code: def test_signature():
      assert doc["Signature"].startswith("numpy.multivariate_normal(")
      assert doc["Signature"].endswith("spam=None)")
  
imports: import sys, textwrap
  from numpydoc.docscrape import NumpyDocString, FunctionDoc, ClassDoc
  from numpydoc.docscrape_sphinx import SphinxDocString, SphinxClassDoc
  from nose.tools import *
label_desc: Use image node_id 1 for calling a global function with example usage: test_signature() without return types