public void GetElement_InputExistingId_SubscribeReturned()
{
int?SubscribeId = 2;
var mock = new Mock <IUnitOfWork>();
mock.Setup(a => a.Subscribs.GetElement(SubscribeId.Value)).Returns(new Subscribe());
var service = new SubscribeService(mock.Object);
var result = service.GetElement(SubscribeId.Value) as SubscribeDTO;
Assert.IsNotNull(result);
}