fsharp-hedgehog VS Cardizer

Unit testing: I personally use FsUnit, specifically FsUnit.Xunit. There's some other libraries like Expecto and Hedgehog (property testing), but I haven't found a reason to use them. I recently started experimenting a little with Hedgehog. FsUnit integrates well into Visual Studio, since it sits nicely on top of NUnit and xUnit, and it's done everything I've needed so far.

Looks cool. Is there a reason why you didn't use FsCheck or Hedgehog? They're built to generate random data for testing, and can return the seed if a test fails so you can rerun the test with the exact same data once you figure out what the problem is - which is useful if the failure condition is rare.

Haskell has QuickCheck and Hedgehog, and dotnet has both as well. F# is favored, but there's C# interop.

Dotnet has FsCheck and Hedgehog. Both are primarily aimed at F#, but C# is supported as well.

Hedgehog

With others developers, we convinced our employer to start pushing officially code originally made internally. Most of the code will be shared under the MIT license. From this initiative I just released openly my first library: Cardizer. It is a dotnet lib written in F# (ofc). We use it to generate randomize but valid credit card number for testing purpose. Its implementation is quite naive so feel free to comment what I can improve! I plan to try an type driven approach later on.