### Question:
WxCpTagServiceImpl implements WxCpTagService { @Override public void update(String tagId, String tagName) throws WxErrorException { String url = "https: JsonObject o = new JsonObject(); o.addProperty("tagid", tagId); o.addProperty("tagname", tagName); this.mainService.post(url, o.toString()); } WxCpTagServiceImpl(WxCpService mainService); @Override String create(String tagName); @Override void update(String tagId, String tagName); @Override void delete(String tagId); @Override List<WxCpTag> listAll(); @Override List<WxCpUser> listUsersByTagId(String tagId); @Override WxCpTagAddOrRemoveUsersResult addUsers2Tag(String tagId, List<String> userIds, List<String> partyIds); @Override WxCpTagAddOrRemoveUsersResult removeUsersFromTag(String tagId, List<String> userIds, List<String> partyIds); @Override WxCpTagGetResult get(String tagId);  }### Answer:
@Test(dependsOnMethods = "testCreate") public void testUpdate() throws Exception { this.wxService.getTagService().update(this.tagId, "测试标签-改名" + System.currentTimeMillis()); }