class_docstr: Test case of database 
class_docstr_tok: ["Test","case","of","database"]
docstr: target: test list db with a not existed connection using
  method: list db with a random using
  expected: exception
docstr_tok: ["target",":","test","list","db","with","a","not","existed","connection","using","method",":","list","db","with","a","random","using","expected",":","exception"]
code: def test_list_db_not_existed_connection_using(self):
      """
      target: test list db with a not existed connection using
      method: list db with a random using
      expected: exception
      """
      # connect with default alias using
      self._connect()
  
      # list db with not existed using
      self.database_wrap.list_database(
          using="random",
          check_task=CheckTasks.err_res,
          check_items={
              ct.err_code: 1,
              ct.err_msg: "should create connect first.",
          },
      )
  
imports: import pandas
  import pytest
  from base.client_base import TestcaseBase
  from common.common_type import CheckTasks, CaseLabel
  from common import common_func
  from common import common_type
  from utils.util_log import test_log
label_desc: Use image node_id 8 for calling the TestDatabaseParams obj's underlying member method code with example usage: obj.test_list_db_not_existed_connection_using() without return types