code: def test_wms():
      ax = plt.axes(projection=ccrs.Orthographic())
      url = "http://vmap0.tiles.osgeo.org/wms/vmap0"
      layer = "basic"
      ax.add_wms(url, layer)
      return ax.figure
  
file_path: cartopy/lib/cartopy/tests/mpl/test_web_services.py
imports: import matplotlib.pyplot
  import pytest
  from cartopy.tests.conftest import _HAS_PYKDTREE_OR_SCIPY
  import cartopy.crs
  from cartopy.io.ogc_clients import _OWSLIB_AVAILABLE
label_desc: Use image node_id 3 for calling a global function with example usage: test_wms() and returns: ax