def test_whenInversingPosition_thenCoordiantesAreInversed(self):
position = Position(X_1, Y_1)
inversed_position = position.inverse()
expected_position = Position(-X_1, -Y_1)
self.assertEqual(expected_position, inversed_position)
def _undo_move(self, element: WorldElementSubclass,
delta_position: Position):
self._move(element.move_by(delta_position), delta_position.inverse())
