def test_empty_list(self):
        self.assertIs(
            None, _latest_common_snapshot([Snapshot(name=b"a")], []))
If one of the ``list``\ s passed to ``_latest_common_snapshot`` is
dataset/ETHPy150Open ClusterHQ/flocker/flocker/volume/test/test_filesystems_zfs.py/LatestCommonSnapshotTests.test_empty_list