This video from Patrick God has a great direct introduction to bUnit Testing in setting up the Visual Project and setting up bUnit tests with and without parameters which is a key part of unit testing using this framework.
On the screenshot here you can see the Parameter being set for the Value = 1 using Lambda expressions which can using in the new method, this is very useful!
GitHub is on https://github.com/patrickgod/BlazorUnitTestingTutorial.
The video is on here.