Organizing unit tests with a base service class

We can better organize our tests by creating an abstract class. This abstract class establishes a framework for mocking our repositories, services, or anything else we need to share among tests. This pattern can work well with either a test fixture or a series of independent tests.

Getting ready

You can download the starter project here: https://github.com/PacktPublishing/ASP.NET-9-Web-API-Cookbook/tree/main/start/chapter07/UnitTests3.

You can also continue from the preceding recipe.

How to do it…

1. Create a new file called BookServiceTestsBase.cs. Import the namespaces for our API services and repositories as well as the NSubstitute library:

   using Books.Repositories;
   using Books.Services;
   using NSubstitute;
   namespace Tests.Services;

2. Implement protected properties to hold Service and Repository:

   public abstract class BooksServiceTestsBase
   {
       protected IBooksRepository Repository { get;...