public void GetAllFilterByDate_Test()
        {
            // Arrange
            TestKolgraphEntities context = new TestKolgraphEntities();
            var repository = new AppointmentRepository(context);
            int year       = 2019;
            int month      = 7;
            int day        = 7;

            // Act
            IEnumerable <appointment> result = repository.GetAllFilterByDate(year, month, day);

            // Assert
            Assert.AreEqual(context.appointment.Where(x => x.dateTime.Year == year && x.dateTime.Month == month && x.dateTime.Day == day).Count(), result.Count());
        }