### Question:
WxCpTagServiceImpl implements WxCpTagService { @Override public List<WxCpUser> listUsersByTagId(String tagId) throws WxErrorException { String url = "https: String responseContent = this.mainService.get(url, null); JsonElement tmpJsonElement = new JsonParser().parse(responseContent); return WxCpGsonBuilder.create() .fromJson( tmpJsonElement.getAsJsonObject().get("userlist"), new TypeToken<List<WxCpUser>>() { }.getType() ); } 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 = {"testAddUsers2Tag", "testListAll", "testUpdate", "testCreate"}) public void testListUsersByTagId() throws Exception { List<WxCpUser> users = this.wxService.getTagService().listUsersByTagId(this.tagId); assertNotEquals(users.size(), 0); }