class_docstr: Tests for the ChannelsTable class.
docstr: Test that get_columns returns all columns.
docstr_tok: ["Test","that","get_columns","returns","all","columns","."]
code: def test_get_columns_returns_all_columns(self):
      """
      Test that get_columns returns all columns.
      """
  
      channels_table = ChannelsTable(self.api_handler)
  
      self.assertListEqual(
          channels_table.get_columns(),
          ms_teams_handler_config.CHANNELS_TABLE_COLUMNS,
      )
  
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 2 for calling the TestChannelsTable obj's underlying member method code with example usage: obj.test_get_columns_returns_all_columns() without return types