Input to a Black Box Test

Test of Object-oriented Programs - slide 15 : 35

It is not realistic - from a combinatoric point of view - to test a program unit on all possible inputs

Therefore, the choice of input values to black box testing is an important concern

An equivalence partitioning splits a set of input values in a (small) number of classes.

It is hypothesized that it is sufficient to test the program unit on a single representative from each class

Include boundary representatives
- Such as empty collections and full collections
Include one or more representative for invalid input
- Typecheck and use of preconditions may eliminate this need