4
© 2003 John D. McGregor
Selecting test
cases
Input-based
•Analyze
the data types of parameters and variables based on the problem
domain
•Partition
into “equivalence classes”
•Select
inputs from each equivalence class
•setTemperature(int
degrees) if the domain refers to water, the equivalence
classes might be degrees<32; 32<=degrees<=212;degrees>212
•We
assume that any value between 32 and 212 will cause the program to
use the same mechanism so if one value is computed correctly
then all will be
Output-based
•Based
on possible outcomes
•Win
game
•Lose
game
•Select
test data to achieve these outcomes