public void Given()
 {
     var customerRepository = A.Fake<ICustomerRepository>();
     A.CallTo(() => customerRepository.GetAllCustomers()).Returns(new List<Customer> { new Customer() });
     var emailSender = A.Fake<ISendEmail>();
     A.CallTo(() => emailSender.SendMail()).DoesNothing();
     var sut = new CustomerService(emailSender, customerRepository);
 }
 public void Given()
 {
     var customerRepository = A.Fake<ICustomerRepository>();
     A.CallTo(() => customerRepository.GetAllCustomers()).Returns(new List<Customer> { new Customer() });
     var sut = new CustomerService(A.Fake<ISendEmail>(), customerRepository);
 }