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AI Unit Tests: Hype vs My 4-Hour Night

21 March 2026 · 67 views

AI tools promise: "Unit tests in seconds!" (Copilot, Claude, etc.)

My night struggling with Aider and local (small) LLMs:

  • AI invented "ApiKeys" table (real name: Authorizations).
  • Picked wrong test tool (MSTest instead of xUnit).
  • Said "Done!" but files empty.

Still no good results in 4 hours (I could have done this manually in 1 hour). Lesson: AI helps a lot, but you must check everything and take a lot of time to prepare.

With my technical background, I prefer to explore and gain more experience rather than buying off-the-shelf cloud products. Free local AI (like Phi3, Qwen2.5, DeepSeek) = unlimited power; cloud AI is smoother but expensive and less secure.

(Deja vu: Same as with my multi agent hangman game: days of tuning prompts/history/temp!)

Anyone else trying Aider with local LLMs? Which model?

Co-authored with Claude.

If this was useful, you can buy me a coffee.

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