public void GetIntersectionTest()
{
TimeBlock readOnlyTimeBlock = new TimeBlock(start, duration);
Assert.Equal(readOnlyTimeBlock.GetIntersection(readOnlyTimeBlock), new TimeBlock(readOnlyTimeBlock));
TimeBlock timeBlock = new TimeBlock(start, duration);
// before
ITimeBlock before1 = timeBlock.GetIntersection(new TimeBlock(start.AddHours(-2), start.AddHours(-1)));
Assert.Null(before1);
ITimeBlock before2 = timeBlock.GetIntersection(new TimeBlock(start.AddMilliseconds(-1), start));
Assert.Equal(before2, new TimeBlock(start));
ITimeBlock before3 = timeBlock.GetIntersection(new TimeBlock(start.AddMilliseconds(-1), start.AddMilliseconds(1)));
Assert.Equal(before3, new TimeBlock(start, start.AddMilliseconds(1)));
// after
ITimeBlock after1 = timeBlock.GetIntersection(new TimeBlock(end.AddHours(1), end.AddHours(2)));
Assert.Null(after1);
ITimeBlock after2 = timeBlock.GetIntersection(new TimeBlock(end, end.AddMilliseconds(1)));
Assert.Equal(after2, new TimeBlock(end));
ITimeBlock after3 = timeBlock.GetIntersection(new TimeBlock(end.AddMilliseconds(-1), end.AddMilliseconds(1)));
Assert.Equal(after3, new TimeBlock(end.AddMilliseconds(-1), end));
// intersect
Assert.Equal(timeBlock.GetIntersection(timeBlock), timeBlock);
ITimeBlock itersect1 = timeBlock.GetIntersection(new TimeBlock(start.AddMilliseconds(-1), end.AddMilliseconds(1)));
Assert.Equal(itersect1, timeBlock);
ITimeBlock itersect2 = timeBlock.GetIntersection(new TimeBlock(start.AddMilliseconds(1), end.AddMilliseconds(-1)));
Assert.Equal(itersect2, new TimeBlock(start.AddMilliseconds(1), end.AddMilliseconds(-1)));
} // GetIntersectionTest
