How to unit test an SQL query?

Question

I have a class DBHandler which takes a query, runs it through the SQL server, checks for errors and returns the result. How can I unit test this class?

Answer 1

You'll want to either use an in-memory test database that you create and populate on set-up or make all your tests transactional so they don't alter your test database.

You'll have to worry about the presence of data.

If you're using Spring, they have support for transactional unit tests.

It's not clear what you're asking. You already know about JUnit. What do you think you're missing?