code: def test_unary_union(self):
      patches = [Point(xy).buffer(0.05) for xy in self.coords]
      u = unary_union(patches)
      assert u.geom_type == "MultiPolygon"
      assert u.area == pytest.approx(0.718572540569)
  
file_path: shapely/shapely/tests/legacy/test_union.py
imports: import random
  import unittest
  from functools import partial
  from itertools import islice
  import pytest
  from shapely.errors import ShapelyDeprecationWarning
  from shapely.geometry import MultiPolygon, Point
  from shapely.ops import cascaded_union, unary_union
label_desc: Use image node_id 3 for calling the UnionTestCase obj's underlying member method code with example usage: obj.test_unary_union() without return types