def METHOD_NAME(self):
    """Verify the responded queryset."""
    # Create a question, there shouldn't be any responded yet.
    q = QuestionFactory()
    self.assertEqual(0, Question.objects.responded().count())
    # Add an answer, there should be one responded.
    a = AnswerFactory(question=q)
    self.assertEqual(1, Question.objects.responded().count())
    # Add an answer by the creator, there should be none responded.
    a = AnswerFactory(creator=q.creator, question=q)
    self.assertEqual(0, Question.objects.responded().count())
    # Add another answer, there should be one responded.
    a = AnswerFactory(question=q)
    self.assertEqual(1, Question.objects.responded().count())
    # Lock it, there should be none responded.
    q.is_locked = True
    q.save()
    self.assertEqual(0, Question.objects.responded().count())
    # Unlock it and mark solved, there should be none responded.
    q.is_locked = False
    q.solution = a
    q.save()
    self.assertEqual(0, Question.objects.responded().count())