def test_drop_obs_column():
    adata = ad.AnnData(np.array(X_list), obs=obs_dict, dtype="int32")

    subset = adata[:2]
    assert subset.is_view
    # returns a copy of obs
    assert subset.obs.drop(columns=["oanno1"]).columns.tolist() == ["oanno2", "oanno3"]
    assert subset.is_view
    # would modify obs, so it should actualize subset and not modify adata
    subset.obs.drop(columns=["oanno1"], inplace=True)
    assert not subset.is_view
    assert subset.obs.columns.tolist() == ["oanno2", "oanno3"]

    assert adata.obs.columns.tolist() == ["oanno1", "oanno2", "oanno3"]
def test_validate_question_reviewer_count_fails_for_non_integer_count(
            self):
        community_contribution_stats = (
            suggestion_services.get_community_contribution_stats()
        )
        community_contribution_stats.question_reviewer_count = (
            self.non_integer_count
        )

        with self.assertRaisesRegex(
            utils.ValidationError,
            'Expected the question reviewer count to be an integer, '
            'received: %s.' % (
                community_contribution_stats.question_reviewer_count)
        ):
            community_contribution_stats.validate()