public void Add_Subscriber_To_Db()
{
var mockDbSet = new Mock <DbSet <Subscriber> >();
var mockContext = new Mock <RentalContext>();
mockContext.Setup(r => r.Subscribers).Returns(mockDbSet.Object);
var service = new SubscriberService(mockContext.Object);
service.Add(new Subscriber());
mockContext.Verify(a => a.Add(It.IsAny <Subscriber>()), Times.Once);
mockContext.Verify(s => s.SaveChanges(), Times.Once);
}
