Introduction to pairwise testing

1. Introduction to pairwise testing Alexandr Romanov Ciklum

2. What is pairwise testing? Google it! • Pairwise (all-pairs) testing is an effective test case generation technique that is based on the observation that most faults are caused by interactions of at most two factors. • Pairwise-generated test suites cover all combinations of two therefore are much smaller than exhaustive ones yet still very effective in finding defects.

3. Pairwise testing: give us an example • Simple • Combinations: 2x2 = 4

4. Pairwise testing: give us an example • Simple

5. Pairwise testing: give us an example

6. Pairwise testing: give us an example • Combinations (all): 3x2x2x2x2 = 48

7. Demo • Combinations (pairwise technique applied) = 6

8. Do we need to do it manually? Tools: - All-pairs - free - PICT - free - Jenny - free - Hexawise free/commercial others;

9. Should we use pairwise everywhere?! • Always remember: • - Use pairwise testing technique when it’s necessary; • - Explore your system under test; • - Select the right values to test with; • - Pay attention to high probable fail combination;

10. Questions? • Alexandr Romanov • skype: alex_roma_nov • email: al8x.romanov@gmail.com