public void ContainsPeriodTest()
{
DateTime now = ClockProxy.Clock.Now;
SchoolDay schoolDay = new SchoolDay( now );
TimePeriodCollection timePeriods = new TimePeriodCollection( schoolDay );
TimeRange timeRange = new TimeRange( schoolDay.Lesson1.Start, schoolDay.Lesson1.End );
Assert.IsFalse( timePeriods.Contains( timeRange ) );
Assert.IsTrue( timePeriods.ContainsPeriod( timeRange ) );
timePeriods.Add( timeRange );
Assert.IsTrue( timePeriods.Contains( timeRange ) );
Assert.IsTrue( timePeriods.ContainsPeriod( timeRange ) );
}