Data-driven tests with jUnit

Question

What do you use for writing data-driven tests in jUnit?

(My definition of) a data-driven test is a test that reads data from some external source (file, database, ..

Answer 1

Some tests will lend themselves to being interface driven.

If the database/file reads are retrieved by an interface call then simply get your unit test to implement the interface and the unit test class can return whatever data you want.