code: def test_polygons(self):
      t1 = Polygon([(0, 0), (1, 0), (1, 1)])
      t2 = Polygon([(0, 0), (1, 1), (0, 1)])
      sq = Polygon([(0, 0), (1, 0), (1, 1), (0, 1)])
      s = GeoSeries([t1, t2, sq])
      assert s.sindex.size == 3
  
imports: from math import sqrt
  import numpy
  import pandas
  import pytest
  import shapely
  from numpy.testing import assert_array_equal
  from shapely.geometry import GeometryCollection, LineString, MultiPolygon, Point, Polygon, box
  import geopandas
  from geopandas import GeoDataFrame, GeoSeries, read_file
  from geopandas import _compat
label_desc: Use image node_id 5 for calling the TestSeriesSindex obj's underlying member method code with example usage: obj.test_polygons() without return types