NUnit vs xUnit: What are the differences?
NUnit: An open-source unit testing framework. An evolving, open source framework designed for writing and running tests in Microsoft .NET programming languages.It is an aspect of test-driven development , which is part of a larger software design paradigm known as Extreme Programming; xUnit: An open source, community-focused unit testing tool. It is a free, open source, community-focused unit testing tool for the .NET Framework. It is the latest technology for unit testing C#, F#, VB.NET and other .NET languages. It works with ReSharper, CodeRush, TestDriven.NET and Xamarin.
NUnit and xUnit can be primarily classified as "Testing Frameworks" tools.
xUnit is an open source tool with 2.18K GitHub stars and 554 GitHub forks. Here's a link to xUnit's open source repository on GitHub.
Heimdal Security, Ayuda, and Genasys Technologies are some of the popular companies that use xUnit, whereas NUnit is used by Air Tiger Express, Ayuda, and Credit Clear. xUnit has a broader approval, being mentioned in 5 company stacks & 7 developers stacks; compared to NUnit, which is listed in 6 company stacks and 5 developer stacks.