code: def test_bbox():
      def check(im, fill_color):
          assert im.getbbox() is None
  
          im.paste(fill_color, (10, 25, 90, 75))
          assert im.getbbox() == (10, 25, 90, 75)
  
          im.paste(fill_color, (25, 10, 75, 90))
          assert im.getbbox() == (10, 10, 90, 90)
  
          im.paste(fill_color, (-10, -10, 110, 110))
          assert im.getbbox() == (0, 0, 100, 100)
  
      # 8-bit mode
      im = Image.new("L", (100, 100), 0)
      check(im, 255)
  
      # 32-bit mode
      im = Image.new("RGB", (100, 100), 0)
      check(im, 255)
  
      for mode in ("RGBA", "RGBa"):
          for color in (
              (0, 0, 0, 0),
              (127, 127, 127, 0),
              (255, 255, 255, 0),
          ):
              im = Image.new(mode, (100, 100), color)
              check(im, (255, 255, 255, 255))
  
      for mode in ("La", "LA", "PA"):
          for color in ((0, 0), (127, 0), (255, 0)):
              im = Image.new(mode, (100, 100), color)
              check(im, (255, 255))
  
imports: from __future__ import annotations
  import pytest
  from PIL import Image
  from .helper import hopper
label_desc: Use image node_id 2 for calling a global function with example usage: test_bbox() without return types