Unit Testing with functions that return random results

Question

I don\'t think that this is specific to a language or framework, but I am using xUnit.net and C#.

I have a function that returns a random date in a certain range. I

Answer 1

Methods that do not exhibit a deterministic behavior cannot be properly unit-tested,as the results will differ from one execution to another. One way to get around this is to seed the random number generator with a fixed value for the unit test. You can also extract the randomness of the date generation class (and thus applying the Single Responsibility Principle), and inject known values for the unit-tests.