code: def test_grabclipboard_wl_clipboard(self, ext):
      image_path = "Tests/images/hopper." + ext
      with open(image_path, "rb") as fp:
          subprocess.call(["wl-copy"], stdin=fp)
      im = ImageGrab.grabclipboard()
      assert_image_equal_tofile(im, image_path)
  
file_path: pillow/Tests/test_imagegrab.py
imports: from __future__ import annotations
  import os
  import shutil
  import subprocess
  import sys
  import pytest
  from PIL import Image, ImageGrab
  from .helper import assert_image_equal_tofile, skip_unless_feature
label_desc: Use image node_id 8 for calling the TestImageGrab obj's underlying member method code with example usage: obj.test_grabclipboard_wl_clipboard(ext) without return types