code: def test_sphere_direction_points(expected):
      # from south pole to north pole
      north_pole = pv.Sphere(
          direction=expected, start_phi=0, end_phi=0
      ).points[0]
      south_pole = pv.Sphere(
          direction=expected, start_phi=180, end_phi=180
      ).points[0]
      actual = north_pole - south_pole
      assert np.array_equal(expected, actual)
  
imports: from itertools import permutations
  import re
  import numpy
  import pytest
  import pyvista
label_desc: Use image node_id 6 for calling a global function with example usage: test_sphere_direction_points(expected) without return types