code: def test_levi_output(common_minima2):
      """Test levi function output."""
      assert np.isclose(fx.levi(common_minima2), np.zeros(3)).all()
  
imports: from collections import namedtuple
  import numpy
  import pytest
  from pyswarms.utils.functions import single_obj
label_desc: Use image node_id 11 for calling a global function with example usage: test_levi_output(common_minima2) without return types