'``ZFSSnapshots.create()`` calls the ``zfs snapshot`` command with the
given ``bytes`` as the snapshot name.'

def test_create(self):

    reactor = FakeProcessReactor()
    snapshots = ZFSSnapshots(reactor, Filesystem('pool', 'fs'))
    snapshots.create('myname')
    arguments = reactor.processes[0]
    self.assertEqual(arguments.args, ['zfs', 'snapshot', 'pool/fs@myname'])
