'Verify the request for creating a pubsubhubbub hook.'

def test_pubsubhubbub_required_topic(self):

    body = [('hub.mode', ''), ('hub.topic', ''), ('hub.callback', 'https://localhost/post')]
    data = dict([(k[4:], v) for (k, v) in body])
    self.instance.pubsubhubbub(**data)
    assert (self.session.post.called is False)
