class_docstr: Test ability to marshall arrow protos.
class_docstr_tok: ["Test","ability","to","marshall","arrow","protos","."]
docstr: Test that an empty column_order is correctly added.
docstr_tok: ["Test","that","an","empty","column_order","is","correctly","added","."]
code: def test_empty_column_order_parameter(self):
      """Test that an empty column_order is correctly added."""
      st.dataframe(pd.DataFrame(), column_order=[])
  
      proto = self.get_delta_from_queue().new_element.arrow_data_frame
      self.assertEqual(proto.column_order, [])
  
imports: import json
  from unittest.mock import MagicMock, patch
  import numpy
  import pandas
  import pyarrow
  import pytest
  from pandas.io.formats.style_render import StylerRenderer
  import streamlit
  from streamlit.elements.lib.column_config_utils import INDEX_IDENTIFIER
  from streamlit.errors import StreamlitAPIException
  from streamlit.type_util import bytes_to_data_frame, pyarrow_table_to_bytes
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
  from tests.testutil import create_snowpark_session
label_desc: Use image node_id 3 for calling the ArrowDataFrameProtoTest obj's underlying member method code with example usage: obj.test_empty_column_order_parameter() without return types