code: def test_global_boundary(self):
      linear_ring = sgeom.LineString(
          [(-180, -180), (-180, 180), (180, 180), (180, -180)]
      )
      pc = ccrs.PlateCarree()
      merc = ccrs.Mercator()
      multi_line_string = pc.project_geometry(linear_ring, merc)
      assert len(multi_line_string.geoms) > 0
  
      # check the identity transform
      multi_line_string = merc.project_geometry(linear_ring, merc)
      assert len(multi_line_string.geoms) > 0
  
imports: import itertools
  import time
  import numpy
  import pytest
  import shapely.geometry
  import cartopy.crs
label_desc: Use image node_id 3 for calling the TestMisc obj's underlying member method code with example usage: obj.test_global_boundary() without return types