code: def test_border():
      canvas = np.zeros((32, 32))
      polygon = np.array([(0, 0), (0, 32), (32, 0)])
      fill_polygon(polygon, canvas)
      assert not np.all(canvas)
  
file_path: mahotas/mahotas/tests/test_polygon.py
imports: import numpy
  import mahotas
  import mahotas.polygon
  from mahotas.polygon import fill_polygon, fill_convexhull
  import pytest
label_desc: Use image node_id 9 for calling a global function with example usage: test_border() without return types