[m2] How does m2 recognize junit tests to be executed?

[Chris Wall]

Hey.
 
My compiled junit tests are not being executed.  How does Maven 2
determine which tests to execute?  I'm using the default
testSourceDirectory and testOutputDirectory settings  ClassA contains a
method called testGetByLastName() has the following class hierarchy:
 
ClassA -> CustomBaseTest ->
AbstractDependencyInjectionSpringContextTests ->
AbstractSpringContextTests -> TestCase
 
Thanks.
 
-Chris