SuccessfulCustomerRegTests.cs

[Fact]
public async Task ShouldRegisterCustomerIfNotAlreadyRegistered()
{
	var customerRepositoryStub = CreateEmptyRepository();
	
	var testCustomerRegistrationRequest = new CustomerRegistrationRequest(
		email: "customer@gmail.com", 
		dateOfBirth: new DateTime(1975, 2, 21), 
		firstName: "Joe", 
		lastName: "Bloggs");		
	
	// Create the system under test with a stub and a dummy	
	var useCase = new CustomerRegistrationUseCase(
		customerRepositoryStub, 
		new Mock<IEventBus>().Object);
		
	await useCase.RegisterCustomer(testCustomerRegistrationRequest);
	
	var registeredCustomer = await customerRepositoryStub.GetByEmail(
		testCustomerRegistrationRequest.Email);
		
	registeredCustomer.Should().NotBeNull();
	registeredCustomer.DateOfBirth.Should().Be(testCustomerRegistrationRequest.DateOfBirth);
	registeredCustomer.FirstName.Should().Be(testCustomerRegistrationRequest.FirstName);
	registeredCustomer.LastName.Should().Be(testCustomerRegistrationRequest.LastName);	
}