code: def test_pickle_font_string(protocol):
      # Arrange
      font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
  
      # Act: roundtrip
      pickled_font = pickle.dumps(font, protocol)
      unpickled_font = pickle.loads(pickled_font)
  
      # Assert
      helper_assert_pickled_font_images(font, unpickled_font)
  
file_path: pillow-simd/Tests/test_pickle.py
imports: import pickle
  import pytest
  from PIL import Image, ImageDraw, ImageFont
  from .helper import assert_image_equal, skip_unless_feature
label_desc: Use image node_id 7 for calling a global function with example usage: test_pickle_font_string(protocol) without return types