code: def test_bad_mode():
      with pytest.raises(ValueError):
          GdImageFile.open(TEST_GD_FILE, "bad mode")
  
imports: from __future__ import annotations
  import pytest
  from PIL import GdImageFile, UnidentifiedImageError
label_desc: Use image node_id 2 for calling a global function with example usage: test_bad_mode() without return types