public void DaysBetweenDates_1()
        {
            var solution = new _1360_NumberOfDaysBetweenTwoDates();
            var result   = solution.DaysBetweenDates("2019-06-29", "2019-06-30");

            Assert.AreEqual(1, result);
        }
        public void DaysBetweenDates_2()
        {
            var solution = new _1360_NumberOfDaysBetweenTwoDates();
            var result   = solution.DaysBetweenDates("2020-01-15", "2019-12-31");

            Assert.AreEqual(15, result);
        }