code: def test_effect_spread_zero(self):
      # Arrange
      im = hopper()
      distance = 0
  
      # Act
      im2 = im.effect_spread(distance)
  
      # Assert
      assert_image_equal(im, im2)
  
imports: import io
  import os
  import shutil
  import sys
  import tempfile
  import pytest
  from PIL import Image, ImageDraw, ImagePalette, UnidentifiedImageError
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar_tofile, assert_not_all_same, hopper, is_win32, mark_if_feature_version, skip_unless_feature
label_desc: Use image node_id 33 for calling the TestImage obj's underlying member method code with example usage: obj.test_effect_spread_zero() without return types