You also shouldn't test business logic. Your test code is more likely to be a liability than an asset when it isn't testing your codebase's core infrastructure.
I totally agree with this. In practice, I see much more value in tests that fully utilize your dependencies. The hard part is tying all the shit together and not getting weird stuff on the boundaries between systems. We have to tools to make such testing reproducible but it’s underutilized.
I want my tests to give me confidence. Unit tests don’t do nearly as good of a job as something that fully utilizes infra.
