def test_too_many(self):
        snapshotter = CannedFilesystemSnapshots([])
        self.assertRaises(IndexError, snapshotter.create, b"first")
Creating more than the canned number of snapshots results in an error.
dataset/ETHPy150Open ClusterHQ/flocker/flocker/volume/test/test_filesystems_memory.py/CannedFilesystemSnapshotsTests.test_too_many