public void CalculateCharge_Sameday_2hours()
        {
            var visit = new ShortVisit(
                new DateTime(2021, 3, 15, 8, 0, 0),
                new DateTime(2021, 3, 15, 10, 0, 0));

            Assert.AreEqual(visit.CalculateCharge(), 2.20);
        }
        public void CalculateCharge_ThursdaySaturday_Equals1228()
        {
            var visit = new ShortVisit(
                new DateTime(2017, 9, 7, 16, 50, 0),
                new DateTime(2017, 9, 9, 19, 15, 0));

            Assert.AreEqual(visit.CalculateCharge(), 12.28);
        }
        public void CalculateCharge_OutwithChargePeriod_EqualsZero()
        {
            var visit = new ShortVisit(
                new DateTime(2021, 3, 12, 18, 0, 1),
                new DateTime(2021, 3, 15, 7, 59, 59));

            Assert.AreEqual(visit.CalculateCharge(), 0);
        }