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Introduction to pairwise testing

Alexandr Romanov
What is pairwise testing? Google it!

Pairwise (all-pairs) testing is an effective test
case generation technique that is ...
Pairwise testing: give us an example

Simple

Combinations: 2x2 = 4
Pairwise testing: give us an example
Simple
Combination number

Bed linen

Tea

1

checked

checked

2

unchecked

checked...
Pairwise testing: give us an example
Pairwise testing: give us an example
Combination
number

Seat type

Bed linen

Tea

Gypsies

Demobees

1

Berth

checked

...
Demo
Combination

Seattype

Bedlinen

Tea

Gypsies

Demobees

1

Berth

checked

checked

checked

checked

2

Berth

unch...
Do we need to do it manually?

Tools:
- All-pairs - free
- PICT - free
- Jenny - free
- Hexawise free/commercial
others;
Should we use pairwise everywhere?!

Always remember:
- Use pairwise testing technique when it’s
necessary;
- Explore your...
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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. 1. Introduction to pairwise testing Alexandr Romanov
  2. 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. 3. Pairwise testing: give us an example Simple Combinations: 2x2 = 4
  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. 5. Pairwise testing: give us an example
  6. 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
  7. 7. Demo Combination Seattype Bedlinen Tea Gypsies Demobees 1 Berth checked checked checked checked 2 Berth unchecked unchecked unchecked unchecked 3 Coupe checked unchecked checked unchecked 4 Coupe unchecked checked unchecked checked 5 Lux checked checked unchecked unchecked 6 Lux unchecked unchecked checked checked Combinations (pairwise technique applied) = 6
  8. 8. Do we need to do it manually? Tools: - All-pairs - free - PICT - free - Jenny - free - Hexawise free/commercial others;
  9. 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;

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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