How do I unit test persistence?

Question

As a novice in practicing test-driven development, I often end up in a quandary as to how to unit test persistence to a database.

I know that technically this would

Answer 1

For NHibernate, I'd definitely advocate just mocking out the NHibernate API for unit tests -- trust the library to do the right thing. If you want to ensure that the data actually goes to the DB, do an integration test.