ASP.NET Core has been designed from the ground up with testability in mind. XUnit is the open source testing framework the ASP.NET team uses to test their own code. xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. Written by the original inventor of NUnit v2, xUnit.net is the latest

Software Testing Magazine

ASP.NET Core emphasizes testability, utilizing the xUnit framework for testing. xUnit.net, an open source tool authored by the creator of NUnit v2, supports unit testing across various .NET languages. It integrates seamlessly with command line tools, Visual Studio, and other development environments. The presentation demonstrates how to incorporate tests into an ASP.NET Core project and simplify dependencies.

.NET Testing Best Practices