code: def test_encode(self):
      encoder = ImageFile.PyEncoder(None)
      with pytest.raises(NotImplementedError):
          encoder.encode(None)
  
      bytes_consumed, errcode = encoder.encode_to_pyfd()
      assert bytes_consumed == 0
      assert ImageFile.ERRORS[errcode] == "bad configuration"
  
      encoder._pushes_fd = True
      with pytest.raises(NotImplementedError):
          encoder.encode_to_pyfd()
  
      with pytest.raises(NotImplementedError):
          encoder.encode_to_file(None, None)
  
imports: from __future__ import annotations
  from io import BytesIO
  import pytest
  from PIL import BmpImagePlugin, EpsImagePlugin, Image, ImageFile, UnidentifiedImageError, _binary, features
  from .helper import assert_image, assert_image_equal, assert_image_similar, fromstring, hopper, skip_unless_feature, tostring
label_desc: Use image node_id 5 for calling the TestPyEncoder obj's underlying member method code with example usage: obj.test_encode() without return types