'SSHSession.dataReceived() passes data along to a client.  If the data
comes before there is a client, the data should be discarded.'

def test_client_dataReceived(self):

    self.session.dataReceived('1')
    self.session.client = StubClient()
    self.session.dataReceived('2')
    self.assertEqual(self.session.client.transport.buf, '2')
