code: def test_invalid_file():
      # Arrange
      invalid_file = "Tests/images/flower.jpg"
  
      # Act / Assert
      with pytest.raises(SyntaxError):
          XVThumbImagePlugin.XVThumbImageFile(invalid_file)
  
imports: import pytest
  from PIL import Image, XVThumbImagePlugin
  from .helper import assert_image_similar, hopper
label_desc: Use image node_id 3 for calling a global function with example usage: test_invalid_file() without return types