def test_iternodes(self):
"""test Heading.__iternodes__()"""
text1, text2 = Text("foo"), Text("bar")
node = Heading(wrap([text1, text2]), 3)
gen = node.__iternodes__(getnodes)
self.assertEqual((None, node), next(gen))
self.assertEqual((node.title, text1), next(gen))
self.assertEqual((node.title, text2), next(gen))
self.assertRaises(StopIteration, next, gen)
