Top 20 NuGet testing Packages

My Tested ASP.NET Core MVC helper components.
My Tested ASP.NET Core MVC is a powerful testing library providing easy fluent interface to test the ASP.NET Core MVC framework.
A self hosting HTTP server for testing.
Library contains set of reusable actions and assertions for StoryLine library.
CNUnit - tool to run concurrent tests using many instances of NUnit Console Runner. For example for not threadsafe tests
A chaos testing library for .NET. Ruh Roh allows you to reconfigure your dependencies (like an HTTP service) in order to simulate service outages, slow network connections, and so on. This can help to improve your software and allows for testing these - and more! - scenarios without having to actual...
Extensions and utilities for XUnit.NET test projects This includes API for making tests dynamically skippable, asserting timeouts on async tasks, and other helpful utilities. Commonly used types: McMaster.Extensions.Xunit.SkippableFact McMaster.Extensions.Xunit.SkippableTheory
Visual Testing framework to allow tests written in Selenium to compare screenshots and highlight any differences
Fettle is an experimental mutation testing tool for C# code. It can mutate C# code that runs on the .NET Framework (Mono or .NET Core are not supported). If your tests use NUnit 3, Fettle will use them by default (version 3.10 or higher recommended). Or if you use another framework, or need to run ...
Simple test fixture pattern
Auto Health Check abstractions.
Bringing Jest-esque Snapshot testing to C# See Project Site for more details
Common code for all SignalR.UnitTestingSupport.* nugets . If you want support for unit testing signalR core (Hub and IHubContext) use one of this packages (NUnit, xUnit, MsTest version): https://www.nuget.org/packages/SignalR.UnitTestingSupport.NUnit, https://www.nuget.org/packages/SignalR.UnitTe...
A library for creating Http servers on the fly in tests and stubbing responses. The verification calls have now moved to HttpMock.Verify.NUnit. Use HttpMock.Logging.Log4Net for logging to the console.
Integration testing framework for developers. TestR allows automating testing of web applications. Adds PowerShell features that are not part of the regular deployment.
Unit testing framework for Sitecore.
Allows creating reliable, flexible and fast VS SDK integration (VSIX) tests that run using any xUnit capable runner, such as Visual Studio built-in Test Explorer or TestDriven.NET.
A library that will help you unit test your Roslyn analyzers. This package contains the default test helpers provided with the Diagnostics + CodeFix solution template but updated for the latest version of Roslyn and with a few enhancements.
Machine.Specifications.AutoMocking attempts to reduce noise in Machine.Specifications (MSpec) tests when creating mock objects, dependencies and the subject under test.
Provides the performance testing classes for TestFirst.Net. See TestFirst.Net docs on performance testing