docstr: Test that `fix_arrow_incompatible_column_types` does not
  modify a DataFrame if all columns are compatible with Arrow.
docstr_tok: ["Test","that","`","fix_arrow_incompatible_column_types","`","does","not","modify","a","DataFrame","if","all","columns","are","compatible","with","Arrow","."]
code: def test_fix_no_columns(self):
      """Test that `fix_arrow_incompatible_column_types` does not
      modify a DataFrame if all columns are compatible with Arrow.
      """
  
      df = pd.DataFrame(
          {
              "integer": [1, 2, 3],
              "float": [1.1, 2.2, 3.3],
              "string": ["foo", "bar", None],
              "boolean": [True, False, None],
          }
      )
  
      fixed_df = type_util.fix_arrow_incompatible_column_types(df)
      pd.testing.assert_frame_equal(df, fixed_df)
  
imports: import enum
  import unittest
  from collections import namedtuple
  from datetime import date
  from decimal import Decimal
  from typing import Any
  from unittest.mock import patch
  import numpy
  import pandas
  import plotly.graph_objs
  import pytest
  from pandas.api.types import infer_dtype
  from parameterized import parameterized
  from streamlit import errors, type_util
  from streamlit.errors import StreamlitAPIException
  from tests.streamlit.data_mocks import BASE_TYPES_DF, DATETIME_TYPES_DF, INTERVAL_TYPES_DF, LIST_TYPES_DF, NUMBER_TYPES_DF, PERIOD_TYPES_DF, SHARED_TEST_CASES, SPECIAL_TYPES_DF, UNSUPPORTED_TYPES_DF, TestCaseMetadata, TestObject
  from tests.streamlit.snowpark_mocks import DataFrame
  from tests.streamlit.snowpark_mocks import Row
  from tests.testutil import create_snowpark_session, patch_config_options
label_desc: Use image node_id 21 for calling the TypeUtilTest obj's underlying member method code with example usage: obj.test_fix_no_columns() without return types