public void TestNull()
{
string nullString = null;
Insist.IsNull(null);
Insist.IsNull(nullString);
Insist.IsNull(new DateTime?());
Insist.IsNull(new int?());
Insist.IsNull(null);
Assert.Throws <ValueNotNullException>(() => Insist.IsNull(32));
Assert.Throws <ValueNotNullException>(() => Insist.IsNull(DateTime.Today));
Assert.Throws <ValueNotNullException>(() => Insist.IsNull("string"));
Assert.Throws <ValueNotNullException>(() => Insist.IsNull(new object()));
}
/// <summary>
/// Insert an item into this QuadTree object.
/// </summary>
/// <param name="item">The item to insert.</param>
internal void Insert(QuadTreeObject <T> item)
{
// If this quad doesn't contain the items rectangle, do nothing, unless we are the root
if (!_rect.Contains(item.Data.Bounds))
{
Insist.IsNull(_parent, "We are not the root, and this object doesn't fit here. How did we get here?");
if (_parent == null)
{
// This object is outside of the QuadTree bounds, we should add it at the root level
Add(item);
}
else
{
return;
}
}
if (_objects == null || (_childTL == null && _objects.Count + 1 <= maxObjectsPerNode))
{
// If there's room to add the object, just add it
Add(item);
}
else
{
// No quads, create them and bump objects down where appropriate
if (_childTL == null)
{
Subdivide();
}
// Find out which tree this object should go in and add it there
var destTree = GetDestinationTree(item);
if (destTree == this)
{
Add(item);
}
else
{
destTree.Insert(item);
}
}
}