### Question:
WxCpTagServiceImpl implements WxCpTagService { @Override public WxCpTagAddOrRemoveUsersResult addUsers2Tag(String tagId, List<String> userIds, List<String> partyIds) throws WxErrorException { String url = "https: JsonObject jsonObject = new JsonObject(); jsonObject.addProperty("tagid", tagId); this.addUserIdsAndPartyIdsToJson(userIds, partyIds, jsonObject); return WxCpTagAddOrRemoveUsersResult.fromJson(this.mainService.post(url, jsonObject.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 = {"testListAll", "testUpdate", "testCreate"}) public void testAddUsers2Tag() throws Exception { List<String> userIds = Splitter.on("|").splitToList(this.configStorage.getUserId()); WxCpTagAddOrRemoveUsersResult result = this.wxService.getTagService().addUsers2Tag(this.tagId, userIds, null); assertEquals(result.getErrCode(), Integer.valueOf(0)); }