code: def test_coverage_union_reduce_1dim(n):
      """
      This is tested seperately from other set operations as it expects only
      non-overlapping polygons
      """
      test_data = [
          shapely.box(0, 0, 1, 1),
          shapely.box(1, 0, 2, 1),
          shapely.box(2, 0, 3, 1),
      ]
      actual = shapely.coverage_union_all(test_data[:n])
      # perform the reduction in a python loop and compare
      expected = test_data[0]
      for i in range(1, n):
          expected = shapely.coverage_union(expected, test_data[i])
      assert_geometries_equal(actual, expected, normalize=True)
  
imports: import numpy
  import pytest
  import shapely
  from shapely import Geometry, GeometryCollection, Polygon
  from shapely.errors import UnsupportedGEOSVersionError
  from shapely.testing import assert_geometries_equal
  from shapely.tests.common import all_types, empty, ignore_invalid, point, polygon
label_desc: Use image node_id 22 for calling a global function with example usage: test_coverage_union_reduce_1dim(n) without return types