def METHOD_NAME(self) -> None:
    learner_groups = (
        learner_group_fetchers.get_learner_groups_joined_by_learner(
            self.LEARNER_ID_1
        )
    )
    self.assertEqual(len(learner_groups), 0)
    learner_group_services.add_learner_to_learner_group(
        self.LEARNER_GROUP_ID, self.LEARNER_ID_1, True)
    learner_groups = (
        learner_group_fetchers.get_learner_groups_joined_by_learner(
            self.LEARNER_ID_1
        )
    )
    self.assertEqual(len(learner_groups), 1)
    self.assertEqual(learner_groups[0].group_id, self.LEARNER_GROUP_ID)