public void TestHas16HolidaysIn2017()
        {
            var holidayCalendar = new KazakhstanPublicHoliday();
            var actual          = holidayCalendar.PublicHolidays(2017).Count;

            Assert.AreEqual(16, actual);
        }
        public void TestHolidays2017(int month, int day)
        {
            var holiday         = new DateTime(2017, month, day);
            var holidayCalendar = new KazakhstanPublicHoliday();
            var actual          = holidayCalendar.IsPublicHoliday(holiday);

            Assert.AreEqual(true, actual, $"{holiday.ToString("D")} is not a holiday");
        }