code: def test_invalid_file(self):
      invalid_file = "Tests/images/flower.jpg"
  
      with pytest.raises(SyntaxError):
          PngImagePlugin.PngImageFile(invalid_file)
  
imports: from __future__ import annotations
  import re
  import sys
  import warnings
  import zlib
  from io import BytesIO
  import pytest
  from PIL import Image, ImageFile, PngImagePlugin, features
  from .helper import PillowLeakTestCase, assert_image, assert_image_equal, assert_image_equal_tofile, hopper, is_win32, mark_if_feature_version, skip_unless_feature
label_desc: Use image node_id 3 for calling the TestFilePng obj's underlying member method code with example usage: obj.test_invalid_file() without return types