public void DaysBeforeMakesSense()
{
DateTimeRange range = new DateTimeRange(new DateTime(2019, 5, 1, 12, 1, 1), new DateTime(2019, 5, 7, 14, 1, 1));
List <DateTime> days = range.DaysBefore(new DateTime(2019, 5, 3));
Assert.AreEqual(days.Count, 2);
Assert.AreEqual(days[0].Ticks, (new DateTime(2019, 5, 1)).Ticks);
Assert.AreEqual(days[1].Ticks, (new DateTime(2019, 5, 2)).Ticks);
range = new DateTimeRange(new DateTime(2019, 5, 4, 12, 1, 1), new DateTime(2019, 5, 7, 14, 1, 1));
days = range.DaysBefore(new DateTime(2019, 5, 3));
Assert.AreEqual(days.Count, 0);
range = new DateTimeRange(new DateTime(2019, 5, 3), new DateTime(2019, 5, 7, 14, 1, 1));
days = range.DaysBefore(new DateTime(2019, 5, 3));
Assert.AreEqual(days.Count, 0);
}