def test_procedural_interface(self):
backend = mock.Mock(spec=LockBackend)
key = "lock"
duration = 60
routing_key = None
lock = Lock(backend, key, duration, routing_key)
lock.acquire()
backend.acquire.assert_called_once_with(key, duration, routing_key)
lock.locked()
backend.locked.assert_called_once_with(key, routing_key)
lock.release()
backend.release.assert_called_once_with(key, routing_key)
backend.acquire.side_effect = Exception("Boom!")
with pytest.raises(UnableToAcquireLock):
lock.acquire()
