public void can_add_reservation()
{
//arrange
NewReservationItem newRes = new NewReservationItem
{
From = DateTime.Now,
To = DateTime.Now.AddDays(10),
LectureHallNumber = 101,
LecturerId = 1
};
IReservationsService service = new ReservationsService(_database);
//add a new reservation
service.SaveReservation(newRes);
var reservations = _database.Reservations;
//assert
Assert.IsTrue(reservations.Count == 2);
}