public Member self() {
        return memberManager.getSelf();
    }
@Test
    void testSelf() {
        Member member = new Member();
        member.setIp("1.1.1.1");
        member.setPort(8848);
        member.setState(NodeState.UP);
        
        when(serverMemberManager.getSelf()).thenReturn(member);
        
        Member result = nacosClusterOperationService.self();
        assertEquals("1.1.1.1:8848", result.getAddress());
    }