'Verify that a simple command can be sent and its response received with
the simple low-level string-based API.'

def test_helloWorld(self):

    (c, s, p) = connectedServerAndClient()
    L = []
    HELLO = 'world'
    c.sendHello(HELLO).addCallback(L.append)
    p.flush()
    self.assertEqual(L[0]['hello'], HELLO)
