This tutorial is all about coverage. My theory is that all code written should be covered. The reason: you'll have at least 1 test for all lines, and 100% is an easier stat to check for than 80%+.
The tutorial in it's present state has very basic examples. This is so the concepts shown can have more impact than the code itself.
We will be testing a simple [class] (https://github.com/clintcparker/c_sharp_testing/blob/master/FakesTesting/BadIdea.cs) with public and private methods (one of each), that is dependent on the System.Net.Http dll and an external website.
Let's take a look the class to be tested: [Bad Idea] (BadIdea)
[Next Page] (BadIdea)