Drew DeVault
The cults of TDD and GenAI
I’ve gotten a lot of flack throughout my career over my disdain towards test-driven development (TDD). I have met a lot of people who swear by it! And, I have also met a lot of people who insisted tha
Daily Digest
Why TDD and AI coding tools exploit the same psychological flaws
Drew DeVault draws a provocative parallel between Test-Driven Development cults and GenAI adoption, arguing both exploit developers' psychological need to feel competent while potentially undermining actual code quality.
- TDD's hidden influence on architecture: While ensuring test coverage, TDD shapes codebases to be "testable" rather than well-designed, and provides no guarantee that passing tests verify the right behavior for actual user needs.
- The dopamine trap of development metrics: Both TDD's green test suites and AI's rapid output create addictive feedback loops through coverage percentages, CI badges, and productivity metrics that make developers feel competent regardless of actual code quality.
- AI coding agents as the new performance theater: GenAI tools let mediocre programmers experience the rush of 10x developer productivity, building "cathedrals" quickly that have beautiful test coverage but rotten foundations underneath.
- The psychological cost of shortcuts: Developers chase these tools despite knowing the externalities (environmental costs, job displacement) because the feeling of finally being "great" at programming overrides long-term concerns.
#tdd-psychology#ai-code-generation#developer-productivity-metrics#software-testing-culture#programming-dopamine-loops
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Drew DeVault
The cults of TDD and GenAI
I’ve gotten a lot of flack throughout my career over my disdain towards test-driven development (TDD). I have met a lot of people who swear by it! And, I have also met a lot of people who insisted tha
Martin Fowler
Bliki: Excessive Bold
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Sylvain Kerkour
Deep dive into Turso, the "SQLite rewrite in Rust"
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Cassidy Williams
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Martin Fowler
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Chris Short
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Seth Michael Larson
Use “\A...\z”, not “^...$” with Python regular expressions
Two years ago I discovered a potential foot-gun with the Python standard library “re” module. I blogged about this behavior, and turns out that I wasn't only one who didn't know this: The article was
Sylvain Kerkour
Do nothing, but do it well
There are some days like that where your brain simply refuse to work, and too bad for you but your job relies entierly on your brain. What if instead of
Ned Batchelder
Testing: exceptions and caches
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