'When L{NNTPServer} receives a I{LISTGROUP} command, it sends a list of
message numbers for the messages in a particular group (RFC 3977,
section 6.1.2.1).'

def test_LISTGROUP(self):

    self.transport.clear()
    self.server.do_LISTGROUP('alt.test.nntp')
    self.assertEqual(self.transport.value().split('\r\n'), ['211    list    of    article    numbers    follow', '.', ''])
