code: def test_polygon_is_square(list_out):
      """The polygon is the unit square"""
  
      list_poly = Polygon(list_out["coordinates"][0])
      assert list_poly.area == 1
      assert list_poly.length == 4
  
file_path: earthpy/earthpy/tests/test_extent_to_json.py
imports: import pandas
  import pytest
  import geopandas
  from shapely.geometry import Polygon, Point
  import earthpy.spatial
label_desc: Use image node_id 4 for calling a global function with example usage: test_polygon_is_square(list_out) without return types