code: def test_grab_invalid_xdisplay(self):
      with pytest.raises(OSError) as e:
          ImageGrab.grab(xdisplay="error.test:0.0")
      assert str(e.value).startswith("X connection failed")
  
file_path: pillow-simd/Tests/test_imagegrab.py
imports: import os
  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 4 for calling the TestImageGrab obj's underlying member method code with example usage: obj.test_grab_invalid_xdisplay() without return types