I have done a similar thing. I teach juniors to follow a strict test-driven development style when handling bug fixes. Write the missing, and failing, test firs

I have done a similar thing. I teach juniors to follow a strict test-driven development style when handling bug fixes. Write the missing, and failing, test first, then make the tests pass. (I also recommend using this approach for everything). But you can't tell if they've actually done this. It makes me think that this should be automated. Seems fairly straightforward to do in test frameworks that keep the tests in separate files. Bit harder if they're in the same files, like Rust.