bUnit 

bUnit.core is the base library that provides support for testing Blazor components. You need to install bUnit.web as well to test web-based Blazor components.

bUnit.web is the web specific parts of bUnit, that enables you to easily test and verify the output of Blazor (web) component.

bUnit is a testing library for Blazor components. You can easily define components under test in C# or Razor syntax and verify outcome using semantic HTML diffing/comparison logic. You can interact with and inspect the component under test, trigger event handlers, provide cascading values,... More information

bUnit.xunit is an xUnit extension for bUnit, that provides a way for xUnit to run bUnit's razor-based tests, as well as other helpful extensions to make the testing experience better if you use xUnit for writing your tests.

bUnit.web.testcomponents enables writing tests using the <Fixture> and <SnapshotTest> components in .razor files. This package only works with xUnit. NOTE: This package represents experimental features of bUnit that has been superseded by better ones. It is provided to avoid breaking existing test... More information

A project template for a testing Blazor/Razor components using the bUnit library.

bUnit.web.mock contains an experimental component stubbing mocking library. This library is in preview, and the logic will likely be added back into bUnit when out of preview.