public void CheckValidator_ShouldFailIfEndDateTimeIsGreaterThenStartDateTime()
        {
            var checkBooking   = new CheckValidator();
            var bookingDetails = new CheckBookingDto
            {
                StartDateTime = new DateTime(2018, 08, 22, 12, 00, 00),
                EndDateTime   = new DateTime(2018, 08, 22, 11, 00, 00)
            };

            checkBooking.ShouldHaveValidationErrorFor(e => e.EndDateTime, bookingDetails);
        }
        public void BookingValidator_ShouldFailIfEndDateTimeIsEmpty()
        {
            var checkBooking = new CheckValidator();

            checkBooking.ShouldHaveValidationErrorFor(e => e.EndDateTime, default(DateTime));
        }