def test_cannot_move_to_same_position(self):
b = Board("my board")
b.AddPiece((0,0), "a")
b.AddPiece((10,10), "b")
self.assertFalse(b.IsValidMove((0,0), (0,0)))
def test_cannot_move_empty_position(self):
b = Board("my board")
self.assertFalse(b.IsValidMove((0,0), (1,1)))
