code: def test_regression():
      np.random.seed(220)
      img = np.random.random_sample((1024, 1024))
      img *= 255
      img = img.astype(np.uint8)
      features = pftas(img)
      assert not np.any(features == 0.0)
  
file_path: mahotas/mahotas/tests/test_tas.py
imports: import numpy
  from mahotas.features import tas, pftas
  import pytest
label_desc: Use image node_id 3 for calling a global function with example usage: test_regression() without return types