code: def test_show_surf():
      np.random.seed(22)
      f = np.random.rand(256, 256) * 230
      f = f.astype(np.uint8)
      spoints = surf.surf(f, 6, 24, 1)
      f2 = surf.show_surf(f, spoints)
      assert f2.shape == (f.shape + (3,))
  
file_path: mahotas/mahotas/tests/test_surf.py
imports: import numpy
  import mahotas
  import mahotas.features.surf
  from mahotas.features import _surf
  from .utils import luispedro_jpg
  import pytest
label_desc: Use image node_id 7 for calling a global function with example usage: test_show_surf() without return types