def test_no_common(self):
        self.assertIs(
            None,
            _latest_common_snapshot(
                [Snapshot(name=b"a")], [Snapshot(name=b"b")]))
Asserts that the mock hander did log some messages.
dataset/ETHPy150Open ClusterHQ/flocker/flocker/volume/test/test_filesystems_zfs.py/LatestCommonSnapshotTests.test_no_common--crossover with--dataset/ETHPy150Open Yelp/Testify/testify/utils/mock_logging.py/MockHandler.assert_logged