def test_position_with_no_params_corresponds_to_origin(self):
position = Position()
self.assertEqual(0,position.x())
self.assertEqual(0, position.y())
def test_position_can_be_created_with_x_and_y_params(self):
position = Position(2,3)
self.assertEqual(2, position.x())
self.assertEqual(3, position.y())