[mapontosevenths]

Just to add to your advice to juniors working with AI:

* Force the AI to write tests for everything. Ensure those tests function. Writing boring unit tests used to be arduous. Now the machine can do it for you. There's no excuse for a code regression making it's way into a PR because you actually ran the tests before you did the commit, right? Right? RIGHT?

* Force the AI to write documentation and properly comment code, then (this is the tricky part) you actually read what it said it was doing and ensure that this is what you wanted it to do before you commit.

Just doing these two things will vastly improve the quality and prevent most of the dumb regressions that are common with AI generated code. Even if you're too busy/lazy to read every line of code the AI outputs just ensuring that it passes the tests and that the comments/docs describe the behavior you asked for will get you 90% of the way there.

[AnimalMuppet]

And, you actually wrote the regression test when you fixed the bug, right? Right?

[ponector]

I had a colleague, senior software developer with masters degree in CS who said: why should I write tests if I can write a new feature to close sprint scope faster?

The irony is when company did lay off him due to covid the actual velocity of the team increased.

[syspec]

Sometimes the AI is all too good at writing tests.

I agree with the idea, I do it too, but you need to make sure the test don't just validate the incorrect behavior or that the code is not updated to pass the test in a way that actually "misses the point".

I've had this happen to me on one or two tests every time

[aisisiiaai]

Even more important, those tests need to be useful. Often unit tests are simply testing the code works as written which is generally doing more harm than good.

To give some further advice to juniors: if somebody is telling you writing unit tests is boring, they haven’t learned how to write good tests. There appears to be a large intersection between devs who think testing is a dull task and devs who see a self proclaimed speed up from AI. I don’t think this is a coincidence.

Writing useful tests is just as important as writing app code, and should be reviewed with equal scrutiny.

[mapontosevenths]

I agree 100%.

For some reason Gemini seems to be worse at it than Claude lately. Since mostly moving to 3 I've had it go back and change the tests rather than fixing the bug on what seems to be a regular basis. It's like it's gotten smart enough to "cheat" more. You really do still have to pay attention that the tests are valid.

[spwa4]

Yep. It's incredibly annoying that obviously these AI companies are turning the "IQ knob" on these models up and down without warning or recourse. First OpenAI, then Anthropic and now Google. I'm guessing it's a cost optimization. OpenAI even said that part out loud.

Of course, for customers it is just one more reason you need to be looking at every AI outputs. Just because they did something perfect yesterday doesn't mean they won't totally screw up the exact same thing today. Or you could say it's one more advantage of local models: you control the knobs.