code: def test_unique():
      s = GeoSeries([Point(0, 0), Point(0, 0), Point(2, 2)])
      exp = from_shapely([Point(0, 0), Point(2, 2)])
      # TODO should have specialized GeometryArray assert method
      assert_array_equal(s.unique(), exp)
  
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 30 for calling a global function with example usage: test_unique() without return types