https://www.gov.uk/guidance/software-developer
Not all types of code can be automatically tested. You can do unit testing on some systems. I’m not convinced the people that wrote this guidance actually thought about it that much.
So looking at the list and checking off which things I have already done. I would rate myself as practitioner skill level.
Good luck with that Pete. 🙂 You should have used the checksums like I said.