code: def test_invalid_image(self):
      import io
  
      im = io.BytesIO(b"")
      with pytest.raises(UnidentifiedImageError):
          with Image.open(im):
              pass
  
imports: import io
  import os
  import shutil
  import sys
  import tempfile
  import pytest
  from PIL import Image, ImageDraw, ImagePalette, UnidentifiedImageError
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar_tofile, assert_not_all_same, hopper, is_win32, mark_if_feature_version, skip_unless_feature
label_desc: Use image node_id 7 for calling the TestImage obj's underlying member method code with example usage: obj.test_invalid_image() without return types