Moving on to the business layer, you should verify that each service can retrieve data from the InMemory database through the repository.

First, create a new folder in the integration test project called ServiceTests. Within that folder, create a folder named SpeakerServiceTests. This folder is where the tests specific to the SpeakerService will be created.

Create a new test file named GetAll. Add a test method to verify that the service can be created:

[Fact]
public void ItExists()
{
  var options = new DbContextOptionsBuilder<SpeakerMeetContext>()
      .UseInMemoryDatabase("SpeakerMeetInMemory")
      .Options;

  var context = new SpeakerMeetContext(options);

  var repository = new Repository<Speaker>(context);
  var gravatarService = new GravatarService();

  var speakerService = new SpeakerService(repository, gravatarService);
}