def callback():
     client.ping(address_alpha, url="http://doesnt.exist.com")
 def callback():
     client.ping("xyz", url=url)
 def callback():
     client.ping(address_alpha, url=url + "/xyz")
 def test_ping(self):
     self.assertTrue(client.register(address_alpha, url=url))
     self.assertTrue(client.ping(address_alpha, url=url))