public void SortByDurationTest()
{
DateTime now = ClockProxy.Clock.Now;
TimePeriodCollection timePeriods = new TimePeriodCollection();
TimeSpan oneHour = new TimeSpan(1, 0, 0);
TimeSpan twoHours = new TimeSpan(2, 0, 0);
TimeSpan threeHours = new TimeSpan(3, 0, 0);
TimeSpan fourHours = new TimeSpan(4, 0, 0);
timePeriods.Add(new TimeRange(now, oneHour));
timePeriods.Add(new TimeRange(now, twoHours));
timePeriods.Add(new TimeRange(now, threeHours));
timePeriods.Add(new TimeRange(now, fourHours));
timePeriods.SortByDuration(ListSortDirection.Descending);
Assert.Equal(fourHours, timePeriods[0].Duration);
Assert.Equal(threeHours, timePeriods[1].Duration);
Assert.Equal(twoHours, timePeriods[2].Duration);
Assert.Equal(oneHour, timePeriods[3].Duration);
timePeriods.SortByDuration();
Assert.Equal(oneHour, timePeriods[0].Duration);
Assert.Equal(twoHours, timePeriods[1].Duration);
Assert.Equal(threeHours, timePeriods[2].Duration);
Assert.Equal(fourHours, timePeriods[3].Duration);
} // SortByDurationTest
