clipped from: weblogs.asp.net The latest release of TestDriven.Net is now compiled against NUnit 2.4.7. This version of NUnit includes Andreas Schlapsi's popular RowTest extension. The RowTest attributes have been moved to the 'nunit.framework.extensions' assembly (which you can find here: \Program Files\TestDriven.NET 2.0\NUnit\2.4\nunit.core.extensions.dll).
The prime number function might look like this:
As you can see the intention of the test is very clear and there is no repetition. I've written more about parameterized unit tests here.