A good place to start is verifying that the system is fully integrated; let's first test that the repository can access the database. Create a folder within the integration test project called RepositoryTests and create a new test file called GetAll. This will be where the integration tests for the GetAll method of the repository will be created.

You could create a test that verifies that the repository can be created, like so:

[Fact]
public void ItExists()
{
  var options = new DbContextOptions<SpeakerMeetContext>();
  var context = new SpeakerMeetContext(options);

  var repository = new Repository.Repository<Speaker>(context);
}

However, that's not going to pass. If you run the test you will receive the following error:

System.InvalidOperationException: No database provider has been configured for this DbContext.

This is easily fixed by configuring an appropriate provider.