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Pairwise testing (known as allpairs testing all pairs testing, pair-wise testing, and orthogonal array test design) is a simple but extremely powerful test design approach.
It helps testers create tests faster, create more powerful and thorough tests, and reduce the number of tests they need to execute. But what does "pairwise coverage" mean? Exactly? What is 3-way coverage? This pairwise testing tutorial clearly explains these fundamental test coverage concepts.