code: def test_apply(s):
      # function that returns geometry preserves GeoSeries class
      def geom_func(geom):
          assert isinstance(geom, Point)
          return geom
  
      result = s.apply(geom_func)
      assert isinstance(result, GeoSeries)
      assert_geoseries_equal(result, s)
  
      # function that returns non-geometry results in Series
      def numeric_func(geom):
          assert isinstance(geom, Point)
          return geom.x
  
      result = s.apply(numeric_func)
      assert not isinstance(result, GeoSeries)
      assert_series_equal(result, pd.Series([0.0, 1.0, 2.0]))
  
imports: import os
  from packaging.version import Version
  import warnings
  import numpy
  from numpy.testing import assert_array_equal
  import pandas
  import shapely
  from shapely.geometry import Point, GeometryCollection, LineString, LinearRing
  import geopandas
  from geopandas import GeoDataFrame, GeoSeries
  import geopandas._compat
  from geopandas.array import from_shapely
  from geopandas.testing import assert_geodataframe_equal, assert_geoseries_equal
  from pandas.testing import assert_frame_equal, assert_series_equal
  import pytest
label_desc: Use image node_id 38 for calling a global function with example usage: test_apply(s) and returns: geom, geom