public void SupportsAddingAndRemovingEntities()
{
var map = new Map2D <float>(16, 16);
var oldBoot = new Entity {
Name = "Old Boot"
};
map.PutEntity(1, 1, oldBoot);
Assert.That(map.GetEntitiesAt(1, 1).Any());
Assert.That(oldBoot.X == 1 && oldBoot.Y == 1);
map.RemoveEntity(oldBoot);
Assert.That(map.GetEntitiesAt(1, 1).Any() == false);
// After removing, items have null coordinates.
Assert.That(oldBoot.X == null);
Assert.That(oldBoot.Y == null);
Assert.That(oldBoot.Z == null);
}