public void ContainsTest()
{
SchoolDay schoolDay = new SchoolDay();
Assert.False(schoolDay.Contains(new TimeRange()));
Assert.False(schoolDay.Contains(new TimeBlock()));
Assert.True(schoolDay.Contains(schoolDay.Lesson1));
Assert.True(schoolDay.Contains(schoolDay.Break1));
Assert.True(schoolDay.Contains(schoolDay.Lesson2));
Assert.True(schoolDay.Contains(schoolDay.Break2));
Assert.True(schoolDay.Contains(schoolDay.Lesson3));
Assert.True(schoolDay.Contains(schoolDay.Break3));
Assert.True(schoolDay.Contains(schoolDay.Lesson4));
schoolDay.Remove(schoolDay.Lesson1);
Assert.False(schoolDay.Contains(schoolDay.Lesson1));
} // ContainsTest
