public ServerStatus getServerStatus() {
        return serverStatus;
    }
@Test
    void testUpdaterFromConsistency3() {
        ServerStatusManager serverStatusManager = new ServerStatusManager(protocolManager, switchDomain);
        ServerStatusManager.ServerStatusUpdater updater = serverStatusManager.new ServerStatusUpdater();
        //then
        updater.run();
        //then
        assertEquals(ServerStatus.DOWN, serverStatusManager.getServerStatus());
    }