code: def test_default_geo_col_writes(tmp_path):
      # edge case geo col name None writes successfully
      df = GeoDataFrame({"a": [1, 2]})
      df.to_parquet(tmp_path / "test.pq")
      # cannot be round tripped as gdf due to invalid geom col
      pq_df = pd_read_parquet(tmp_path / "test.pq")
      assert_frame_equal(df, pq_df)
  
imports: from __future__ import absolute_import
  from itertools import product
  import json
  from packaging.version import Version
  import os
  import pathlib
  import pytest
  from pandas import DataFrame, read_parquet
  from pandas.testing import assert_frame_equal
  import numpy
  import pyproj
  from shapely.geometry import box, Point, MultiPolygon
  import geopandas
  from geopandas import GeoDataFrame, read_file, read_parquet, read_feather
  from geopandas.array import to_wkb
  from geopandas.io.arrow import SUPPORTED_VERSIONS, _create_metadata, _decode_metadata, _encode_metadata, _geopandas_to_arrow, _get_filesystem_path, _remove_id_from_member_of_ensembles, _validate_dataframe, _validate_metadata, METADATA_VERSION
  from geopandas.testing import assert_geodataframe_equal, assert_geoseries_equal
  from geopandas.tests.util import mock
label_desc: Use image node_id 27 for calling a global function with example usage: test_default_geo_col_writes(tmp_path) without return types