}
	wrongID := types.UID("wrong-uid")
	myID := types.UID("my-uid")
	err = s.GuaranteedUpdate(context.Background(), "key", obj, false, &storage.Preconditions{UID: &wrongID}, updateFunc, true, nil)
	if e, ok := err.(*storage.StorageError); !ok || e.Code != storage.ErrCodeInvalidObj {
		t.Errorf("Expected invalid object, error: %v", err)
	}

type MatchValue struct {
	IndexName string
	Value     string
}

// Pass an UpdateFunc to Interface.GuaranteedUpdate to make an update
// that is guaranteed to succeed.
// See the comment for GuaranteedUpdate for more details.
type UpdateFunc func(input runtime.Object, res ResponseMeta) (output runtime.Object, ttl *uint64, err error)

	// note: this means that this lease doesn't enforce mutual exclusion of ip/port usage between apiserver.
	key := path.Join(r.serverLeases.baseKey, serverId)
	return r.serverLeases.storage.GuaranteedUpdate(apirequest.NewDefaultContext(), key, &corev1.Endpoints{}, true, nil, func(input kruntime.Object, respMeta storage.ResponseMeta) (kruntime.Object, *uint64, error) {
		existing := input.(*corev1.Endpoints)

		if err != nil {
			recordDecodeError(s.groupResourceString, key)
			return err
		}
		return nil
	}
}

// GuaranteedUpdate implements storage.Interface.GuaranteedUpdate.
func (s *store) GuaranteedUpdate(
	ctx context.Context, key string, destination runtime.Object, ignoreNotFound bool,

// UpdateLease resets the TTL on a master IP in storage
// UpdateLease will create a new key if it doesn't exist.
func (s *storageLeases) UpdateLease(ip string) error {
	key := path.Join(s.baseKey, ip)
	return s.storage.GuaranteedUpdate(apirequest.NewDefaultContext(), key, &corev1.Endpoints{}, true, nil, func(input kruntime.Object, respMeta storage.ResponseMeta) (kruntime.Object, *uint64, error) {

	expectInvalidKey("Get", store.Get(ctx, invalidKey, storage.GetOptions{}, nil))
	expectInvalidKey("GetList", store.GetList(ctx, invalidKey, storage.ListOptions{}, nil))
	expectInvalidKey("GuaranteedUpdate", store.GuaranteedUpdate(ctx, invalidKey, nil, true, nil, nil, nil))
	_, countErr := store.Count(invalidKey)
	expectInvalidKey("Count", countErr)
}

func TestResolveGetListRev(t *testing.T) {
	_, store, _ := testSetup(t)

		return err
	}
	return nil
}

// applyPatch is called every time GuaranteedUpdate asks for the updated object,
// and is given the currently persisted object as input.
// TODO: rename this function because the name implies it is related to applyPatcher

	// Simulate GuaranteedUpdate behavior (retries internally on etcd changes if the incoming resource doesn't pin resourceVersion)
	for {
		currentPod := p.startingPod
		if p.numUpdates > 0 {
			currentPod = p.updatePod
		}
		p.numUpdates++