def test_comment_history_create_maybe(self):
        comment = utils.create_comment(topic=self.topic)
        comment_history = CommentHistory.create_maybe(comment)
        self.assertTrue(comment_history.pk)
        comment_history2 = CommentHistory.create_maybe(comment)
        self.assertIsNone(comment_history2)
        self.assertEqual(len(CommentHistory.objects.filter(comment_fk=comment.pk)), 1)
should create the comment (hystory) if a comment for it does not exists
dataset/ETHPy150Open nitely/Spirit/spirit/comment/history/tests.py/CommentHistoryModelsTest.test_comment_history_create_maybe