1: write test method in a subclass (the implementation class), the method calls the inherited parent class has been achieved.
Write test classes, test classes with the beginning of the statement.
"! @testing CL_CRMS4_TECHOBJ_SEARCH_SRV，
Wherein: CL_CRMS4_TECHOBJ_SEARCH_SRV is an abstract class (parent class) for a write test classes can be used to test coverage of the parent class.
Call the inherited method.
2: View coverage abstract class (parent class) method, performing t-code: sut
3: Fill select classes and parent classes include foreign related tests (test the above classes include the room).
4: The parent class test coverage.
