public void Is_Less_Than_18_And_Does_Not_Get_Email()
{
var mockCustomer = new Mock <ICustomer>();
mockCustomer.SetupAllProperties();
var mockValidator = new Mock <ICustomerValidator>();
mockValidator.Setup(p => p.ValidateCustomer(mockCustomer.Object)).Returns(false);
var mockSender = new Mock <INotificationSender>();
WorkflowManager manager = new WorkflowManager(mockValidator.Object, mockSender.Object);
manager.AddCustomer(mockCustomer.Object);
mockValidator.Verify(p => p.ValidateCustomer(mockCustomer.Object), Times.Once);
mockCustomer.VerifySet(p => p.Valid = false);
mockCustomer.VerifyGet(p => p.Valid, Times.AtLeastOnce);
mockSender.Verify(p => p.Send(mockCustomer.Object), Times.Never);
}