@GetMapping("/queryRootTag")
    public ShenyuAdminResult queryRootTag() {
        return ShenyuAdminResult.success(ShenyuResultMessage.QUERY_SUCCESS, tagService.findByParentTagId("0"));
    }
@Test
    public void testQueryRootTag() throws Exception {
        List<TagVO> tagVOS = new ArrayList<>();
        given(tagService.findByParentTagId("0")).willReturn(tagVOS);
        this.mockMvc.perform(MockMvcRequestBuilders.get("/tag/queryRootTag"))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.message", is(ShenyuResultMessage.QUERY_SUCCESS)))
                .andReturn();
    }