Using F# for testing
fsharpforfunandprofit.com
fsharpforfunandprofit.com
http://www.infoq.com/presentations/mock-fsharp-tdd
Mark Seemann also has a F# Unit Testing course on Pluralsight if you're interested in applying this in practice (Pluralsight is awesome by the way, it's not free but if your company can afford it I can definitely recommend it, especially if you use Microsoft products in your tech stack):