_failure(self):         conn, future = self.start_connect(self.addrinfo)         self.assert_pending((AF0, 'a'))         self.resolve_connect(AF0, 'a', False)         self.assert_pending((AF0, 'b'), (AF0, 'c'))         self.resolve_connect(AF0, 'b', False)         self.resolve_connect(AF0, 'c', True)         self.assertEqual(future.result(), (AF0, 'c', self.streams['c']))      