public void date_time_range_enumerable_enumerates_6_hour_intervals()
        {
            var startDate = DateTime.SpecifyKind(new DateTime(2010, 02, 09), DateTimeKind.Utc);
            var endDate = DateTime.SpecifyKind(new DateTime(2010, 02, 10), DateTimeKind.Utc);
            var ob = new DateRange(startDate, endDate); // exclude end date

            var expected = (endDate - startDate).Days * 4; // we exclude the last day as well

            var actual = ob.GetEnumerable(TimeSpan.FromHours(6)).Count();

            Assert.That(actual, Is.EqualTo(expected));
        }