bUnit is a testing library for Blazor Components. Its goal is to make it easy to write comprehensive, stable unit tests. With bUnit, you can:

• Setup and define components under tests using C# or Razor syntax
• Verify outcomes using semantic HTML comparer
• Interact with and inspect components as well as trigger event handlers
• Pass parameters, cascading values and inject services into components under test
• Mock IJSRuntime, Blazor authentication and authorization, and others

bUnit builds on top of existing unit testing frameworks such as xUnit, NUnit, MSTest and TUnit, which run the Blazor component tests in just the same way as any normal unit test. bUnit runs a test in milliseconds, compared to browser-based UI tests which usually take seconds to run.

Go to bUnit.dev to learn more.

bUnit is available on NuGet in various incarnations. Most should just pick the bUnit package:

Name	Description	NuGet Download Link
bUnit	Adds support for testing Blazor components.
bUnit.template	Template, which currently creates xUnit-based bUnit test projects only.
bUnit.generators	Source code generators to minimize code setup in various situations.
bUnit.web.query	bUnit implementation of testing-library.com's query APIs.

To get started, head to the getting started documentation to learn more.

For a migration guide, see Upgrading bUnit.

A huge thank you to the sponsors of bUnit. The higher tier sponsors are:

LambdaTest

Shout outs and a big thank you to all the contributors to the library, including those that raise issues, provide input to issues, and those who send pull requests. Thank you!

These good people have contributed code or documentation to bUnit:

This project has adopted the code of conduct defined by the Contributor Covenant to clarify expected behavior in our community. For more information see the .NET Foundation Code of Conduct.

This project is supported by the .NET Foundation.