While working on the tests for the next post, I was reminded of how cool MbUnit can be. Most tests have the signature of public void TestMethod(). In some cases, this causes a propagation of tests in order to accomplish running pretty much the same test with different data. MbUnit adds the RowTest attribute to the mix. With the RowTest and Row attributes you can create one parameterized test "template" and the test will run for each data item provided. Running the following code will execute 3 different tests, one for each of the Row parameters provided.

[RowTest]
[Row(2,8)]
[Row(5,5)]
[Row(8,2)]
public void GreaterValueTest(int filterValue, int expectedCount)
{
  ClassicCollectionBase results = col.FilteredCollection(new GreaterValueFilter(filterValue));
  Assert.AreEqual(expectedCount, results.Count);
}

This cool feature can help reduce the maintenance time associated with test code.

What about NUnit?

With the new features of NUnit 2.4 Andreas Schlapsi has an NUnit extension that allows for RowTests. I would expect this exceptional feature to get rolled into the core in an upcoming release.