'A sentence in the middle of a GSV sequence is correctly
identified (as being neither the last nor the first).'

def test_middleSentence(self):

    self.protocol.lineReceived(GPGSV_MIDDLE)
    sentence = self.receiver.receivedSentence
    self.assertFalse(sentence._isFirstGSVSentence())
    self.assertFalse(sentence._isLastGSVSentence())
