AI Testing Discipline¶
January 23, 2026 · LinkedIn
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This week I wrote about not trusting AI-generated code until it proves itself.
Here's why.
I built something in 6 days that should have taken 9 months. Early on, all unit tests passed. Looked perfect.
Then I tested against real-world legacy files.
25% success rate.
The AI was confidently skipping things it didn't understand. German conventions. 1980s formats. Edge cases that made no sense until you knew the history.
I spent days hunting down 195 of the messiest files I could find.
Success rate went to 93%.
Those 5000+ tests I mentioned? Most exist because of edge cases that looked impossible until I found them in the wild.
The discipline is refusing to trust code that just looks right.
What's the strangest edge case you've found testing against real data?
#SoftwareEngineering #AI