true in 1997 when you were connecting to a mainfra
Test-induced design damage (DHH)
By David Heinemeier Hansson on April 29, 2014 "Code that's hard to test in isolation is poorly designed", goes a common TDD maxim. Isolation meaning free of dependent context and separated from collaborators, especially "slow" ones like database or file IO. The prevalent definition of "unit" in unit testing (though not everyone agrees with this). This is some times true. Some times finding it diff
TDD is dead. Long live testing. (DHH)
By David Heinemeier Hansson on April 23, 2014 Test-first fundamentalism is like abstinence-only sex ed: An unrealistic, ineffective morality campaign for self-loathing and shaming. It didn't start out like that. When I first discovered TDD, it was like a courteous invitation to a better world of writing software. A mind hack to get you going with the practice of testing where no testing had happen
Rails is omakase (DHH)
By David Heinemeier Hansson on Dec 27, 2012 There are lots of à la carte software environments in this world. Places where in order to eat, you must first carefully look over the menu of options to order exactly what you want. I want this for my ORM, I want that for my template language, and let's finish it off with this routing library. Of course, you're going to have to know what you want, and y
David Heinemeier Hansson (DHH)
I write regularly on HEY World and speak on The REWORK Podcast. You can also find me on X, LinkedIn, Instagram, and YouTube. Or send me an email to dhh@hey.com. Creator of Ruby on Rails Hundreds of thousands of programmers around the world have built amazing applications using Ruby on Rails. The open-source web framework that I created in 2003, and continue to develop to this day. Some of the more
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