def test_disabling_concurrency_limit(self):
        conv_resource = StreamingConversationResource(
            self.app, self.conversation.key)
        # negative concurrency limit disables it
        ctxt = ConfigContext(user_account=self.conversation.user_account.key,
                             concurrency_limit=-1)
        config = yield self.app.get_config(msg=None, ctxt=ctxt)
        self.assertTrue(
            (yield conv_resource.is_allowed(
                config, self.conversation.user_account.key)))