code: def test_cases(self):
      for case in TEST_CASES:
          self._run_case(case)
  
file_path: ParlAI/tests/tasks/reasoning_teacher/test_question_answer.py
imports: import unittest
  from parlai.core.params import ParlaiParser
  import parlai.utils.testing
  from parlai.tasks.reasoning.question_answer import MultipleChoiceQuestionAnswer
  from dataclasses import dataclass
label_desc: Use image node_id 2 for calling the TestMultipleChoiceQuestionAnswer obj's underlying member method code with example usage: obj.test_cases() without return types