These days, yes, integration test at the high level (usually a 1-to-3 liner), then unit tests as I go, often some mocked functional tests. This is basically the same but a ton faster in the AI days, you have to hold the AI accountable and demand quality and iterate, but this weekend I've built an entire test suite for a monorepo I just started working on. It's garbage quality but better than no tests, of course, and will improve as I work.

You can find some open source examples on github, either directly https://github.com/pgdogdev/pgdog/commits/main/?author=jagge... or through my profile - that repo has a pure-sql integration suite I wrote essentially entirely with AI: https://github.com/pgdogdev/pgdog/tree/main/integration/sql

There's also older work on github you can see over the years, a mishmash and grab bag, I would prefer if more of my work were open source but somehow most employers still default to closed source

Edit: While I'm thinking about it, the other thing you can do with AI is demand that it TDD things - I'm more of a "test all the fucking time" adherent, I don't care whether the tests are written first, but AI is perfectly happy to skate by making a tautological test unless you make it write the test first, ensure it fails correctly, make your change, and don't let it modify the test.