C# Класс Xunit.PairwiseStrategy

The number of test cases that cover all possible pairs of test function parameters values is significantly less than the number of test cases that cover all possible combination of test function parameters values. And because different studies show that most of software failures are caused by combination of no more than two parameters, pairwise testing can be an effective ways to test the system when it's impossible to test all combinations of parameters.

The PairwiseStrategy code is based on "jenny" tool by Bob Jenkins: http://burtleburtle.net/bob/math/jenny.html