class_docstr: Test case of database 
class_docstr_tok: ["Test","case","of","database"]
docstr: target: test create db without connection
  method: create db without connection
  expected: exception
docstr_tok: ["target",":","test","create","db","without","connection","method",":","create","db","without","connection","expected",":","exception"]
code: def test_create_db_without_connection(self):
      """
      target: test create db without connection
      method: create db without connection
      expected: exception
      """
      self.connection_wrap.disconnect(ct.default_alias)
      error = {
          ct.err_code: 1,
          ct.err_msg: "should create connect first",
      }
      self.database_wrap.create_database(
          cf.gen_unique_str(),
          check_task=CheckTasks.err_res,
          check_items=error,
      )
  
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 5 for calling the TestDatabaseParams obj's underlying member method code with example usage: obj.test_create_db_without_connection() without return types