code: def test_dense_scale():
      im = luispedro_jpg(True)
      surf.dense(im, spacing=32)
      s5 = surf.dense(im, spacing=32, scale=5)
      s51 = surf.dense(im, spacing=32, scale=5.1)
      assert not np.all(s5 == s51)
  
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 14 for calling a global function with example usage: test_dense_scale() without return types