'L{imap4.IMAP4Server.search_NOT} returns the negation of the result
of the expression supplied to it.'

def test_searchNot(self):

    self.assertFalse(self.server.search_NOT((['SENTSINCE'] + self.earlierQuery), self.seq, self.msg, (None, None)))
    self.assertTrue(self.server.search_NOT((['SENTON'] + self.laterQuery), self.seq, self.msg, (None, None)))
