Testing Internal Procedures and Internal and Private Variables
Component Testing for Ada
Black box testing is not sufficient as soon as you want to test the following:
-
Internal procedures of packages
-
Internal variables of packages
-
Private type variables
For packages, you can test internal procedures via external procedures. However, it is sometimes easier to test them directly.
You cannot modify or test internal variables with a black box approach. Internal variables are generally tested via external procedures, but it is sometimes easier to modify and test them directly also.
Private type variables are also a problem because their structure is not visible from outside the package.