code: def test_invalid_file():
      with open("Tests/images/flower.jpg", "rb") as fp:
          with pytest.raises(SyntaxError):
              DcxImagePlugin.DcxImageFile(fp)
  
file_path: pillow-simd/Tests/test_file_dcx.py
imports: import pytest
  from PIL import DcxImagePlugin, Image
  from .helper import assert_image_equal, hopper, is_pypy
label_desc: Use image node_id 5 for calling a global function with example usage: test_invalid_file() without return types