@Override
    public String getServerStatus() {
        if (worker.isHealthServer()) {
            return UP;
        } else {
            return DOWN;
        }
    }
@Test
    void testGetServerStatus() {
        Mockito.when(mockWoker.isHealthServer()).thenReturn(true);
        assertEquals("UP", nacosConfigService.getServerStatus());
        Mockito.verify(mockWoker, Mockito.times(1)).isHealthServer();
        
        Mockito.when(mockWoker.isHealthServer()).thenReturn(false);
        assertEquals("DOWN", nacosConfigService.getServerStatus());
        Mockito.verify(mockWoker, Mockito.times(2)).isHealthServer();
        
    }