code: def test_build_formula_method(self):
      formula = self.connector._build_formula()
      expected_formula = "AND(Status='In progress')"
      self.assertEqual(formula, expected_formula)
  
file_path: pandas-ai/tests/connectors/test_airtable.py
imports: import unittest
  from pandasai.connectors import AirtableConnector
  from pandasai.connectors.base import AirtableConnectorConfig
  import pandas
  from unittest.mock import patch
  import json
label_desc: Use image node_id 9 for calling the TestAirTableConnector obj's underlying member method code with example usage: obj.test_build_formula_method() without return types