code: def test_invalid_cost_list_length(self, cost_manager):
      expected = (
          "treatment_cost must be a list with the same number of "
          "elements as treatment_features. "
          "Length of treatment_cost was 2, expected 3."
      )
      with pytest.raises(UserConfigValidationException, match=expected):
          cost_manager.add(
              ["AveRooms", "Population", "AveOccup"],
              treatment_cost=[1, 2],
          )
  
imports: import os
  from unittest.mock import ANY, patch
  import numpy
  import pytest
  from raiutils.exceptions import UserConfigValidationException
  from raiutils.models import ModelTask
  from responsibleai import RAIInsights
  from responsibleai._interfaces import CausalData
  from responsibleai._internal.constants import FileFormats
  from responsibleai._tools.shared.state_directory_management import DirectoryManager
  from responsibleai.managers.causal_manager import CausalManager
label_desc: Use image node_id 4 for calling the TestCausalManagerTreatmentCosts obj's underlying member method code with example usage: obj.test_invalid_cost_list_length(cost_manager) without return types