code: def test_arrow(scale):
      surf = pv.Arrow([0, 0, 0], [1, 1, 1], scale=scale)
      assert np.any(surf.points)
      assert np.any(surf.faces)
  
imports: from itertools import permutations
  import re
  import numpy
  import pytest
  import pyvista
label_desc: Use image node_id 3 for calling a global function with example usage: test_arrow(scale) without return types