public void Test_durins_day_2024()
        {
            var year = 2024;

            var calc = new DurinsDayCalculator();

            var durinsDay = calc.DurinsDay(year);

            Assert.True(durinsDay.Year == year);
        }
        public void Test_durins_day_this_year()
        {
            var year = DateTime.Today.Year;

            var calc = new DurinsDayCalculator();

            var durinsDay = calc.DurinsDay(year);

            Assert.True(durinsDay.Year == year);
        }
        public void Can_generate_100_years_of_durins_days()
        {
            var year = DateTime.Today.Year;
            var calc = new DurinsDayCalculator();

            for (int i = 0; i < 100; i++, year++)
            {
                var durinsDay = calc.DurinsDay(year);

                Assert.NotEqual(durinsDay, default(DateTime));

                Assert.Equal(year, durinsDay.Year);

                Assert.Equal(durinsDay.Month, 10);
            }
        }