class_docstr: Tests for the ChatsTable class.
docstr: Set up the tests.
docstr_tok: ["Set","up","the","tests","."]
code: def setUpClass(cls):
      """
      Set up the tests.
      """
  
      # mock the api handler
      cls.api_handler = Mock(MSTeamsHandler)
  
imports: import unittest
  from unittest.mock import Mock, patch
  from mindsdb_sql.parser import ast
  from mindsdb_sql.parser.ast import Constant, BinaryOperation
  from mindsdb_sql.parser.ast.select.star import Star
  from mindsdb_sql.parser.ast.select.identifier import Identifier
  from mindsdb.integrations.handlers.ms_teams_handler.ms_teams_handler import MSTeamsHandler
  from mindsdb.integrations.handlers.ms_teams_handler.settings import ms_teams_handler_config
  from mindsdb.integrations.handlers.ms_teams_handler.ms_graph_api_teams_client import MSGraphAPITeamsClient
  from mindsdb.integrations.handlers.ms_teams_handler.ms_teams_tables import ChatsTable, ChatMessagesTable, ChannelsTable, ChannelMessagesTable
label_desc: Use image node_id 1 for calling the TestChatsTable obj's underlying member method code with example usage: obj.setUpClass(cls) without return types