def test_parser_snapshot_to_datetime(self):
     apt_btrfs = AptBtrfsSnapshot(
         fstab=os.path.join(self.testdir, "data", "fstab"))
     e = "@apt-snapshot-2017-12-15_11:26:24"
     t_parsed = apt_btrfs._parse_snapshot_to_datetime(e)
     t_expected = datetime.datetime(2017, 12, 15, 11, 26, 24)
     self.assertEqual(t_parsed, t_expected)