def test_undeleteMessages(self):
        mailbox = mail.maildir.StringListMailbox(["foo"])
        mailbox.deleteMessage(0)
        mailbox.undeleteMessages()
        self.assertEqual(mailbox.listMessages(0), 3)
        self.assertEqual(mailbox.listMessages(), [3])
L{Factory.doStart} logs that it is starting a factory, followed by
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/mail/test/test_mail.py/StringListMailboxTests.test_undeleteMessages--crossover with--dataset/ETHPy150Open twisted/twisted/twisted/internet/test/test_protocol.py/FactoryTests.test_doStartLoggingStatement