使用httptest编写测试用例，利用httpserver和HTTPclient

func (s UserResource) Find(ctx context.Context, param string, condition bson.M, p api.Page) (v api.Responder, e error) {
   // validate authority
   uid, err := objectID(ctx)
   if err != nil {
      return nil, api.NewHTTPError(api.ErrAuthorization, api.CodeTokenAuthFailed)
   }
   rid, err := RoleID(s.UserStorage, uid)
   if err != nil {
      return nil, api.NewHTTPError(api.ErrAuthorization, api.CodeTokenAuthFailed)
   }
   permission, err := readAuthority(s.AuthorityStorage, rid, ModuleUserID)
   if err != nil {
      return nil, api.NewHTTPError(err, api.CodeNotEnoughAuthority)
   }

   // admin and customer account have access permission
   switch permission {
   case ReadWrite, OnlyRead:
      if param == "" {
         if !p.Valid {
            users, err := s.UserStorage.GetAll(condition)
            for k := range users {
               users[k].Password = utils.PasswordFormat
            }
            return &api.Response{Total: len(users), Data: interface{}(users), Status: http.StatusOK}, err
         }
         total, users, err := s.UserStorage.GetPage(p.Offset, p.Limit, condition)
         if err != nil {
            return &api.Response{}, api.NewHTTPError(err, api.CodeResourceNotFound)
         }
         for k := range users {
            users[k].Password = utils.PasswordFormat
         }
         return &api.Response{Total: total, Data: users, Status: http.StatusOK}, nil
      }
   default:
      return nil, api.NewHTTPError(api.ErrNotEnoughAuthority, api.CodeNotEnoughAuthority)
   }
   return nil, api.NewHTTPError(api.ErrInvalidURL, api.CodeInvalidURL)
}

哪位大佬帮忙写一下啊，刚开始，写不来，求教一下，利用HTTP server和HTTP client

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