public void DistanceSquaredTest()
{
GridPosition origin = new GridPosition(0, 0, 0);
GridPosition v1 = new GridPosition(2, 2, 2);
GridPosition v2 = new GridPosition(-2, -2, -2);
GridPosition v3 = new GridPosition(4, -3, 5);
Assert.AreEqual(12, GridPosition.DistanceSquared(v1, origin), "#1");
Assert.AreEqual(12, GridPosition.DistanceSquared(v2, origin), "#2");
Assert.AreEqual(50, GridPosition.DistanceSquared(v3, origin), "#3");
Assert.AreEqual(GridPosition.DistanceSquared(v1, origin),
GridPosition.DistanceSquared(v2, origin), "#4");
Assert.AreEqual(GridPosition.DistanceSquared(v3, origin),
GridPosition.DistanceSquared(origin, v3), "#5");
Assert.AreEqual(12, GridPosition.DistanceSquared(origin, v1), "#6");
Assert.AreEqual(12, GridPosition.DistanceSquared(origin, v2), "#7");
Assert.AreEqual(50, GridPosition.DistanceSquared(origin, v3), "#8");
Assert.AreEqual(3, GridPosition.DistanceSquared(origin, GridPosition.One), "#9");
Assert.AreEqual(0, GridPosition.DistanceSquared(v3, v3), "#10");
}