code: def test_thumbnail():
      # Issue #619
      # Arrange
      files = [FILE1, FILE2]
      for fn in files:
          with Image.open(FILE1) as im:
              new_size = (100, 100)
              im.thumbnail(new_size)
              assert max(im.size) == max(new_size)
  
imports: import io
  import pytest
  from PIL import EpsImagePlugin, Image, features
  from .helper import assert_image_similar, assert_image_similar_tofile, hopper, mark_if_feature_version, skip_unless_feature
label_desc: Use image node_id 13 for calling a global function with example usage: test_thumbnail() without return types