Introduction to pairwise testing
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A brief introduction to pairwise testing technique. Also a list of common tools for automating a process of selecting the right number of pairs for testing;
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Introduction to pairwise testing
- 1. Introduction to pairwise testing Alexandr Romanov
- 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 Combination number Bed linen Tea 1 checked checked 2 unchecked checked 3 checked unchecked 4 unchecked unchecked
- 5. Pairwise testing: give us an example
- 6. Pairwise testing: give us an example Combination number Seat type Bed linen Tea Gypsies Demobees 1 Berth checked checked checked checked 2 Coupe checked checked checked checked 3 Lux checked checked checked checked 4 Berth unchecked unchecked unchecked unchecked 5 Coupe unchecked unchecked unchecked unchecked 6 Lux unchecked unchecked unchecked unchecked 7 Berth unchecked unchecked unchecked checked 8 Coupe unchecked unchecked unchecked checked ... ... ... ... ... ... Combinations (all): 3x2x2x2x2 = 48
- 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;