public void GetByIdTest()
{
var id = new Guid();
Subscriber subscriber = new Subscriber()
{
Id = id
};
var unit = new MockUnitOfWork();
unit.MockRepository();
unit.MockGetForRep(subscriber);
var service = new SubscriberService(unit.Object);
var res = service.GetById(id).GetAwaiter().GetResult();
Assert.NotNull(res);
Assert.Equal(id, subscriber.Id);
Assert.IsAssignableFrom <Subscriber>(res);
}