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Property based testing in C#–CsCheck

Almost a year ago I wrote a series of blog posts on how to use property-based tests in C#.

In this series I used FsC as the library of my choice. Although originally created for F#, it also works for C# as I have demonstrated.

FsCheck logo - an inverted A, the mathematical symbol for forall.

However as it was originally created for F#, it sometimes feels strange when using FsCheck in C#. If you prefer a more idiomatic alternative, you can have a look at CsCheck, also inspired by QuickCheck but specifically created for C#.

CsCheck offers no specific integration but can be used with any testing framework(XUnit, NUnit, MSTest, …).

Here is a small example:

CsCheck does it really well in the shrinking challenge and offers support for multiple types of tests including concurrency testing.

This is a feature I really like as concurrency related issues are really hard to find and debug. When writing this type of tests, you specify a set of operations that will be executed concurrently and then be compared with linearized execution.

Here is an example:

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