Merge netsim mig to master (#17241)

* swarm: merged stream-tests migration to develop

* swarm/network: expose simulation RandomUpNode to use in stream tests

* swarm/network: wait for subs in PeerEvents and fix stream.runSyncTest

* swarm: enforce waitkademlia for snapshot tests

* swarm: fixed syncer tests and snapshot_sync_test

* swarm: linting of simulation package

* swarm: address review comments

* swarm/network/stream: fix delivery_test bugs and refactor

* swarm/network/stream: addressed PR comments @janos

* swarm/network/stream: enforce waitKademlia, improve TestIntervals

* swarm/network/stream: TestIntervals not waiting for chunk to be stored

swarm/network/simulation/bucket.go

@@ -43,7 +43,7 @@ func (s *Simulation) SetNodeItem(id discover.NodeID, key interface{}, value inte
 	s.buckets[id].Store(key, value)
 }
 
-// NodeItems returns a map of items from all nodes that are all set under the
+// NodesItems returns a map of items from all nodes that are all set under the
 // same BucketKey.
 func (s *Simulation) NodesItems(key interface{}) (values map[discover.NodeID]interface{}) {
 	s.mu.RLock()

swarm/network/simulation/connect.go

@@ -54,7 +54,7 @@ func (s *Simulation) ConnectToLastNode(id discover.NodeID) (err error) {
 // ConnectToRandomNode connects the node with provieded NodeID
 // to a random node that is up.
 func (s *Simulation) ConnectToRandomNode(id discover.NodeID) (err error) {
-	n := s.randomUpNode(id)
+	n := s.RandomUpNode(id)
 	if n == nil {
 		return ErrNodeNotFound
 	}
@@ -135,7 +135,7 @@ func (s *Simulation) ConnectNodesStar(id discover.NodeID, ids []discover.NodeID)
 	return nil
 }
 
-// ConnectNodesStar connects all nodes in a star topology
+// ConnectNodesStarPivot connects all nodes in a star topology
 // with the center at already set pivot node.
 // If ids argument is nil, all nodes that are up will be connected.
 func (s *Simulation) ConnectNodesStarPivot(ids []discover.NodeID) (err error) {

swarm/network/simulation/events.go

@@ -18,6 +18,7 @@ package simulation
 
 import (
 	"context"
+	"sync"
 
 	"github.com/ethereum/go-ethereum/p2p/discover"
 
@@ -71,24 +72,32 @@ func (f *PeerEventsFilter) MsgCode(c uint64) *PeerEventsFilter {
 func (s *Simulation) PeerEvents(ctx context.Context, ids []discover.NodeID, filters ...*PeerEventsFilter) <-chan PeerEvent {
 	eventC := make(chan PeerEvent)
 
+	// wait group to make sure all subscriptions to admin peerEvents are established
+	// before this function returns.
+	var subsWG sync.WaitGroup
 	for _, id := range ids {
 		s.shutdownWG.Add(1)
+		subsWG.Add(1)
 		go func(id discover.NodeID) {
 			defer s.shutdownWG.Done()
 
 			client, err := s.Net.GetNode(id).Client()
 			if err != nil {
+				subsWG.Done()
 				eventC <- PeerEvent{NodeID: id, Error: err}
 				return
 			}
 			events := make(chan *p2p.PeerEvent)
 			sub, err := client.Subscribe(ctx, "admin", events, "peerEvents")
 			if err != nil {
+				subsWG.Done()
 				eventC <- PeerEvent{NodeID: id, Error: err}
 				return
 			}
 			defer sub.Unsubscribe()
 
+			subsWG.Done()
+
 			for {
 				select {
 				case <-ctx.Done():
@@ -153,5 +162,7 @@ func (s *Simulation) PeerEvents(ctx context.Context, ids []discover.NodeID, filt
 		}(id)
 	}
 
+	// wait all subscriptions
+	subsWG.Wait()
 	return eventC
 }

swarm/network/simulation/http.go

@@ -29,7 +29,7 @@ var (
 	DefaultHTTPSimAddr = ":8888"
 )
 
-//`With`(builder) pattern constructor for Simulation to
+//WithServer implements the builder pattern constructor for Simulation to
 //start with a HTTP server
 func (s *Simulation) WithServer(addr string) *Simulation {
 	//assign default addr if nothing provided
@@ -46,7 +46,12 @@ func (s *Simulation) WithServer(addr string) *Simulation {
 		Addr:    addr,
 		Handler: s.handler,
 	}
-	go s.httpSrv.ListenAndServe()
+	go func() {
+		err := s.httpSrv.ListenAndServe()
+		if err != nil {
+			log.Error("Error starting the HTTP server", "error", err)
+		}
+	}()
 	return s
 }
 
@@ -55,7 +60,7 @@ func (s *Simulation) addSimulationRoutes() {
 	s.handler.POST("/runsim", s.RunSimulation)
 }
 
-// StartNetwork starts all nodes in the network
+// RunSimulation is the actual POST endpoint runner
 func (s *Simulation) RunSimulation(w http.ResponseWriter, req *http.Request) {
 	log.Debug("RunSimulation endpoint running")
 	s.runC <- struct{}{}

swarm/network/simulation/http_test.go

@@ -96,7 +96,12 @@ func sendRunSignal(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Request failed: %v", err)
 	}
-	defer resp.Body.Close()
+	defer func() {
+		err := resp.Body.Close()
+		if err != nil {
+			log.Error("Error closing response body", "err", err)
+		}
+	}()
 	log.Debug("Signal sent")
 	if resp.StatusCode != http.StatusOK {
 		t.Fatalf("err %s", resp.Status)

swarm/network/simulation/node.go

@@ -195,7 +195,7 @@ func (s *Simulation) AddNodesAndConnectStar(count int, opts ...AddNodeOption) (i
 	return ids, nil
 }
 
-//Upload a snapshot
+//UploadSnapshot uploads a snapshot to the simulation
 //This method tries to open the json file provided, applies the config to all nodes
 //and then loads the snapshot into the Simulation network
 func (s *Simulation) UploadSnapshot(snapshotFile string, opts ...AddNodeOption) error {
@@ -203,7 +203,12 @@ func (s *Simulation) UploadSnapshot(snapshotFile string, opts ...AddNodeOption)
 	if err != nil {
 		return err
 	}
-	defer f.Close()
+	defer func() {
+		err := f.Close()
+		if err != nil {
+			log.Error("Error closing snapshot file", "err", err)
+		}
+	}()
 	jsonbyte, err := ioutil.ReadAll(f)
 	if err != nil {
 		return err
@@ -294,7 +299,7 @@ func (s *Simulation) StopNode(id discover.NodeID) (err error) {
 
 // StopRandomNode stops a random node.
 func (s *Simulation) StopRandomNode() (id discover.NodeID, err error) {
-	n := s.randomUpNode()
+	n := s.RandomUpNode()
 	if n == nil {
 		return id, ErrNodeNotFound
 	}
@@ -324,18 +329,18 @@ func init() {
 	rand.Seed(time.Now().UnixNano())
 }
 
-// randomUpNode returns a random SimNode that is up.
+// RandomUpNode returns a random SimNode that is up.
 // Arguments are NodeIDs for nodes that should not be returned.
-func (s *Simulation) randomUpNode(exclude ...discover.NodeID) *adapters.SimNode {
+func (s *Simulation) RandomUpNode(exclude ...discover.NodeID) *adapters.SimNode {
 	return s.randomNode(s.UpNodeIDs(), exclude...)
 }
 
-// randomUpNode returns a random SimNode that is not up.
+// randomDownNode returns a random SimNode that is not up.
 func (s *Simulation) randomDownNode(exclude ...discover.NodeID) *adapters.SimNode {
 	return s.randomNode(s.DownNodeIDs(), exclude...)
 }
 
-// randomUpNode returns a random SimNode from the slice of NodeIDs.
+// randomNode returns a random SimNode from the slice of NodeIDs.
 func (s *Simulation) randomNode(ids []discover.NodeID, exclude ...discover.NodeID) *adapters.SimNode {
 	for _, e := range exclude {
 		var i int

swarm/network/simulation/service.go

@@ -39,7 +39,7 @@ func (s *Simulation) Service(name string, id discover.NodeID) node.Service {
 // RandomService returns a single Service by name on a
 // randomly chosen node that is up.
 func (s *Simulation) RandomService(name string) node.Service {
-	n := s.randomUpNode()
+	n := s.RandomUpNode()
 	if n == nil {
 		return nil
 	}

swarm/network/stream/common_test.go

@@ -18,135 +18,70 @@ package stream
 
 import (
 	"context"
-	"encoding/binary"
+	crand "crypto/rand"
 	"errors"
 	"flag"
 	"fmt"
 	"io"
 	"io/ioutil"
+	"math/rand"
 	"os"
+	"strings"
 	"sync/atomic"
 	"testing"
 	"time"
 
-	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/log"
-	"github.com/ethereum/go-ethereum/node"
-	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/p2p/discover"
-	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
 	p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
-	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/ethereum/go-ethereum/swarm/network"
+	"github.com/ethereum/go-ethereum/swarm/network/simulation"
+	"github.com/ethereum/go-ethereum/swarm/pot"
 	"github.com/ethereum/go-ethereum/swarm/state"
 	"github.com/ethereum/go-ethereum/swarm/storage"
-	"github.com/ethereum/go-ethereum/swarm/storage/mock"
+	mockdb "github.com/ethereum/go-ethereum/swarm/storage/mock/db"
-	"github.com/ethereum/go-ethereum/swarm/storage/mock/db"
 	colorable "github.com/mattn/go-colorable"
 )
 
 var (
-	deliveries   map[discover.NodeID]*Delivery
-	stores       map[discover.NodeID]storage.ChunkStore
-	toAddr       func(discover.NodeID) *network.BzzAddr
-	peerCount    func(discover.NodeID) int
-	adapter      = flag.String("adapter", "sim", "type of simulation: sim|exec|docker")
 	loglevel     = flag.Int("loglevel", 2, "verbosity of logs")
 	nodes        = flag.Int("nodes", 0, "number of nodes")
 	chunks       = flag.Int("chunks", 0, "number of chunks")
 	useMockStore = flag.Bool("mockstore", false, "disabled mock store (default: enabled)")
-)
+	longrunning  = flag.Bool("longrunning", false, "do run long-running tests")
+
+	bucketKeyDB        = simulation.BucketKey("db")
+	bucketKeyStore     = simulation.BucketKey("store")
+	bucketKeyFileStore = simulation.BucketKey("filestore")
+	bucketKeyNetStore  = simulation.BucketKey("netstore")
+	bucketKeyDelivery  = simulation.BucketKey("delivery")
+	bucketKeyRegistry  = simulation.BucketKey("registry")
 
-var (
-	defaultSkipCheck  bool
-	waitPeerErrC      chan error
 	chunkSize = 4096
-	registries        map[discover.NodeID]*TestRegistry
+	pof       = pot.DefaultPof(256)
-	createStoreFunc   func(id discover.NodeID, addr *network.BzzAddr) (storage.ChunkStore, error)
-	getRetrieveFunc   = defaultRetrieveFunc
-	subscriptionCount = 0
-	globalStore       mock.GlobalStorer
-	globalStoreDir    string
 )
 
-var services = adapters.Services{
-	"streamer":          NewStreamerService,
-	"intervalsStreamer": newIntervalsStreamerService,
-}
-
 func init() {
 	flag.Parse()
-	// register the Delivery service which will run as a devp2p
+	rand.Seed(time.Now().UnixNano())
-	// protocol when using the exec adapter
-	adapters.RegisterServices(services)
 
 	log.PrintOrigins(true)
 	log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(*loglevel), log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true))))
 }
 
-func createGlobalStore() {
+func createGlobalStore() (string, *mockdb.GlobalStore, error) {
-	var err error
+	var globalStore *mockdb.GlobalStore
-	globalStoreDir, err = ioutil.TempDir("", "global.store")
+	globalStoreDir, err := ioutil.TempDir("", "global.store")
 	if err != nil {
 		log.Error("Error initiating global store temp directory!", "err", err)
-		return
+		return "", nil, err
 	}
-	globalStore, err = db.NewGlobalStore(globalStoreDir)
+	globalStore, err = mockdb.NewGlobalStore(globalStoreDir)
 	if err != nil {
 		log.Error("Error initiating global store!", "err", err)
+		return "", nil, err
 	}
-}
+	return globalStoreDir, globalStore, nil
-
-// NewStreamerService
-func NewStreamerService(ctx *adapters.ServiceContext) (node.Service, error) {
-	var err error
-	id := ctx.Config.ID
-	addr := toAddr(id)
-	kad := network.NewKademlia(addr.Over(), network.NewKadParams())
-	stores[id], err = createStoreFunc(id, addr)
-	if err != nil {
-		return nil, err
-	}
-	store := stores[id].(*storage.LocalStore)
-	db := storage.NewDBAPI(store)
-	delivery := NewDelivery(kad, db)
-	deliveries[id] = delivery
-	r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
-		SkipCheck:  defaultSkipCheck,
-		DoRetrieve: false,
-	})
-	RegisterSwarmSyncerServer(r, db)
-	RegisterSwarmSyncerClient(r, db)
-	go func() {
-		waitPeerErrC <- waitForPeers(r, 1*time.Second, peerCount(id))
-	}()
-	fileStore := storage.NewFileStore(storage.NewNetStore(store, getRetrieveFunc(id)), storage.NewFileStoreParams())
-	testRegistry := &TestRegistry{Registry: r, fileStore: fileStore}
-	registries[id] = testRegistry
-	return testRegistry, nil
-}
-
-func defaultRetrieveFunc(id discover.NodeID) func(ctx context.Context, chunk *storage.Chunk) error {
-	return nil
-}
-
-func datadirsCleanup() {
-	for _, id := range ids {
-		os.RemoveAll(datadirs[id])
-	}
-	if globalStoreDir != "" {
-		os.RemoveAll(globalStoreDir)
-	}
-}
-
-//local stores need to be cleaned up after the sim is done
-func localStoreCleanup() {
-	log.Info("Cleaning up...")
-	for _, id := range ids {
-		registries[id].Close()
-		stores[id].Close()
-	}
-	log.Info("Local store cleanup done")
 }
 
 func newStreamerTester(t *testing.T) (*p2ptest.ProtocolTester, *Registry, *storage.LocalStore, func(), error) {
@@ -174,9 +109,7 @@ func newStreamerTester(t *testing.T) (*p2ptest.ProtocolTester, *Registry, *stora
 
 	db := storage.NewDBAPI(localStore)
 	delivery := NewDelivery(to, db)
-	streamer := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
+	streamer := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), nil)
-		SkipCheck: defaultSkipCheck,
-	})
 	teardown := func() {
 		streamer.Close()
 		removeDataDir()
@@ -233,22 +166,6 @@ func (rrs *roundRobinStore) Close() {
 	}
 }
 
-type TestRegistry struct {
-	*Registry
-	fileStore *storage.FileStore
-}
-
-func (r *TestRegistry) APIs() []rpc.API {
-	a := r.Registry.APIs()
-	a = append(a, rpc.API{
-		Namespace: "stream",
-		Version:   "3.0",
-		Service:   r,
-		Public:    true,
-	})
-	return a
-}
-
 func readAll(fileStore *storage.FileStore, hash []byte) (int64, error) {
 	r, _ := fileStore.Retrieve(context.TODO(), hash)
 	buf := make([]byte, 1024)
@@ -265,185 +182,74 @@ func readAll(fileStore *storage.FileStore, hash []byte) (int64, error) {
 	return total, nil
 }
 
-func (r *TestRegistry) ReadAll(hash common.Hash) (int64, error) {
+func uploadFilesToNodes(sim *simulation.Simulation) ([]storage.Address, []string, error) {
-	return readAll(r.fileStore, hash[:])
+	nodes := sim.UpNodeIDs()
+	nodeCnt := len(nodes)
+	log.Debug(fmt.Sprintf("Uploading %d files to nodes", nodeCnt))
+	//array holding generated files
+	rfiles := make([]string, nodeCnt)
+	//array holding the root hashes of the files
+	rootAddrs := make([]storage.Address, nodeCnt)
+
+	var err error
+	//for every node, generate a file and upload
+	for i, id := range nodes {
+		item, ok := sim.NodeItem(id, bucketKeyFileStore)
+		if !ok {
+			return nil, nil, fmt.Errorf("Error accessing localstore")
 		}
-
+		fileStore := item.(*storage.FileStore)
-func (r *TestRegistry) Start(server *p2p.Server) error {
+		//generate a file
-	return r.Registry.Start(server)
+		rfiles[i], err = generateRandomFile()
-}
-
-func (r *TestRegistry) Stop() error {
-	return r.Registry.Stop()
-}
-
-type TestExternalRegistry struct {
-	*Registry
-}
-
-func (r *TestExternalRegistry) APIs() []rpc.API {
-	a := r.Registry.APIs()
-	a = append(a, rpc.API{
-		Namespace: "stream",
-		Version:   "3.0",
-		Service:   r,
-		Public:    true,
-	})
-	return a
-}
-
-func (r *TestExternalRegistry) GetHashes(ctx context.Context, peerId discover.NodeID, s Stream) (*rpc.Subscription, error) {
-	peer := r.getPeer(peerId)
-
-	client, err := peer.getClient(ctx, s)
 		if err != nil {
-		return nil, err
+			return nil, nil, err
 		}
-
+		//store it (upload it) on the FileStore
-	c := client.Client.(*testExternalClient)
+		ctx := context.TODO()
-
+		rk, wait, err := fileStore.Store(ctx, strings.NewReader(rfiles[i]), int64(len(rfiles[i])), false)
-	notifier, supported := rpc.NotifierFromContext(ctx)
+		log.Debug("Uploaded random string file to node")
-	if !supported {
-		return nil, fmt.Errorf("Subscribe not supported")
-	}
-
-	sub := notifier.CreateSubscription()
-
-	go func() {
-		// if we begin sending event immediately some events
-		// will probably be dropped since the subscription ID might not be send to
-		// the client.
-		// ref: rpc/subscription_test.go#L65
-		time.Sleep(1 * time.Second)
-		for {
-			select {
-			case h := <-c.hashes:
-				<-c.enableNotificationsC // wait for notification subscription to complete
-				if err := notifier.Notify(sub.ID, h); err != nil {
-					log.Warn(fmt.Sprintf("rpc sub notifier notify stream %s: %v", s, err))
-				}
-			case err := <-sub.Err():
 		if err != nil {
-					log.Warn(fmt.Sprintf("caught subscription error in stream %s: %v", s, err))
+			return nil, nil, err
 		}
-			case <-notifier.Closed():
+		err = wait(ctx)
-				log.Trace(fmt.Sprintf("rpc sub notifier closed"))
-				return
-			}
-		}
-	}()
-
-	return sub, nil
-}
-
-func (r *TestExternalRegistry) EnableNotifications(peerId discover.NodeID, s Stream) error {
-	peer := r.getPeer(peerId)
-
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-
-	client, err := peer.getClient(ctx, s)
 		if err != nil {
-		return err
+			return nil, nil, err
+		}
+		rootAddrs[i] = rk
+	}
+	return rootAddrs, rfiles, nil
 }
 
-	close(client.Client.(*testExternalClient).enableNotificationsC)
+//generate a random file (string)
-
+func generateRandomFile() (string, error) {
-	return nil
+	//generate a random file size between minFileSize and maxFileSize
+	fileSize := rand.Intn(maxFileSize-minFileSize) + minFileSize
+	log.Debug(fmt.Sprintf("Generated file with filesize %d kB", fileSize))
+	b := make([]byte, fileSize*1024)
+	_, err := crand.Read(b)
+	if err != nil {
+		log.Error("Error generating random file.", "err", err)
+		return "", err
+	}
+	return string(b), nil
 }
 
-// TODO: merge functionalities of testExternalClient and testExternalServer
+//create a local store for the given node
-// with testClient and testServer.
+func createTestLocalStorageForID(id discover.NodeID, addr *network.BzzAddr) (storage.ChunkStore, string, error) {
-
+	var datadir string
-type testExternalClient struct {
+	var err error
-	hashes               chan []byte
+	datadir, err = ioutil.TempDir("", fmt.Sprintf("syncer-test-%s", id.TerminalString()))
-	db                   *storage.DBAPI
+	if err != nil {
-	enableNotificationsC chan struct{}
+		return nil, "", err
 	}
-
+	var store storage.ChunkStore
-func newTestExternalClient(db *storage.DBAPI) *testExternalClient {
+	params := storage.NewDefaultLocalStoreParams()
-	return &testExternalClient{
+	params.ChunkDbPath = datadir
-		hashes:               make(chan []byte),
+	params.BaseKey = addr.Over()
-		db:                   db,
+	store, err = storage.NewTestLocalStoreForAddr(params)
-		enableNotificationsC: make(chan struct{}),
+	if err != nil {
+		os.RemoveAll(datadir)
+		return nil, "", err
 	}
-}
+	return store, datadir, nil
-
-func (c *testExternalClient) NeedData(ctx context.Context, hash []byte) func() {
-	chunk, _ := c.db.GetOrCreateRequest(ctx, hash)
-	if chunk.ReqC == nil {
-		return nil
-	}
-	c.hashes <- hash
-	return func() {
-		chunk.WaitToStore()
-	}
-}
-
-func (c *testExternalClient) BatchDone(Stream, uint64, []byte, []byte) func() (*TakeoverProof, error) {
-	return nil
-}
-
-func (c *testExternalClient) Close() {}
-
-const testExternalServerBatchSize = 10
-
-type testExternalServer struct {
-	t         string
-	keyFunc   func(key []byte, index uint64)
-	sessionAt uint64
-	maxKeys   uint64
-	streamer  *TestExternalRegistry
-}
-
-func newTestExternalServer(t string, sessionAt, maxKeys uint64, keyFunc func(key []byte, index uint64)) *testExternalServer {
-	if keyFunc == nil {
-		keyFunc = binary.BigEndian.PutUint64
-	}
-	return &testExternalServer{
-		t:         t,
-		keyFunc:   keyFunc,
-		sessionAt: sessionAt,
-		maxKeys:   maxKeys,
-	}
-}
-
-func (s *testExternalServer) SetNextBatch(from uint64, to uint64) ([]byte, uint64, uint64, *HandoverProof, error) {
-	if from == 0 && to == 0 {
-		from = s.sessionAt
-		to = s.sessionAt + testExternalServerBatchSize
-	}
-	if to-from > testExternalServerBatchSize {
-		to = from + testExternalServerBatchSize - 1
-	}
-	if from >= s.maxKeys && to > s.maxKeys {
-		return nil, 0, 0, nil, io.EOF
-	}
-	if to > s.maxKeys {
-		to = s.maxKeys
-	}
-	b := make([]byte, HashSize*(to-from+1))
-	for i := from; i <= to; i++ {
-		s.keyFunc(b[(i-from)*HashSize:(i-from+1)*HashSize], i)
-	}
-	return b, from, to, nil, nil
-}
-
-func (s *testExternalServer) GetData(context.Context, []byte) ([]byte, error) {
-	return make([]byte, 4096), nil
-}
-
-func (s *testExternalServer) Close() {}
-
-// Sets the global value defaultSkipCheck.
-// It should be used in test function defer to reset the global value
-// to the original value.
-//
-// defer setDefaultSkipCheck(defaultSkipCheck)
-// defaultSkipCheck = skipCheck
-//
-// This works as defer function arguments evaluations are evaluated as ususal,
-// but only the function body invocation is deferred.
-func setDefaultSkipCheck(skipCheck bool) {
-	defaultSkipCheck = skipCheck
 }

swarm/network/stream/delivery_test.go

@@ -22,18 +22,19 @@ import (
 	crand "crypto/rand"
 	"fmt"
 	"io"
+	"os"
 	"sync"
 	"testing"
 	"time"
 
-	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/node"
-	"github.com/ethereum/go-ethereum/p2p/discover"
+	"github.com/ethereum/go-ethereum/p2p"
-	"github.com/ethereum/go-ethereum/p2p/simulations"
+	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
 	p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
-	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/ethereum/go-ethereum/swarm/log"
 	"github.com/ethereum/go-ethereum/swarm/network"
-	streamTesting "github.com/ethereum/go-ethereum/swarm/network/stream/testing"
+	"github.com/ethereum/go-ethereum/swarm/network/simulation"
+	"github.com/ethereum/go-ethereum/swarm/state"
 	"github.com/ethereum/go-ethereum/swarm/storage"
 )
 
@@ -308,159 +309,164 @@ func TestDeliveryFromNodes(t *testing.T) {
 }
 
 func testDeliveryFromNodes(t *testing.T, nodes, conns, chunkCount int, skipCheck bool) {
-	defaultSkipCheck = skipCheck
+	sim := simulation.New(map[string]simulation.ServiceFunc{
-	toAddr = network.NewAddrFromNodeID
+		"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
-	createStoreFunc = createTestLocalStorageFromSim
-	conf := &streamTesting.RunConfig{
-		Adapter:         *adapter,
-		NodeCount:       nodes,
-		ConnLevel:       conns,
-		ToAddr:          toAddr,
-		Services:        services,
-		EnableMsgEvents: false,
-	}
 
-	sim, teardown, err := streamTesting.NewSimulation(conf)
+			id := ctx.Config.ID
-	var rpcSubscriptionsWg sync.WaitGroup
+			addr := network.NewAddrFromNodeID(id)
-	defer func() {
+			store, datadir, err := createTestLocalStorageForID(id, addr)
-		rpcSubscriptionsWg.Wait()
-		teardown()
-	}()
 			if err != nil {
-		t.Fatal(err.Error())
+				return nil, nil, err
 			}
-	stores = make(map[discover.NodeID]storage.ChunkStore)
+			bucket.Store(bucketKeyStore, store)
-	for i, id := range sim.IDs {
+			cleanup = func() {
-		stores[id] = sim.Stores[i]
+				os.RemoveAll(datadir)
-	}
+				store.Close()
-	registries = make(map[discover.NodeID]*TestRegistry)
-	deliveries = make(map[discover.NodeID]*Delivery)
-	peerCount = func(id discover.NodeID) int {
-		if sim.IDs[0] == id || sim.IDs[nodes-1] == id {
-			return 1
-		}
-		return 2
 			}
+			localStore := store.(*storage.LocalStore)
+			db := storage.NewDBAPI(localStore)
+			kad := network.NewKademlia(addr.Over(), network.NewKadParams())
+			delivery := NewDelivery(kad, db)
 
-	// here we distribute chunks of a random file into Stores of nodes 1 to nodes
+			r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
-	rrFileStore := storage.NewFileStore(newRoundRobinStore(sim.Stores[1:]...), storage.NewFileStoreParams())
+				SkipCheck: skipCheck,
-	size := chunkCount * chunkSize
-	ctx := context.TODO()
-	fileHash, wait, err := rrFileStore.Store(ctx, io.LimitReader(crand.Reader, int64(size)), int64(size), false)
-	// wait until all chunks stored
-	if err != nil {
-		t.Fatal(err.Error())
-	}
-	err = wait(ctx)
-	if err != nil {
-		t.Fatal(err.Error())
-	}
-	errc := make(chan error, 1)
-	waitPeerErrC = make(chan error)
-	quitC := make(chan struct{})
-	defer close(quitC)
-
-	action := func(ctx context.Context) error {
-		// each node Subscribes to each other's swarmChunkServerStreamName
-		// need to wait till an aynchronous process registers the peers in streamer.peers
-		// that is used by Subscribe
-		// using a global err channel to share betweem action and node service
-		i := 0
-		for err := range waitPeerErrC {
-			if err != nil {
-				return fmt.Errorf("error waiting for peers: %s", err)
-			}
-			i++
-			if i == nodes {
-				break
-			}
-		}
-
-		// each node subscribes to the upstream swarm chunk server stream
-		// which responds to chunk retrieve requests all but the last node in the chain does not
-		for j := 0; j < nodes-1; j++ {
-			id := sim.IDs[j]
-			err := sim.CallClient(id, func(client *rpc.Client) error {
-				doneC, err := streamTesting.WatchDisconnections(id, client, errc, quitC)
-				if err != nil {
-					return err
-				}
-				rpcSubscriptionsWg.Add(1)
-				go func() {
-					<-doneC
-					rpcSubscriptionsWg.Done()
-				}()
-				ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
-				defer cancel()
-				sid := sim.IDs[j+1]
-				return client.CallContext(ctx, nil, "stream_subscribeStream", sid, NewStream(swarmChunkServerStreamName, "", false), NewRange(0, 0), Top)
 			})
-			if err != nil {
+			bucket.Store(bucketKeyRegistry, r)
-				return err
+
-			}
-		}
-		// create a retriever FileStore for the pivot node
-		delivery := deliveries[sim.IDs[0]]
 			retrieveFunc := func(ctx context.Context, chunk *storage.Chunk) error {
 				return delivery.RequestFromPeers(ctx, chunk.Addr[:], skipCheck)
 			}
-		netStore := storage.NewNetStore(sim.Stores[0].(*storage.LocalStore), retrieveFunc)
+			netStore := storage.NewNetStore(localStore, retrieveFunc)
 			fileStore := storage.NewFileStore(netStore, storage.NewFileStoreParams())
+			bucket.Store(bucketKeyFileStore, fileStore)
 
+			return r, cleanup, nil
+
+		},
+	})
+	defer sim.Close()
+
+	log.Info("Adding nodes to simulation")
+	_, err := sim.AddNodesAndConnectChain(nodes)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	log.Info("Starting simulation")
+	ctx := context.Background()
+	result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
+		nodeIDs := sim.UpNodeIDs()
+		//determine the pivot node to be the first node of the simulation
+		sim.SetPivotNode(nodeIDs[0])
+		//distribute chunks of a random file into Stores of nodes 1 to nodes
+		//we will do this by creating a file store with an underlying round-robin store:
+		//the file store will create a hash for the uploaded file, but every chunk will be
+		//distributed to different nodes via round-robin scheduling
+		log.Debug("Writing file to round-robin file store")
+		//to do this, we create an array for chunkstores (length minus one, the pivot node)
+		stores := make([]storage.ChunkStore, len(nodeIDs)-1)
+		//we then need to get all stores from the sim....
+		lStores := sim.NodesItems(bucketKeyStore)
+		i := 0
+		//...iterate the buckets...
+		for id, bucketVal := range lStores {
+			//...and remove the one which is the pivot node
+			if id == *sim.PivotNodeID() {
+				continue
+			}
+			//the other ones are added to the array...
+			stores[i] = bucketVal.(storage.ChunkStore)
+			i++
+		}
+		//...which then gets passed to the round-robin file store
+		roundRobinFileStore := storage.NewFileStore(newRoundRobinStore(stores...), storage.NewFileStoreParams())
+		//now we can actually upload a (random) file to the round-robin store
+		size := chunkCount * chunkSize
+		log.Debug("Storing data to file store")
+		fileHash, wait, err := roundRobinFileStore.Store(ctx, io.LimitReader(crand.Reader, int64(size)), int64(size), false)
+		// wait until all chunks stored
+		if err != nil {
+			return err
+		}
+		err = wait(ctx)
+		if err != nil {
+			return err
+		}
+
+		//each of the nodes (except pivot node) subscribes to the stream of the next node
+		for j, node := range nodeIDs[0 : nodes-1] {
+			sid := nodeIDs[j+1]
+			item, ok := sim.NodeItem(node, bucketKeyRegistry)
+			if !ok {
+				return fmt.Errorf("No registry")
+			}
+			registry := item.(*Registry)
+			err = registry.Subscribe(sid, NewStream(swarmChunkServerStreamName, "", false), NewRange(0, 0), Top)
+			if err != nil {
+				return err
+			}
+		}
+
+		//get the pivot node's filestore
+		item, ok := sim.NodeItem(*sim.PivotNodeID(), bucketKeyFileStore)
+		if !ok {
+			return fmt.Errorf("No filestore")
+		}
+		pivotFileStore := item.(*storage.FileStore)
+		log.Debug("Starting retrieval routine")
 		go func() {
 			// start the retrieval on the pivot node - this will spawn retrieve requests for missing chunks
 			// we must wait for the peer connections to have started before requesting
-			n, err := readAll(fileStore, fileHash)
+			n, err := readAll(pivotFileStore, fileHash)
 			log.Info(fmt.Sprintf("retrieved %v", fileHash), "read", n, "err", err)
 			if err != nil {
-				errc <- fmt.Errorf("requesting chunks action error: %v", err)
+				t.Fatalf("requesting chunks action error: %v", err)
 			}
 		}()
-		return nil
+
-	}
+		log.Debug("Waiting for kademlia")
-	check := func(ctx context.Context, id discover.NodeID) (bool, error) {
+		if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
-		select {
+			return err
-		case err := <-errc:
-			return false, err
-		case <-ctx.Done():
-			return false, ctx.Err()
-		default:
-		}
-		var total int64
-		err := sim.CallClient(id, func(client *rpc.Client) error {
-			ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
-			defer cancel()
-			return client.CallContext(ctx, &total, "stream_readAll", common.BytesToHash(fileHash))
-		})
-		log.Info(fmt.Sprintf("check if %08x is available locally: number of bytes read %v/%v (error: %v)", fileHash, total, size, err))
-		if err != nil || total != int64(size) {
-			return false, nil
-		}
-		return true, nil
 		}
 
-	conf.Step = &simulations.Step{
+		log.Debug("Watching for disconnections")
-		Action:  action,
+		disconnections := sim.PeerEvents(
-		Trigger: streamTesting.Trigger(10*time.Millisecond, quitC, sim.IDs[0]),
+			context.Background(),
-		// we are only testing the pivot node (net.Nodes[0])
+			sim.NodeIDs(),
-		Expect: &simulations.Expectation{
+			simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
-			Nodes: sim.IDs[0:1],
+		)
-			Check: check,
+
-		},
+		go func() {
+			for d := range disconnections {
+				if d.Error != nil {
+					log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
+					t.Fatal(d.Error)
 				}
-	startedAt := time.Now()
+			}
-	timeout := 300 * time.Second
+		}()
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+
-	defer cancel()
+		//finally check that the pivot node gets all chunks via the root hash
-	result, err := sim.Run(ctx, conf)
+		log.Debug("Check retrieval")
-	finishedAt := time.Now()
+		success := true
+		var total int64
+		total, err = readAll(pivotFileStore, fileHash)
 		if err != nil {
-		t.Fatalf("Setting up simulation failed: %v", err)
+			return err
 		}
+		log.Info(fmt.Sprintf("check if %08x is available locally: number of bytes read %v/%v (error: %v)", fileHash, total, size, err))
+		if err != nil || total != int64(size) {
+			success = false
+		}
+
+		if !success {
+			return fmt.Errorf("Test failed, chunks not available on all nodes")
+		}
+		log.Debug("Test terminated successfully")
+		return nil
+	})
 	if result.Error != nil {
-		t.Fatalf("Simulation failed: %s", result.Error)
+		t.Fatal(result.Error)
 	}
-	streamTesting.CheckResult(t, result, startedAt, finishedAt)
 }
 
 func BenchmarkDeliveryFromNodesWithoutCheck(b *testing.B) {
@@ -490,138 +496,86 @@ func BenchmarkDeliveryFromNodesWithCheck(b *testing.B) {
 }
 
 func benchmarkDeliveryFromNodes(b *testing.B, nodes, conns, chunkCount int, skipCheck bool) {
-	defaultSkipCheck = skipCheck
+	sim := simulation.New(map[string]simulation.ServiceFunc{
-	toAddr = network.NewAddrFromNodeID
+		"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
-	createStoreFunc = createTestLocalStorageFromSim
-	registries = make(map[discover.NodeID]*TestRegistry)
 
-	timeout := 300 * time.Second
+			id := ctx.Config.ID
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+			addr := network.NewAddrFromNodeID(id)
-	defer cancel()
+			store, datadir, err := createTestLocalStorageForID(id, addr)
-
-	conf := &streamTesting.RunConfig{
-		Adapter:         *adapter,
-		NodeCount:       nodes,
-		ConnLevel:       conns,
-		ToAddr:          toAddr,
-		Services:        services,
-		EnableMsgEvents: false,
-	}
-	sim, teardown, err := streamTesting.NewSimulation(conf)
-	var rpcSubscriptionsWg sync.WaitGroup
-	defer func() {
-		rpcSubscriptionsWg.Wait()
-		teardown()
-	}()
 			if err != nil {
-		b.Fatal(err.Error())
+				return nil, nil, err
 			}
+			bucket.Store(bucketKeyStore, store)
+			cleanup = func() {
+				os.RemoveAll(datadir)
+				store.Close()
+			}
+			localStore := store.(*storage.LocalStore)
+			db := storage.NewDBAPI(localStore)
+			kad := network.NewKademlia(addr.Over(), network.NewKadParams())
+			delivery := NewDelivery(kad, db)
 
-	stores = make(map[discover.NodeID]storage.ChunkStore)
+			r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
-	deliveries = make(map[discover.NodeID]*Delivery)
+				SkipCheck:       skipCheck,
-	for i, id := range sim.IDs {
+				DoSync:          true,
-		stores[id] = sim.Stores[i]
+				SyncUpdateDelay: 0,
-	}
-	peerCount = func(id discover.NodeID) int {
-		if sim.IDs[0] == id || sim.IDs[nodes-1] == id {
-			return 1
-		}
-		return 2
-	}
-	// wait channel for all nodes all peer connections to set up
-	waitPeerErrC = make(chan error)
-
-	// create a FileStore for the last node in the chain which we are gonna write to
-	remoteFileStore := storage.NewFileStore(sim.Stores[nodes-1], storage.NewFileStoreParams())
-
-	// channel to signal simulation initialisation with action call complete
-	// or node disconnections
-	disconnectC := make(chan error)
-	quitC := make(chan struct{})
-
-	initC := make(chan error)
-
-	action := func(ctx context.Context) error {
-		// each node Subscribes to each other's swarmChunkServerStreamName
-		// need to wait till an aynchronous process registers the peers in streamer.peers
-		// that is used by Subscribe
-		// waitPeerErrC using a global err channel to share betweem action and node service
-		i := 0
-		for err := range waitPeerErrC {
-			if err != nil {
-				return fmt.Errorf("error waiting for peers: %s", err)
-			}
-			i++
-			if i == nodes {
-				break
-			}
-		}
-		var err error
-		// each node except the last one subscribes to the upstream swarm chunk server stream
-		// which responds to chunk retrieve requests
-		for j := 0; j < nodes-1; j++ {
-			id := sim.IDs[j]
-			err = sim.CallClient(id, func(client *rpc.Client) error {
-				doneC, err := streamTesting.WatchDisconnections(id, client, disconnectC, quitC)
-				if err != nil {
-					return err
-				}
-				rpcSubscriptionsWg.Add(1)
-				go func() {
-					<-doneC
-					rpcSubscriptionsWg.Done()
-				}()
-				ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
-				defer cancel()
-				sid := sim.IDs[j+1] // the upstream peer's id
-				return client.CallContext(ctx, nil, "stream_subscribeStream", sid, NewStream(swarmChunkServerStreamName, "", false), NewRange(0, 0), Top)
 			})
-			if err != nil {
-				break
-			}
-		}
-		initC <- err
-		return nil
-	}
 
-	// the check function is only triggered when the benchmark finishes
-	trigger := make(chan discover.NodeID)
-	check := func(ctx context.Context, id discover.NodeID) (_ bool, err error) {
-		return true, nil
-	}
-
-	conf.Step = &simulations.Step{
-		Action:  action,
-		Trigger: trigger,
-		// we are only testing the pivot node (net.Nodes[0])
-		Expect: &simulations.Expectation{
-			Nodes: sim.IDs[0:1],
-			Check: check,
-		},
-	}
-
-	// run the simulation in the background
-	errc := make(chan error)
-	go func() {
-		_, err := sim.Run(ctx, conf)
-		close(quitC)
-		errc <- err
-	}()
-
-	// wait for simulation action to complete stream subscriptions
-	err = <-initC
-	if err != nil {
-		b.Fatalf("simulation failed to initialise. expected no error. got %v", err)
-	}
-
-	// create a retriever FileStore for the pivot node
-	// by now deliveries are set for each node by the streamer service
-	delivery := deliveries[sim.IDs[0]]
 			retrieveFunc := func(ctx context.Context, chunk *storage.Chunk) error {
 				return delivery.RequestFromPeers(ctx, chunk.Addr[:], skipCheck)
 			}
-	netStore := storage.NewNetStore(sim.Stores[0].(*storage.LocalStore), retrieveFunc)
+			netStore := storage.NewNetStore(localStore, retrieveFunc)
+			fileStore := storage.NewFileStore(netStore, storage.NewFileStoreParams())
+			bucket.Store(bucketKeyFileStore, fileStore)
 
+			return r, cleanup, nil
+
+		},
+	})
+	defer sim.Close()
+
+	log.Info("Initializing test config")
+	_, err := sim.AddNodesAndConnectChain(nodes)
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	ctx := context.Background()
+	result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
+		nodeIDs := sim.UpNodeIDs()
+		node := nodeIDs[len(nodeIDs)-1]
+
+		item, ok := sim.NodeItem(node, bucketKeyFileStore)
+		if !ok {
+			b.Fatal("No filestore")
+		}
+		remoteFileStore := item.(*storage.FileStore)
+
+		pivotNode := nodeIDs[0]
+		item, ok = sim.NodeItem(pivotNode, bucketKeyNetStore)
+		if !ok {
+			b.Fatal("No filestore")
+		}
+		netStore := item.(*storage.NetStore)
+
+		if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
+			return err
+		}
+
+		disconnections := sim.PeerEvents(
+			context.Background(),
+			sim.NodeIDs(),
+			simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
+		)
+
+		go func() {
+			for d := range disconnections {
+				if d.Error != nil {
+					log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
+					b.Fatal(d.Error)
+				}
+			}
+		}()
 		// benchmark loop
 		b.ResetTimer()
 		b.StopTimer()
@@ -670,38 +624,18 @@ Loop:
 			}
 			b.StopTimer()
 
-		select {
-		case err = <-disconnectC:
-			if err != nil {
-				break Loop
-			}
-		default:
-		}
-
 			if misses > 0 {
 				err = fmt.Errorf("%v chunk not found out of %v", misses, total)
 				break Loop
 			}
 		}
-
-	select {
-	case <-quitC:
-	case trigger <- sim.IDs[0]:
-	}
-	if err == nil {
-		err = <-errc
-	} else {
-		if e := <-errc; e != nil {
-			b.Errorf("sim.Run function error: %v", e)
-		}
-	}
-
-	// benchmark over, trigger the check function to conclude the simulation
 		if err != nil {
-		b.Fatalf("expected no error. got %v", err)
+			b.Fatal(err)
 		}
+		return nil
+	})
+	if result.Error != nil {
+		b.Fatal(result.Error)
 	}
 
-func createTestLocalStorageFromSim(id discover.NodeID, addr *network.BzzAddr) (storage.ChunkStore, error) {
-	return stores[id], nil
 }

swarm/network/stream/intervals_test.go

@@ -22,52 +22,22 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
+	"os"
 	"sync"
 	"testing"
 	"time"
 
+	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/node"
+	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/p2p/discover"
-	"github.com/ethereum/go-ethereum/p2p/simulations"
 	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
-	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/ethereum/go-ethereum/swarm/network"
-	streamTesting "github.com/ethereum/go-ethereum/swarm/network/stream/testing"
+	"github.com/ethereum/go-ethereum/swarm/network/simulation"
 	"github.com/ethereum/go-ethereum/swarm/state"
 	"github.com/ethereum/go-ethereum/swarm/storage"
 )
 
-var (
-	externalStreamName             = "externalStream"
-	externalStreamSessionAt uint64 = 50
-	externalStreamMaxKeys   uint64 = 100
-)
-
-func newIntervalsStreamerService(ctx *adapters.ServiceContext) (node.Service, error) {
-	id := ctx.Config.ID
-	addr := toAddr(id)
-	kad := network.NewKademlia(addr.Over(), network.NewKadParams())
-	store := stores[id].(*storage.LocalStore)
-	db := storage.NewDBAPI(store)
-	delivery := NewDelivery(kad, db)
-	deliveries[id] = delivery
-	r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
-		SkipCheck: defaultSkipCheck,
-	})
-
-	r.RegisterClientFunc(externalStreamName, func(p *Peer, t string, live bool) (Client, error) {
-		return newTestExternalClient(db), nil
-	})
-	r.RegisterServerFunc(externalStreamName, func(p *Peer, t string, live bool) (Server, error) {
-		return newTestExternalServer(t, externalStreamSessionAt, externalStreamMaxKeys, nil), nil
-	})
-
-	go func() {
-		waitPeerErrC <- waitForPeers(r, 1*time.Second, peerCount(id))
-	}()
-	return &TestExternalRegistry{r}, nil
-}
-
 func TestIntervals(t *testing.T) {
 	testIntervals(t, true, nil, false)
 	testIntervals(t, false, NewRange(9, 26), false)
@@ -81,95 +51,112 @@ func TestIntervals(t *testing.T) {
 func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
 	nodes := 2
 	chunkCount := dataChunkCount
+	externalStreamName := "externalStream"
+	externalStreamSessionAt := uint64(50)
+	externalStreamMaxKeys := uint64(100)
 
-	defer setDefaultSkipCheck(defaultSkipCheck)
+	sim := simulation.New(map[string]simulation.ServiceFunc{
-	defaultSkipCheck = skipCheck
+		"intervalsStreamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
 
-	toAddr = network.NewAddrFromNodeID
+			id := ctx.Config.ID
-	conf := &streamTesting.RunConfig{
+			addr := network.NewAddrFromNodeID(id)
-		Adapter:        *adapter,
+			store, datadir, err := createTestLocalStorageForID(id, addr)
-		NodeCount:      nodes,
+			if err != nil {
-		ConnLevel:      1,
+				return nil, nil, err
-		ToAddr:         toAddr,
-		Services:       services,
-		DefaultService: "intervalsStreamer",
 			}
+			bucket.Store(bucketKeyStore, store)
+			cleanup = func() {
+				store.Close()
+				os.RemoveAll(datadir)
+			}
+			localStore := store.(*storage.LocalStore)
+			db := storage.NewDBAPI(localStore)
+			kad := network.NewKademlia(addr.Over(), network.NewKadParams())
+			delivery := NewDelivery(kad, db)
 
-	sim, teardown, err := streamTesting.NewSimulation(conf)
+			r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
-	var rpcSubscriptionsWg sync.WaitGroup
+				SkipCheck: skipCheck,
-	defer func() {
+			})
-		rpcSubscriptionsWg.Wait()
+			bucket.Store(bucketKeyRegistry, r)
-		teardown()
+
-	}()
+			r.RegisterClientFunc(externalStreamName, func(p *Peer, t string, live bool) (Client, error) {
+				return newTestExternalClient(db), nil
+			})
+			r.RegisterServerFunc(externalStreamName, func(p *Peer, t string, live bool) (Server, error) {
+				return newTestExternalServer(t, externalStreamSessionAt, externalStreamMaxKeys, nil), nil
+			})
+
+			fileStore := storage.NewFileStore(localStore, storage.NewFileStoreParams())
+			bucket.Store(bucketKeyFileStore, fileStore)
+
+			return r, cleanup, nil
+
+		},
+	})
+	defer sim.Close()
+
+	log.Info("Adding nodes to simulation")
+	_, err := sim.AddNodesAndConnectChain(nodes)
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	stores = make(map[discover.NodeID]storage.ChunkStore)
+	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Second)
-	deliveries = make(map[discover.NodeID]*Delivery)
+	defer cancel()
-	for i, id := range sim.IDs {
-		stores[id] = sim.Stores[i]
-	}
 
-	peerCount = func(id discover.NodeID) int {
+	result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
-		return 1
+		nodeIDs := sim.UpNodeIDs()
-	}
+		storer := nodeIDs[0]
+		checker := nodeIDs[1]
+
+		item, ok := sim.NodeItem(storer, bucketKeyFileStore)
+		if !ok {
+			return fmt.Errorf("No filestore")
+		}
+		fileStore := item.(*storage.FileStore)
 
-	fileStore := storage.NewFileStore(sim.Stores[0], storage.NewFileStoreParams())
 		size := chunkCount * chunkSize
-	ctx := context.TODO()
 		_, wait, err := fileStore.Store(ctx, io.LimitReader(crand.Reader, int64(size)), int64(size), false)
 		if err != nil {
+			log.Error("Store error: %v", "err", err)
 			t.Fatal(err)
 		}
 		err = wait(ctx)
 		if err != nil {
+			log.Error("Wait error: %v", "err", err)
 			t.Fatal(err)
 		}
 
-	errc := make(chan error, 1)
+		item, ok = sim.NodeItem(checker, bucketKeyRegistry)
-	waitPeerErrC = make(chan error)
+		if !ok {
-	quitC := make(chan struct{})
+			return fmt.Errorf("No registry")
-	defer close(quitC)
-
-	action := func(ctx context.Context) error {
-		i := 0
-		for err := range waitPeerErrC {
-			if err != nil {
-				return fmt.Errorf("error waiting for peers: %s", err)
-			}
-			i++
-			if i == nodes {
-				break
-			}
-		}
-
-		id := sim.IDs[1]
-
-		err := sim.CallClient(id, func(client *rpc.Client) error {
-
-			sid := sim.IDs[0]
-
-			doneC, err := streamTesting.WatchDisconnections(id, client, errc, quitC)
-			if err != nil {
-				return err
-			}
-			rpcSubscriptionsWg.Add(1)
-			go func() {
-				<-doneC
-				rpcSubscriptionsWg.Done()
-			}()
-			ctx, cancel := context.WithTimeout(ctx, 100*time.Second)
-			defer cancel()
-
-			err = client.CallContext(ctx, nil, "stream_subscribeStream", sid, NewStream(externalStreamName, "", live), history, Top)
-			if err != nil {
-				return err
 		}
+		registry := item.(*Registry)
 
 		liveErrC := make(chan error)
 		historyErrC := make(chan error)
 
+		if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
+			log.Error("WaitKademlia error: %v", "err", err)
+			return err
+		}
+
+		log.Debug("Watching for disconnections")
+		disconnections := sim.PeerEvents(
+			context.Background(),
+			sim.NodeIDs(),
+			simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
+		)
+
+		go func() {
+			for d := range disconnections {
+				if d.Error != nil {
+					log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
+					t.Fatal(d.Error)
+				}
+			}
+		}()
+
 		go func() {
 			if !live {
 				close(liveErrC)
@@ -182,17 +169,16 @@ func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
 			}()
 
 			// live stream
-				liveHashesChan := make(chan []byte)
+			var liveHashesChan chan []byte
-				liveSubscription, err := client.Subscribe(ctx, "stream", liveHashesChan, "getHashes", sid, NewStream(externalStreamName, "", true))
+			liveHashesChan, err = getHashes(ctx, registry, storer, NewStream(externalStreamName, "", true))
 			if err != nil {
+				log.Error("Subscription error: %v", "err", err)
 				return
 			}
-				defer liveSubscription.Unsubscribe()
-
 			i := externalStreamSessionAt
 
 			// we have subscribed, enable notifications
-				err = client.CallContext(ctx, nil, "stream_enableNotifications", sid, NewStream(externalStreamName, "", true))
+			err = enableNotifications(registry, storer, NewStream(externalStreamName, "", true))
 			if err != nil {
 				return
 			}
@@ -209,8 +195,6 @@ func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
 					if i > externalStreamMaxKeys {
 						return
 					}
-					case err = <-liveSubscription.Err():
-						return
 				case <-ctx.Done():
 					return
 				}
@@ -229,12 +213,11 @@ func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
 			}()
 
 			// history stream
-				historyHashesChan := make(chan []byte)
+			var historyHashesChan chan []byte
-				historySubscription, err := client.Subscribe(ctx, "stream", historyHashesChan, "getHashes", sid, NewStream(externalStreamName, "", false))
+			historyHashesChan, err = getHashes(ctx, registry, storer, NewStream(externalStreamName, "", false))
 			if err != nil {
 				return
 			}
-				defer historySubscription.Unsubscribe()
 
 			var i uint64
 			historyTo := externalStreamMaxKeys
@@ -246,7 +229,7 @@ func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
 			}
 
 			// we have subscribed, enable notifications
-				err = client.CallContext(ctx, nil, "stream_enableNotifications", sid, NewStream(externalStreamName, "", false))
+			err = enableNotifications(registry, storer, NewStream(externalStreamName, "", false))
 			if err != nil {
 				return
 			}
@@ -263,14 +246,16 @@ func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
 					if i > historyTo {
 						return
 					}
-					case err = <-historySubscription.Err():
-						return
 				case <-ctx.Done():
 					return
 				}
 			}
 		}()
 
+		err = registry.Subscribe(storer, NewStream(externalStreamName, "", live), history, Top)
+		if err != nil {
+			return err
+		}
 		if err := <-liveErrC; err != nil {
 			return err
 		}
@@ -280,38 +265,123 @@ func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
 
 		return nil
 	})
-		return err
+
+	if result.Error != nil {
+		t.Fatal(result.Error)
 	}
-	check := func(ctx context.Context, id discover.NodeID) (bool, error) {
-		select {
-		case err := <-errc:
-			return false, err
-		case <-ctx.Done():
-			return false, ctx.Err()
-		default:
-		}
-		return true, nil
 }
 
-	conf.Step = &simulations.Step{
+func getHashes(ctx context.Context, r *Registry, peerID discover.NodeID, s Stream) (chan []byte, error) {
-		Action:  action,
+	peer := r.getPeer(peerID)
-		Trigger: streamTesting.Trigger(10*time.Millisecond, quitC, sim.IDs[0]),
+
-		Expect: &simulations.Expectation{
+	client, err := peer.getClient(ctx, s)
-			Nodes: sim.IDs[1:1],
-			Check: check,
-		},
-	}
-	startedAt := time.Now()
-	timeout := 300 * time.Second
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
-	defer cancel()
-	result, err := sim.Run(ctx, conf)
-	finishedAt := time.Now()
 	if err != nil {
-		t.Fatalf("Setting up simulation failed: %v", err)
+		return nil, err
 	}
-	if result.Error != nil {
+
-		t.Fatalf("Simulation failed: %s", result.Error)
+	c := client.Client.(*testExternalClient)
+
+	return c.hashes, nil
 }
-	streamTesting.CheckResult(t, result, startedAt, finishedAt)
+
+func enableNotifications(r *Registry, peerID discover.NodeID, s Stream) error {
+	peer := r.getPeer(peerID)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	client, err := peer.getClient(ctx, s)
+	if err != nil {
+		return err
 	}
+
+	close(client.Client.(*testExternalClient).enableNotificationsC)
+
+	return nil
+}
+
+type testExternalClient struct {
+	hashes               chan []byte
+	db                   *storage.DBAPI
+	enableNotificationsC chan struct{}
+}
+
+func newTestExternalClient(db *storage.DBAPI) *testExternalClient {
+	return &testExternalClient{
+		hashes:               make(chan []byte),
+		db:                   db,
+		enableNotificationsC: make(chan struct{}),
+	}
+}
+
+func (c *testExternalClient) NeedData(ctx context.Context, hash []byte) func() {
+	chunk, _ := c.db.GetOrCreateRequest(ctx, hash)
+	if chunk.ReqC == nil {
+		return nil
+	}
+	c.hashes <- hash
+	//NOTE: This was failing on go1.9.x with a deadlock.
+	//Sometimes this function would just block
+	//It is commented now, but it may be well worth after the chunk refactor
+	//to re-enable this and see if the problem has been addressed
+	/*
+		return func() {
+			return chunk.WaitToStore()
+		}
+	*/
+	return nil
+}
+
+func (c *testExternalClient) BatchDone(Stream, uint64, []byte, []byte) func() (*TakeoverProof, error) {
+	return nil
+}
+
+func (c *testExternalClient) Close() {}
+
+const testExternalServerBatchSize = 10
+
+type testExternalServer struct {
+	t         string
+	keyFunc   func(key []byte, index uint64)
+	sessionAt uint64
+	maxKeys   uint64
+}
+
+func newTestExternalServer(t string, sessionAt, maxKeys uint64, keyFunc func(key []byte, index uint64)) *testExternalServer {
+	if keyFunc == nil {
+		keyFunc = binary.BigEndian.PutUint64
+	}
+	return &testExternalServer{
+		t:         t,
+		keyFunc:   keyFunc,
+		sessionAt: sessionAt,
+		maxKeys:   maxKeys,
+	}
+}
+
+func (s *testExternalServer) SetNextBatch(from uint64, to uint64) ([]byte, uint64, uint64, *HandoverProof, error) {
+	if from == 0 && to == 0 {
+		from = s.sessionAt
+		to = s.sessionAt + testExternalServerBatchSize
+	}
+	if to-from > testExternalServerBatchSize {
+		to = from + testExternalServerBatchSize - 1
+	}
+	if from >= s.maxKeys && to > s.maxKeys {
+		return nil, 0, 0, nil, io.EOF
+	}
+	if to > s.maxKeys {
+		to = s.maxKeys
+	}
+	b := make([]byte, HashSize*(to-from+1))
+	for i := from; i <= to; i++ {
+		s.keyFunc(b[(i-from)*HashSize:(i-from+1)*HashSize], i)
+	}
+	return b, from, to, nil, nil
+}
+
+func (s *testExternalServer) GetData(context.Context, []byte) ([]byte, error) {
+	return make([]byte, 4096), nil
+}
+
+func (s *testExternalServer) Close() {}

swarm/network/stream/snapshot_retrieval_test.go

@@ -17,20 +17,19 @@ package stream
 
 import (
 	"context"
-	crand "crypto/rand"
 	"fmt"
-	"math/rand"
+	"os"
-	"strings"
 	"sync"
 	"testing"
 	"time"
 
-	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/node"
 	"github.com/ethereum/go-ethereum/p2p/discover"
-	"github.com/ethereum/go-ethereum/p2p/simulations"
+	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
 	"github.com/ethereum/go-ethereum/swarm/log"
 	"github.com/ethereum/go-ethereum/swarm/network"
-	streamTesting "github.com/ethereum/go-ethereum/swarm/network/stream/testing"
+	"github.com/ethereum/go-ethereum/swarm/network/simulation"
+	"github.com/ethereum/go-ethereum/swarm/state"
 	"github.com/ethereum/go-ethereum/swarm/storage"
 )
 
@@ -40,40 +39,6 @@ const (
 	maxFileSize = 40
 )
 
-func initRetrievalTest() {
-	//global func to get overlay address from discover ID
-	toAddr = func(id discover.NodeID) *network.BzzAddr {
-		addr := network.NewAddrFromNodeID(id)
-		return addr
-	}
-	//global func to create local store
-	createStoreFunc = createTestLocalStorageForId
-	//local stores
-	stores = make(map[discover.NodeID]storage.ChunkStore)
-	//data directories for each node and store
-	datadirs = make(map[discover.NodeID]string)
-	//deliveries for each node
-	deliveries = make(map[discover.NodeID]*Delivery)
-	//global retrieve func
-	getRetrieveFunc = func(id discover.NodeID) func(ctx context.Context, chunk *storage.Chunk) error {
-		return func(ctx context.Context, chunk *storage.Chunk) error {
-			skipCheck := true
-			return deliveries[id].RequestFromPeers(ctx, chunk.Addr[:], skipCheck)
-		}
-	}
-	//registries, map of discover.NodeID to its streamer
-	registries = make(map[discover.NodeID]*TestRegistry)
-	//not needed for this test but required from common_test for NewStreamService
-	waitPeerErrC = make(chan error)
-	//also not needed for this test but required for NewStreamService
-	peerCount = func(id discover.NodeID) int {
-		if ids[0] == id || ids[len(ids)-1] == id {
-			return 1
-		}
-		return 2
-	}
-}
-
 //This test is a retrieval test for nodes.
 //A configurable number of nodes can be
 //provided to the test.
@@ -81,7 +46,10 @@ func initRetrievalTest() {
 //Number of nodes can be provided via commandline too.
 func TestFileRetrieval(t *testing.T) {
 	if *nodes != 0 {
-		fileRetrievalTest(t, *nodes)
+		err := runFileRetrievalTest(*nodes)
+		if err != nil {
+			t.Fatal(err)
+		}
 	} else {
 		nodeCnt := []int{16}
 		//if the `longrunning` flag has been provided
@@ -90,7 +58,10 @@ func TestFileRetrieval(t *testing.T) {
 			nodeCnt = append(nodeCnt, 32, 64, 128)
 		}
 		for _, n := range nodeCnt {
-			fileRetrievalTest(t, n)
+			err := runFileRetrievalTest(n)
+			if err != nil {
+				t.Fatal(err)
+			}
 		}
 	}
 }
@@ -105,7 +76,10 @@ func TestRetrieval(t *testing.T) {
 	//if nodes/chunks have been provided via commandline,
 	//run the tests with these values
 	if *nodes != 0 && *chunks != 0 {
-		retrievalTest(t, *chunks, *nodes)
+		err := runRetrievalTest(*chunks, *nodes)
+		if err != nil {
+			t.Fatal(err)
+		}
 	} else {
 		var nodeCnt []int
 		var chnkCnt []int
@@ -121,76 +95,17 @@ func TestRetrieval(t *testing.T) {
 		}
 		for _, n := range nodeCnt {
 			for _, c := range chnkCnt {
-				retrievalTest(t, c, n)
+				err := runRetrievalTest(c, n)
-			}
-		}
-	}
-}
-
-//Every test runs 3 times, a live, a history, and a live AND history
-func fileRetrievalTest(t *testing.T, nodeCount int) {
-	//test live and NO history
-	log.Info("Testing live and no history", "nodeCount", nodeCount)
-	live = true
-	history = false
-	err := runFileRetrievalTest(nodeCount)
-	if err != nil {
-		t.Fatal(err)
-	}
-	//test history only
-	log.Info("Testing history only", "nodeCount", nodeCount)
-	live = false
-	history = true
-	err = runFileRetrievalTest(nodeCount)
-	if err != nil {
-		t.Fatal(err)
-	}
-	//finally test live and history
-	log.Info("Testing live and history", "nodeCount", nodeCount)
-	live = true
-	err = runFileRetrievalTest(nodeCount)
 				if err != nil {
 					t.Fatal(err)
 				}
 			}
-
-//Every test runs 3 times, a live, a history, and a live AND history
-func retrievalTest(t *testing.T, chunkCount int, nodeCount int) {
-	//test live and NO history
-	log.Info("Testing live and no history", "chunkCount", chunkCount, "nodeCount", nodeCount)
-	live = true
-	history = false
-	err := runRetrievalTest(chunkCount, nodeCount)
-	if err != nil {
-		t.Fatal(err)
 		}
-	//test history only
-	log.Info("Testing history only", "chunkCount", chunkCount, "nodeCount", nodeCount)
-	live = false
-	history = true
-	err = runRetrievalTest(chunkCount, nodeCount)
-	if err != nil {
-		t.Fatal(err)
-	}
-	//finally test live and history
-	log.Info("Testing live and history", "chunkCount", chunkCount, "nodeCount", nodeCount)
-	live = true
-	err = runRetrievalTest(chunkCount, nodeCount)
-	if err != nil {
-		t.Fatal(err)
 	}
 }
 
 /*
 
-The upload is done by dependency to the global
-`live` and `history` variables;
-
-If `live` is set, first stream subscriptions are established,
-then files are uploaded to nodes.
-
-If `history` is enabled, first upload files, then build up subscriptions.
-
 The test loads a snapshot file to construct the swarm network,
 assuming that the snapshot file identifies a healthy
 kademlia network. Nevertheless a health check runs in the
@@ -199,261 +114,129 @@ simulation's `action` function.
 The snapshot should have 'streamer' in its service list.
 */
 func runFileRetrievalTest(nodeCount int) error {
-	//for every run (live, history), int the variables
+	sim := simulation.New(map[string]simulation.ServiceFunc{
-	initRetrievalTest()
+		"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
-	//the ids of the snapshot nodes, initiate only now as we need nodeCount
+
-	ids = make([]discover.NodeID, nodeCount)
+			id := ctx.Config.ID
-	//channel to check for disconnection errors
+			addr := network.NewAddrFromNodeID(id)
-	disconnectC := make(chan error)
+			store, datadir, err := createTestLocalStorageForID(id, addr)
-	//channel to close disconnection watcher routine
+			if err != nil {
-	quitC := make(chan struct{})
+				return nil, nil, err
-	//the test conf (using same as in `snapshot_sync_test`
+			}
-	conf = &synctestConfig{}
+			bucket.Store(bucketKeyStore, store)
+			cleanup = func() {
+				os.RemoveAll(datadir)
+				store.Close()
+			}
+			localStore := store.(*storage.LocalStore)
+			db := storage.NewDBAPI(localStore)
+			kad := network.NewKademlia(addr.Over(), network.NewKadParams())
+			delivery := NewDelivery(kad, db)
+
+			r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
+				DoSync:          true,
+				SyncUpdateDelay: 3 * time.Second,
+			})
+
+			fileStore := storage.NewFileStore(storage.NewNetStore(localStore, nil), storage.NewFileStoreParams())
+			bucket.Store(bucketKeyFileStore, fileStore)
+
+			return r, cleanup, nil
+
+		},
+	})
+	defer sim.Close()
+
+	log.Info("Initializing test config")
+
+	conf := &synctestConfig{}
+	//map of discover ID to indexes of chunks expected at that ID
+	conf.idToChunksMap = make(map[discover.NodeID][]int)
 	//map of overlay address to discover ID
-	conf.addrToIdMap = make(map[string]discover.NodeID)
+	conf.addrToIDMap = make(map[string]discover.NodeID)
 	//array where the generated chunk hashes will be stored
 	conf.hashes = make([]storage.Address, 0)
-	//load nodes from the snapshot file
+
-	net, err := initNetWithSnapshot(nodeCount)
+	err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
 	if err != nil {
 		return err
 	}
-	var rpcSubscriptionsWg sync.WaitGroup
+
-	//do cleanup after test is terminated
+	ctx, cancelSimRun := context.WithTimeout(context.Background(), 1*time.Minute)
-	defer func() {
+	defer cancelSimRun()
-		//shutdown the snapshot network
+
-		net.Shutdown()
+	result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
-		//after the test, clean up local stores initialized with createLocalStoreForId
+		nodeIDs := sim.UpNodeIDs()
-		localStoreCleanup()
+		for _, n := range nodeIDs {
-		//finally clear all data directories
+			//get the kademlia overlay address from this ID
-		datadirsCleanup()
+			a := network.ToOverlayAddr(n.Bytes())
-	}()
-	//get the nodes of the network
-	nodes := net.GetNodes()
-	//iterate over all nodes...
-	for c := 0; c < len(nodes); c++ {
-		//create an array of discovery nodeIDS
-		ids[c] = nodes[c].ID()
-		a := network.ToOverlayAddr(ids[c].Bytes())
 			//append it to the array of all overlay addresses
 			conf.addrs = append(conf.addrs, a)
-		conf.addrToIdMap[string(a)] = ids[c]
+			//the proximity calculation is on overlay addr,
+			//the p2p/simulations check func triggers on discover.NodeID,
+			//so we need to know which overlay addr maps to which nodeID
+			conf.addrToIDMap[string(a)] = n
 		}
 
-	//needed for healthy call
-	ppmap = network.NewPeerPotMap(testMinProxBinSize, conf.addrs)
-
 		//an array for the random files
 		var randomFiles []string
 		//channel to signal when the upload has finished
-	uploadFinished := make(chan struct{})
+		//uploadFinished := make(chan struct{})
 		//channel to trigger new node checks
-	trigger := make(chan discover.NodeID)
-	//simulation action
-	action := func(ctx context.Context) error {
-		//first run the health check on all nodes,
-		//wait until nodes are all healthy
-		ticker := time.NewTicker(200 * time.Millisecond)
-		defer ticker.Stop()
-		for range ticker.C {
-			healthy := true
-			for _, id := range ids {
-				r := registries[id]
-				//PeerPot for this node
-				addr := common.Bytes2Hex(r.addr.OAddr)
-				pp := ppmap[addr]
-				//call Healthy RPC
-				h := r.delivery.overlay.Healthy(pp)
-				//print info
-				log.Debug(r.delivery.overlay.String())
-				log.Debug(fmt.Sprintf("IS HEALTHY: %t", h.GotNN && h.KnowNN && h.Full))
-				if !h.GotNN || !h.Full {
-					healthy = false
-					break
-				}
-			}
-			if healthy {
-				break
-			}
-		}
 
-		if history {
+		conf.hashes, randomFiles, err = uploadFilesToNodes(sim)
-			log.Info("Uploading for history")
-			//If testing only history, we upload the chunk(s) first
-			conf.hashes, randomFiles, err = uploadFilesToNodes(nodes)
 		if err != nil {
 			return err
 		}
-		}
+		if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
-
-		//variables needed to wait for all subscriptions established before uploading
-		errc := make(chan error)
-
-		//now setup and start event watching in order to know when we can upload
-		ctx, watchCancel := context.WithTimeout(context.Background(), MaxTimeout*time.Second)
-		defer watchCancel()
-
-		log.Info("Setting up stream subscription")
-		//We need two iterations, one to subscribe to the subscription events
-		//(so we know when setup phase is finished), and one to
-		//actually run the stream subscriptions. We can't do it in the same iteration,
-		//because while the first nodes in the loop are setting up subscriptions,
-		//the latter ones have not subscribed to listen to peer events yet,
-		//and then we miss events.
-
-		//first iteration: setup disconnection watcher and subscribe to peer events
-		for j, id := range ids {
-			log.Trace(fmt.Sprintf("Subscribe to subscription events: %d", j))
-			client, err := net.GetNode(id).Client()
-			if err != nil {
 			return err
 		}
-			wsDoneC := watchSubscriptionEvents(ctx, id, client, errc, quitC)
-			// doneC is nil, the error happened which is sent to errc channel, already
-			if wsDoneC == nil {
-				continue
-			}
-			rpcSubscriptionsWg.Add(1)
-			go func() {
-				<-wsDoneC
-				rpcSubscriptionsWg.Done()
-			}()
-
-			//watch for peers disconnecting
-			wdDoneC, err := streamTesting.WatchDisconnections(id, client, disconnectC, quitC)
-			if err != nil {
-				return err
-			}
-			rpcSubscriptionsWg.Add(1)
-			go func() {
-				<-wdDoneC
-				rpcSubscriptionsWg.Done()
-			}()
-		}
-
-		//second iteration: start syncing and setup stream subscriptions
-		for j, id := range ids {
-			log.Trace(fmt.Sprintf("Start syncing and stream subscriptions: %d", j))
-			client, err := net.GetNode(id).Client()
-			if err != nil {
-				return err
-			}
-			//start syncing!
-			var cnt int
-			err = client.CallContext(ctx, &cnt, "stream_startSyncing")
-			if err != nil {
-				return err
-			}
-			//increment the number of subscriptions we need to wait for
-			//by the count returned from startSyncing (SYNC subscriptions)
-			subscriptionCount += cnt
-			//now also add the number of RETRIEVAL_REQUEST subscriptions
-			for snid := range registries[id].peers {
-				subscriptionCount++
-				err = client.CallContext(ctx, nil, "stream_subscribeStream", snid, NewStream(swarmChunkServerStreamName, "", false), nil, Top)
-				if err != nil {
-					return err
-				}
-			}
-		}
-
-		//now wait until the number of expected subscriptions has been finished
-		//`watchSubscriptionEvents` will write with a `nil` value to errc
-		//every time a `SubscriptionMsg` has been received
-		for err := range errc {
-			if err != nil {
-				return err
-			}
-			//`nil` received, decrement count
-			subscriptionCount--
-			//all subscriptions received
-			if subscriptionCount == 0 {
-				break
-			}
-		}
-
-		log.Info("Stream subscriptions successfully requested, action terminated")
-
-		if live {
-			//upload generated files to nodes
-			var hashes []storage.Address
-			var rfiles []string
-			hashes, rfiles, err = uploadFilesToNodes(nodes)
-			if err != nil {
-				return err
-			}
-			conf.hashes = append(conf.hashes, hashes...)
-			randomFiles = append(randomFiles, rfiles...)
-			//signal to the trigger loop that the upload has finished
-			uploadFinished <- struct{}{}
-		}
-
-		return nil
-	}
-
-	//check defines what will be checked during the test
-	check := func(ctx context.Context, id discover.NodeID) (bool, error) {
-
-		select {
-		case <-ctx.Done():
-			return false, ctx.Err()
-		case e := <-disconnectC:
-			log.Error(e.Error())
-			return false, fmt.Errorf("Disconnect event detected, network unhealthy")
-		default:
-		}
-		log.Trace(fmt.Sprintf("Checking node: %s", id))
-		//if there are more than one chunk, test only succeeds if all expected chunks are found
-		allSuccess := true
 
+		// File retrieval check is repeated until all uploaded files are retrieved from all nodes
+		// or until the timeout is reached.
+		allSuccess := false
+		for !allSuccess {
+			for _, id := range nodeIDs {
+				//for each expected chunk, check if it is in the local store
+				localChunks := conf.idToChunksMap[id]
+				localSuccess := true
+				for _, ch := range localChunks {
+					//get the real chunk by the index in the index array
+					chunk := conf.hashes[ch]
+					log.Trace(fmt.Sprintf("node has chunk: %s:", chunk))
+					//check if the expected chunk is indeed in the localstore
+					var err error
 					//check on the node's FileStore (netstore)
-		fileStore := registries[id].fileStore
+					item, ok := sim.NodeItem(id, bucketKeyFileStore)
+					if !ok {
+						return fmt.Errorf("No registry")
+					}
+					fileStore := item.(*storage.FileStore)
 					//check all chunks
 					for i, hash := range conf.hashes {
 						reader, _ := fileStore.Retrieve(context.TODO(), hash)
 						//check that we can read the file size and that it corresponds to the generated file size
-			if s, err := reader.Size(context.TODO(), nil); err != nil || s != int64(len(randomFiles[i])) {
+						if s, err := reader.Size(ctx, nil); err != nil || s != int64(len(randomFiles[i])) {
 							allSuccess = false
 							log.Warn("Retrieve error", "err", err, "hash", hash, "nodeId", id)
 						} else {
 							log.Debug(fmt.Sprintf("File with root hash %x successfully retrieved", hash))
 						}
 					}
-
+					if err != nil {
-		return allSuccess, nil
+						log.Warn(fmt.Sprintf("Chunk %s NOT found for id %s", chunk, id))
-	}
+						localSuccess = false
-
+					} else {
-	//for each tick, run the checks on all nodes
+						log.Debug(fmt.Sprintf("Chunk %s IS FOUND for id %s", chunk, id))
-	timingTicker := time.NewTicker(5 * time.Second)
-	defer timingTicker.Stop()
-	go func() {
-		//for live upload, we should wait for uploads to have finished
-		//before starting to trigger the checks, due to file size
-		if live {
-			<-uploadFinished
-		}
-		for range timingTicker.C {
-			for i := 0; i < len(ids); i++ {
-				log.Trace(fmt.Sprintf("triggering step %d, id %s", i, ids[i]))
-				trigger <- ids[i]
 					}
 				}
-	}()
+				allSuccess = localSuccess
-
+			}
-	log.Info("Starting simulation run...")
+		}
-
+		if !allSuccess {
-	timeout := MaxTimeout * time.Second
+			return fmt.Errorf("Not all chunks succeeded!")
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+		}
-	defer cancel()
+		return nil
-
-	//run the simulation
-	result := simulations.NewSimulation(net).Run(ctx, &simulations.Step{
-		Action:  action,
-		Trigger: trigger,
-		Expect: &simulations.Expectation{
-			Nodes: ids,
-			Check: check,
-		},
 	})
 
 	if result.Error != nil {
@@ -466,14 +249,6 @@ func runFileRetrievalTest(nodeCount int) error {
 /*
 The test generates the given number of chunks.
 
-The upload is done by dependency to the global
-`live` and `history` variables;
-
-If `live` is set, first stream subscriptions are established, then
-upload to a random node.
-
-If `history` is enabled, first upload then build up subscriptions.
-
 The test loads a snapshot file to construct the swarm network,
 assuming that the snapshot file identifies a healthy
 kademlia network. Nevertheless a health check runs in the
@@ -482,259 +257,129 @@ simulation's `action` function.
 The snapshot should have 'streamer' in its service list.
 */
 func runRetrievalTest(chunkCount int, nodeCount int) error {
-	//for every run (live, history), int the variables
+	sim := simulation.New(map[string]simulation.ServiceFunc{
-	initRetrievalTest()
+		"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
-	//the ids of the snapshot nodes, initiate only now as we need nodeCount
+
-	ids = make([]discover.NodeID, nodeCount)
+			id := ctx.Config.ID
-	//channel to check for disconnection errors
+			addr := network.NewAddrFromNodeID(id)
-	disconnectC := make(chan error)
+			store, datadir, err := createTestLocalStorageForID(id, addr)
-	//channel to close disconnection watcher routine
+			if err != nil {
-	quitC := make(chan struct{})
+				return nil, nil, err
-	//the test conf (using same as in `snapshot_sync_test`
+			}
-	conf = &synctestConfig{}
+			bucket.Store(bucketKeyStore, store)
+			cleanup = func() {
+				os.RemoveAll(datadir)
+				store.Close()
+			}
+			localStore := store.(*storage.LocalStore)
+			db := storage.NewDBAPI(localStore)
+			kad := network.NewKademlia(addr.Over(), network.NewKadParams())
+			delivery := NewDelivery(kad, db)
+
+			r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
+				DoSync:          true,
+				SyncUpdateDelay: 0,
+			})
+
+			fileStore := storage.NewFileStore(storage.NewNetStore(localStore, nil), storage.NewFileStoreParams())
+			bucketKeyFileStore = simulation.BucketKey("filestore")
+			bucket.Store(bucketKeyFileStore, fileStore)
+
+			return r, cleanup, nil
+
+		},
+	})
+	defer sim.Close()
+
+	conf := &synctestConfig{}
+	//map of discover ID to indexes of chunks expected at that ID
+	conf.idToChunksMap = make(map[discover.NodeID][]int)
 	//map of overlay address to discover ID
-	conf.addrToIdMap = make(map[string]discover.NodeID)
+	conf.addrToIDMap = make(map[string]discover.NodeID)
 	//array where the generated chunk hashes will be stored
 	conf.hashes = make([]storage.Address, 0)
-	//load nodes from the snapshot file
+
-	net, err := initNetWithSnapshot(nodeCount)
+	err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
 	if err != nil {
 		return err
 	}
-	var rpcSubscriptionsWg sync.WaitGroup
+
-	//do cleanup after test is terminated
+	ctx := context.Background()
-	defer func() {
+	result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
-		//shutdown the snapshot network
+		nodeIDs := sim.UpNodeIDs()
-		net.Shutdown()
+		for _, n := range nodeIDs {
-		//after the test, clean up local stores initialized with createLocalStoreForId
+			//get the kademlia overlay address from this ID
-		localStoreCleanup()
+			a := network.ToOverlayAddr(n.Bytes())
-		//finally clear all data directories
-		datadirsCleanup()
-	}()
-	//get the nodes of the network
-	nodes := net.GetNodes()
-	//select one index at random...
-	idx := rand.Intn(len(nodes))
-	//...and get the the node at that index
-	//this is the node selected for upload
-	uploadNode := nodes[idx]
-	//iterate over all nodes...
-	for c := 0; c < len(nodes); c++ {
-		//create an array of discovery nodeIDS
-		ids[c] = nodes[c].ID()
-		a := network.ToOverlayAddr(ids[c].Bytes())
 			//append it to the array of all overlay addresses
 			conf.addrs = append(conf.addrs, a)
-		conf.addrToIdMap[string(a)] = ids[c]
+			//the proximity calculation is on overlay addr,
+			//the p2p/simulations check func triggers on discover.NodeID,
+			//so we need to know which overlay addr maps to which nodeID
+			conf.addrToIDMap[string(a)] = n
 		}
 
-	//needed for healthy call
+		//an array for the random files
-	ppmap = network.NewPeerPotMap(testMinProxBinSize, conf.addrs)
+		var randomFiles []string
-
+		//this is the node selected for upload
-	trigger := make(chan discover.NodeID)
+		node := sim.RandomUpNode()
-	//simulation action
+		item, ok := sim.NodeItem(node.ID, bucketKeyStore)
-	action := func(ctx context.Context) error {
+		if !ok {
-		//first run the health check on all nodes,
+			return fmt.Errorf("No localstore")
-		//wait until nodes are all healthy
-		ticker := time.NewTicker(200 * time.Millisecond)
-		defer ticker.Stop()
-		for range ticker.C {
-			healthy := true
-			for _, id := range ids {
-				r := registries[id]
-				//PeerPot for this node
-				addr := common.Bytes2Hex(network.ToOverlayAddr(id.Bytes()))
-				pp := ppmap[addr]
-				//call Healthy RPC
-				h := r.delivery.overlay.Healthy(pp)
-				//print info
-				log.Debug(r.delivery.overlay.String())
-				log.Debug(fmt.Sprintf("IS HEALTHY: %t", h.GotNN && h.KnowNN && h.Full))
-				if !h.GotNN || !h.Full {
-					healthy = false
-					break
 		}
-			}
+		lstore := item.(*storage.LocalStore)
-			if healthy {
+		conf.hashes, err = uploadFileToSingleNodeStore(node.ID, chunkCount, lstore)
-				break
-			}
-		}
-
-		if history {
-			log.Info("Uploading for history")
-			//If testing only history, we upload the chunk(s) first
-			conf.hashes, err = uploadFileToSingleNodeStore(uploadNode.ID(), chunkCount)
 		if err != nil {
 			return err
 		}
-		}
+		if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
-
-		//variables needed to wait for all subscriptions established before uploading
-		errc := make(chan error)
-
-		//now setup and start event watching in order to know when we can upload
-		ctx, watchCancel := context.WithTimeout(context.Background(), MaxTimeout*time.Second)
-		defer watchCancel()
-
-		log.Info("Setting up stream subscription")
-		//We need two iterations, one to subscribe to the subscription events
-		//(so we know when setup phase is finished), and one to
-		//actually run the stream subscriptions. We can't do it in the same iteration,
-		//because while the first nodes in the loop are setting up subscriptions,
-		//the latter ones have not subscribed to listen to peer events yet,
-		//and then we miss events.
-
-		//first iteration: setup disconnection watcher and subscribe to peer events
-		for j, id := range ids {
-			log.Trace(fmt.Sprintf("Subscribe to subscription events: %d", j))
-			client, err := net.GetNode(id).Client()
-			if err != nil {
 			return err
 		}
 
-			//check for `SubscribeMsg` events to know when setup phase is complete
+		// File retrieval check is repeated until all uploaded files are retrieved from all nodes
-			wsDoneC := watchSubscriptionEvents(ctx, id, client, errc, quitC)
+		// or until the timeout is reached.
-			// doneC is nil, the error happened which is sent to errc channel, already
+		allSuccess := false
-			if wsDoneC == nil {
+		for !allSuccess {
-				continue
+			for _, id := range nodeIDs {
-			}
+				//for each expected chunk, check if it is in the local store
-			rpcSubscriptionsWg.Add(1)
+				localChunks := conf.idToChunksMap[id]
-			go func() {
+				localSuccess := true
-				<-wsDoneC
+				for _, ch := range localChunks {
-				rpcSubscriptionsWg.Done()
+					//get the real chunk by the index in the index array
-			}()
+					chunk := conf.hashes[ch]
-
+					log.Trace(fmt.Sprintf("node has chunk: %s:", chunk))
-			//watch for peers disconnecting
+					//check if the expected chunk is indeed in the localstore
-			wdDoneC, err := streamTesting.WatchDisconnections(id, client, disconnectC, quitC)
+					var err error
-			if err != nil {
-				return err
-			}
-			rpcSubscriptionsWg.Add(1)
-			go func() {
-				<-wdDoneC
-				rpcSubscriptionsWg.Done()
-			}()
-		}
-
-		//second iteration: start syncing and setup stream subscriptions
-		for j, id := range ids {
-			log.Trace(fmt.Sprintf("Start syncing and stream subscriptions: %d", j))
-			client, err := net.GetNode(id).Client()
-			if err != nil {
-				return err
-			}
-			//start syncing!
-			var cnt int
-			err = client.CallContext(ctx, &cnt, "stream_startSyncing")
-			if err != nil {
-				return err
-			}
-			//increment the number of subscriptions we need to wait for
-			//by the count returned from startSyncing (SYNC subscriptions)
-			subscriptionCount += cnt
-			//now also add the number of RETRIEVAL_REQUEST subscriptions
-			for snid := range registries[id].peers {
-				subscriptionCount++
-				err = client.CallContext(ctx, nil, "stream_subscribeStream", snid, NewStream(swarmChunkServerStreamName, "", false), nil, Top)
-				if err != nil {
-					return err
-				}
-			}
-		}
-
-		//now wait until the number of expected subscriptions has been finished
-		//`watchSubscriptionEvents` will write with a `nil` value to errc
-		//every time a `SubscriptionMsg` has been received
-		for err := range errc {
-			if err != nil {
-				return err
-			}
-			//`nil` received, decrement count
-			subscriptionCount--
-			//all subscriptions received
-			if subscriptionCount == 0 {
-				break
-			}
-		}
-
-		log.Info("Stream subscriptions successfully requested, action terminated")
-
-		if live {
-			//now upload the chunks to the selected random single node
-			chnks, err := uploadFileToSingleNodeStore(uploadNode.ID(), chunkCount)
-			if err != nil {
-				return err
-			}
-			conf.hashes = append(conf.hashes, chnks...)
-		}
-
-		return nil
-	}
-
-	chunkSize := storage.DefaultChunkSize
-
-	//check defines what will be checked during the test
-	check := func(ctx context.Context, id discover.NodeID) (bool, error) {
-
-		//don't check the uploader node
-		if id == uploadNode.ID() {
-			return true, nil
-		}
-
-		select {
-		case <-ctx.Done():
-			return false, ctx.Err()
-		case e := <-disconnectC:
-			log.Error(e.Error())
-			return false, fmt.Errorf("Disconnect event detected, network unhealthy")
-		default:
-		}
-		log.Trace(fmt.Sprintf("Checking node: %s", id))
-		//if there are more than one chunk, test only succeeds if all expected chunks are found
-		allSuccess := true
-
 					//check on the node's FileStore (netstore)
-		fileStore := registries[id].fileStore
+					item, ok := sim.NodeItem(id, bucketKeyFileStore)
+					if !ok {
+						return fmt.Errorf("No registry")
+					}
+					fileStore := item.(*storage.FileStore)
 					//check all chunks
-		for _, chnk := range conf.hashes {
+					for i, hash := range conf.hashes {
-			reader, _ := fileStore.Retrieve(context.TODO(), chnk)
+						reader, _ := fileStore.Retrieve(context.TODO(), hash)
-			//assuming that reading the Size of the chunk is enough to know we found it
+						//check that we can read the file size and that it corresponds to the generated file size
-			if s, err := reader.Size(context.TODO(), nil); err != nil || s != chunkSize {
+						if s, err := reader.Size(ctx, nil); err != nil || s != int64(len(randomFiles[i])) {
 							allSuccess = false
-				log.Warn("Retrieve error", "err", err, "chunk", chnk, "nodeId", id)
+							log.Warn("Retrieve error", "err", err, "hash", hash, "nodeId", id)
 						} else {
-				log.Debug(fmt.Sprintf("Chunk %x found", chnk))
+							log.Debug(fmt.Sprintf("File with root hash %x successfully retrieved", hash))
 						}
 					}
-		return allSuccess, nil
+					if err != nil {
-	}
+						log.Warn(fmt.Sprintf("Chunk %s NOT found for id %s", chunk, id))
-
+						localSuccess = false
-	//for each tick, run the checks on all nodes
+					} else {
-	timingTicker := time.NewTicker(5 * time.Second)
+						log.Debug(fmt.Sprintf("Chunk %s IS FOUND for id %s", chunk, id))
-	defer timingTicker.Stop()
-	go func() {
-		for range timingTicker.C {
-			for i := 0; i < len(ids); i++ {
-				log.Trace(fmt.Sprintf("triggering step %d, id %s", i, ids[i]))
-				trigger <- ids[i]
 					}
 				}
-	}()
+				allSuccess = localSuccess
-
+			}
-	log.Info("Starting simulation run...")
+		}
-
+		if !allSuccess {
-	timeout := MaxTimeout * time.Second
+			return fmt.Errorf("Not all chunks succeeded!")
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+		}
-	defer cancel()
+		return nil
-
-	//run the simulation
-	result := simulations.NewSimulation(net).Run(ctx, &simulations.Step{
-		Action:  action,
-		Trigger: trigger,
-		Expect: &simulations.Expectation{
-			Nodes: ids,
-			Check: check,
-		},
 	})
 
 	if result.Error != nil {
@@ -743,53 +388,3 @@ func runRetrievalTest(chunkCount int, nodeCount int) error {
 
 	return nil
 }
-
-//upload generated files to nodes
-//every node gets one file uploaded
-func uploadFilesToNodes(nodes []*simulations.Node) ([]storage.Address, []string, error) {
-	nodeCnt := len(nodes)
-	log.Debug(fmt.Sprintf("Uploading %d files to nodes", nodeCnt))
-	//array holding generated files
-	rfiles := make([]string, nodeCnt)
-	//array holding the root hashes of the files
-	rootAddrs := make([]storage.Address, nodeCnt)
-
-	var err error
-	//for every node, generate a file and upload
-	for i, n := range nodes {
-		id := n.ID()
-		fileStore := registries[id].fileStore
-		//generate a file
-		rfiles[i], err = generateRandomFile()
-		if err != nil {
-			return nil, nil, err
-		}
-		//store it (upload it) on the FileStore
-		ctx := context.TODO()
-		rk, wait, err := fileStore.Store(ctx, strings.NewReader(rfiles[i]), int64(len(rfiles[i])), false)
-		log.Debug("Uploaded random string file to node")
-		if err != nil {
-			return nil, nil, err
-		}
-		err = wait(ctx)
-		if err != nil {
-			return nil, nil, err
-		}
-		rootAddrs[i] = rk
-	}
-	return rootAddrs, rfiles, nil
-}
-
-//generate a random file (string)
-func generateRandomFile() (string, error) {
-	//generate a random file size between minFileSize and maxFileSize
-	fileSize := rand.Intn(maxFileSize-minFileSize) + minFileSize
-	log.Debug(fmt.Sprintf("Generated file with filesize %d kB", fileSize))
-	b := make([]byte, fileSize*1024)
-	_, err := crand.Read(b)
-	if err != nil {
-		log.Error("Error generating random file.", "err", err)
-		return "", err
-	}
-	return string(b), nil
-}

swarm/network/stream/snapshot_sync_test.go

@@ -18,12 +18,8 @@ package stream
 import (
 	"context"
 	crand "crypto/rand"
-	"encoding/json"
-	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
-	"math/rand"
 	"os"
 	"sync"
 	"testing"
@@ -31,82 +27,27 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/node"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/p2p/discover"
-	"github.com/ethereum/go-ethereum/p2p/simulations"
 	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
-	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/ethereum/go-ethereum/swarm/network"
-	streamTesting "github.com/ethereum/go-ethereum/swarm/network/stream/testing"
+	"github.com/ethereum/go-ethereum/swarm/network/simulation"
 	"github.com/ethereum/go-ethereum/swarm/pot"
+	"github.com/ethereum/go-ethereum/swarm/state"
 	"github.com/ethereum/go-ethereum/swarm/storage"
+	mockdb "github.com/ethereum/go-ethereum/swarm/storage/mock/db"
 )
 
 const testMinProxBinSize = 2
 const MaxTimeout = 600
 
-var (
-	pof = pot.DefaultPof(256)
-
-	conf     *synctestConfig
-	ids      []discover.NodeID
-	datadirs map[discover.NodeID]string
-	ppmap    map[string]*network.PeerPot
-
-	live    bool
-	history bool
-
-	longrunning = flag.Bool("longrunning", false, "do run long-running tests")
-)
-
 type synctestConfig struct {
 	addrs            [][]byte
 	hashes           []storage.Address
 	idToChunksMap    map[discover.NodeID][]int
 	chunksToNodesMap map[string][]int
-	addrToIdMap      map[string]discover.NodeID
+	addrToIDMap      map[string]discover.NodeID
-}
-
-func init() {
-	rand.Seed(time.Now().Unix())
-}
-
-//common_test needs to initialize the test in a init() func
-//in order for adapters to register the NewStreamerService;
-//this service is dependent on some global variables
-//we thus need to initialize first as init() as well.
-func initSyncTest() {
-	//assign the toAddr func so NewStreamerService can build the addr
-	toAddr = func(id discover.NodeID) *network.BzzAddr {
-		addr := network.NewAddrFromNodeID(id)
-		return addr
-	}
-	//global func to create local store
-	if *useMockStore {
-		createStoreFunc = createMockStore
-	} else {
-		createStoreFunc = createTestLocalStorageForId
-	}
-	//local stores
-	stores = make(map[discover.NodeID]storage.ChunkStore)
-	//data directories for each node and store
-	datadirs = make(map[discover.NodeID]string)
-	//deliveries for each node
-	deliveries = make(map[discover.NodeID]*Delivery)
-	//registries, map of discover.NodeID to its streamer
-	registries = make(map[discover.NodeID]*TestRegistry)
-	//not needed for this test but required from common_test for NewStreamService
-	waitPeerErrC = make(chan error)
-	//also not needed for this test but required for NewStreamService
-	peerCount = func(id discover.NodeID) int {
-		if ids[0] == id || ids[len(ids)-1] == id {
-			return 1
-		}
-		return 2
-	}
-	if *useMockStore {
-		createGlobalStore()
-	}
 }
 
 //This test is a syncing test for nodes.
@@ -116,12 +57,12 @@ func initSyncTest() {
 //to the pivot node, and we check that nodes get the chunks
 //they are expected to store based on the syncing protocol.
 //Number of chunks and nodes can be provided via commandline too.
-func TestSyncing(t *testing.T) {
+func TestSyncingViaGlobalSync(t *testing.T) {
 	//if nodes/chunks have been provided via commandline,
 	//run the tests with these values
 	if *nodes != 0 && *chunks != 0 {
 		log.Info(fmt.Sprintf("Running test with %d chunks and %d nodes...", *chunks, *nodes))
-		testSyncing(t, *chunks, *nodes)
+		testSyncingViaGlobalSync(t, *chunks, *nodes)
 	} else {
 		var nodeCnt []int
 		var chnkCnt []int
@@ -138,51 +79,194 @@ func TestSyncing(t *testing.T) {
 		for _, chnk := range chnkCnt {
 			for _, n := range nodeCnt {
 				log.Info(fmt.Sprintf("Long running test with %d chunks and %d nodes...", chnk, n))
-				testSyncing(t, chnk, n)
+				testSyncingViaGlobalSync(t, chnk, n)
 			}
 		}
 	}
 }
 
-//Do run the tests
+func TestSyncingViaDirectSubscribe(t *testing.T) {
-//Every test runs 3 times, a live, a history, and a live AND history
+	//if nodes/chunks have been provided via commandline,
-func testSyncing(t *testing.T, chunkCount int, nodeCount int) {
+	//run the tests with these values
-	//test live and NO history
+	if *nodes != 0 && *chunks != 0 {
-	log.Info("Testing live and no history")
+		log.Info(fmt.Sprintf("Running test with %d chunks and %d nodes...", *chunks, *nodes))
-	live = true
+		err := testSyncingViaDirectSubscribe(*chunks, *nodes)
-	history = false
-	err := runSyncTest(chunkCount, nodeCount, live, history)
 		if err != nil {
 			t.Fatal(err)
 		}
-	//test history only
+	} else {
-	log.Info("Testing history only")
+		var nodeCnt []int
-	live = false
+		var chnkCnt []int
-	history = true
+		//if the `longrunning` flag has been provided
-	err = runSyncTest(chunkCount, nodeCount, live, history)
+		//run more test combinations
+		if *longrunning {
+			chnkCnt = []int{1, 8, 32, 256, 1024}
+			nodeCnt = []int{32, 16}
+		} else {
+			//default test
+			chnkCnt = []int{4, 32}
+			nodeCnt = []int{32, 16}
+		}
+		for _, chnk := range chnkCnt {
+			for _, n := range nodeCnt {
+				log.Info(fmt.Sprintf("Long running test with %d chunks and %d nodes...", chnk, n))
+				err := testSyncingViaDirectSubscribe(chnk, n)
 				if err != nil {
 					t.Fatal(err)
 				}
-	//finally test live and history
+			}
-	log.Info("Testing live and history")
+		}
-	live = true
+	}
-	err = runSyncTest(chunkCount, nodeCount, live, history)
+}
+
+func testSyncingViaGlobalSync(t *testing.T, chunkCount int, nodeCount int) {
+	sim := simulation.New(map[string]simulation.ServiceFunc{
+		"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
+
+			id := ctx.Config.ID
+			addr := network.NewAddrFromNodeID(id)
+			store, datadir, err := createTestLocalStorageForID(id, addr)
+			if err != nil {
+				return nil, nil, err
+			}
+			bucket.Store(bucketKeyStore, store)
+			cleanup = func() {
+				os.RemoveAll(datadir)
+				store.Close()
+			}
+			localStore := store.(*storage.LocalStore)
+			db := storage.NewDBAPI(localStore)
+			kad := network.NewKademlia(addr.Over(), network.NewKadParams())
+			delivery := NewDelivery(kad, db)
+
+			r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
+				DoSync:          true,
+				SyncUpdateDelay: 3 * time.Second,
+			})
+			bucket.Store(bucketKeyRegistry, r)
+
+			return r, cleanup, nil
+
+		},
+	})
+	defer sim.Close()
+
+	log.Info("Initializing test config")
+
+	conf := &synctestConfig{}
+	//map of discover ID to indexes of chunks expected at that ID
+	conf.idToChunksMap = make(map[discover.NodeID][]int)
+	//map of overlay address to discover ID
+	conf.addrToIDMap = make(map[string]discover.NodeID)
+	//array where the generated chunk hashes will be stored
+	conf.hashes = make([]storage.Address, 0)
+
+	err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
 	if err != nil {
 		t.Fatal(err)
 	}
+
+	ctx, cancelSimRun := context.WithTimeout(context.Background(), 1*time.Minute)
+	defer cancelSimRun()
+
+	result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
+		nodeIDs := sim.UpNodeIDs()
+		for _, n := range nodeIDs {
+			//get the kademlia overlay address from this ID
+			a := network.ToOverlayAddr(n.Bytes())
+			//append it to the array of all overlay addresses
+			conf.addrs = append(conf.addrs, a)
+			//the proximity calculation is on overlay addr,
+			//the p2p/simulations check func triggers on discover.NodeID,
+			//so we need to know which overlay addr maps to which nodeID
+			conf.addrToIDMap[string(a)] = n
+		}
+
+		//get the the node at that index
+		//this is the node selected for upload
+		node := sim.RandomUpNode()
+		item, ok := sim.NodeItem(node.ID, bucketKeyStore)
+		if !ok {
+			return fmt.Errorf("No localstore")
+		}
+		lstore := item.(*storage.LocalStore)
+		hashes, err := uploadFileToSingleNodeStore(node.ID, chunkCount, lstore)
+		if err != nil {
+			return err
+		}
+		conf.hashes = append(conf.hashes, hashes...)
+		mapKeysToNodes(conf)
+
+		if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
+			return err
+		}
+
+		// File retrieval check is repeated until all uploaded files are retrieved from all nodes
+		// or until the timeout is reached.
+		allSuccess := false
+		var gDir string
+		var globalStore *mockdb.GlobalStore
+		if *useMockStore {
+			gDir, globalStore, err = createGlobalStore()
+			if err != nil {
+				return fmt.Errorf("Something went wrong; using mockStore enabled but globalStore is nil")
+			}
+			defer func() {
+				os.RemoveAll(gDir)
+				err := globalStore.Close()
+				if err != nil {
+					log.Error("Error closing global store! %v", "err", err)
+				}
+			}()
+		}
+		for !allSuccess {
+			for _, id := range nodeIDs {
+				//for each expected chunk, check if it is in the local store
+				localChunks := conf.idToChunksMap[id]
+				localSuccess := true
+				for _, ch := range localChunks {
+					//get the real chunk by the index in the index array
+					chunk := conf.hashes[ch]
+					log.Trace(fmt.Sprintf("node has chunk: %s:", chunk))
+					//check if the expected chunk is indeed in the localstore
+					var err error
+					if *useMockStore {
+						//use the globalStore if the mockStore should be used; in that case,
+						//the complete localStore stack is bypassed for getting the chunk
+						_, err = globalStore.Get(common.BytesToAddress(id.Bytes()), chunk)
+					} else {
+						//use the actual localstore
+						item, ok := sim.NodeItem(id, bucketKeyStore)
+						if !ok {
+							return fmt.Errorf("Error accessing localstore")
+						}
+						lstore := item.(*storage.LocalStore)
+						_, err = lstore.Get(ctx, chunk)
+					}
+					if err != nil {
+						log.Warn(fmt.Sprintf("Chunk %s NOT found for id %s", chunk, id))
+						localSuccess = false
+					} else {
+						log.Debug(fmt.Sprintf("Chunk %s IS FOUND for id %s", chunk, id))
+					}
+				}
+				allSuccess = localSuccess
+			}
+		}
+		if !allSuccess {
+			return fmt.Errorf("Not all chunks succeeded!")
+		}
+		return nil
+	})
+
+	if result.Error != nil {
+		t.Fatal(result.Error)
+	}
 }
 
 /*
 The test generates the given number of chunks
 
-The upload is done by dependency to the global
-`live` and `history` variables;
-
-If `live` is set, first stream subscriptions are established, then
-upload to a random node.
-
-If `history` is enabled, first upload then build up subscriptions.
-
 For every chunk generated, the nearest node addresses
 are identified, we verify that the nodes closer to the
 chunk addresses actually do have the chunks in their local stores.
@@ -190,178 +274,84 @@ chunk addresses actually do have the chunks in their local stores.
 The test loads a snapshot file to construct the swarm network,
 assuming that the snapshot file identifies a healthy
 kademlia network. The snapshot should have 'streamer' in its service list.
-
-For every test run, a series of three tests will be executed:
-- a LIVE test first, where first subscriptions are established,
-  then a file (random chunks) is uploaded
-- a HISTORY test, where the file is uploaded first, and then
-  the subscriptions are established
-- a crude LIVE AND HISTORY test last, where (different) chunks
-  are uploaded twice, once before and once after subscriptions
 */
-func runSyncTest(chunkCount int, nodeCount int, live bool, history bool) error {
+func testSyncingViaDirectSubscribe(chunkCount int, nodeCount int) error {
-	initSyncTest()
+	sim := simulation.New(map[string]simulation.ServiceFunc{
-	//the ids of the snapshot nodes, initiate only now as we need nodeCount
+		"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
-	ids = make([]discover.NodeID, nodeCount)
+
-	//initialize the test struct
+			id := ctx.Config.ID
-	conf = &synctestConfig{}
+			addr := network.NewAddrFromNodeID(id)
+			store, datadir, err := createTestLocalStorageForID(id, addr)
+			if err != nil {
+				return nil, nil, err
+			}
+			bucket.Store(bucketKeyStore, store)
+			cleanup = func() {
+				os.RemoveAll(datadir)
+				store.Close()
+			}
+			localStore := store.(*storage.LocalStore)
+			db := storage.NewDBAPI(localStore)
+			kad := network.NewKademlia(addr.Over(), network.NewKadParams())
+			delivery := NewDelivery(kad, db)
+
+			r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), nil)
+			bucket.Store(bucketKeyRegistry, r)
+
+			fileStore := storage.NewFileStore(storage.NewNetStore(localStore, nil), storage.NewFileStoreParams())
+			bucket.Store(bucketKeyFileStore, fileStore)
+
+			return r, cleanup, nil
+
+		},
+	})
+	defer sim.Close()
+
+	ctx, cancelSimRun := context.WithTimeout(context.Background(), 1*time.Minute)
+	defer cancelSimRun()
+
+	conf := &synctestConfig{}
 	//map of discover ID to indexes of chunks expected at that ID
 	conf.idToChunksMap = make(map[discover.NodeID][]int)
 	//map of overlay address to discover ID
-	conf.addrToIdMap = make(map[string]discover.NodeID)
+	conf.addrToIDMap = make(map[string]discover.NodeID)
 	//array where the generated chunk hashes will be stored
 	conf.hashes = make([]storage.Address, 0)
-	//channel to trigger node checks in the simulation
-	trigger := make(chan discover.NodeID)
-	//channel to check for disconnection errors
-	disconnectC := make(chan error)
-	//channel to close disconnection watcher routine
-	quitC := make(chan struct{})
 
-	//load nodes from the snapshot file
+	err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
-	net, err := initNetWithSnapshot(nodeCount)
 	if err != nil {
 		return err
 	}
-	var rpcSubscriptionsWg sync.WaitGroup
-	//do cleanup after test is terminated
-	defer func() {
-		// close quitC channel to signall all goroutines to clanup
-		// before calling simulation network shutdown.
-		close(quitC)
-		//wait for all rpc subscriptions to unsubscribe
-		rpcSubscriptionsWg.Wait()
-		//shutdown the snapshot network
-		net.Shutdown()
-		//after the test, clean up local stores initialized with createLocalStoreForId
-		localStoreCleanup()
-		//finally clear all data directories
-		datadirsCleanup()
-	}()
-	//get the nodes of the network
-	nodes := net.GetNodes()
-	//select one index at random...
-	idx := rand.Intn(len(nodes))
-	//...and get the the node at that index
-	//this is the node selected for upload
-	node := nodes[idx]
 
-	log.Info("Initializing test config")
+	result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
-	//iterate over all nodes...
+		nodeIDs := sim.UpNodeIDs()
-	for c := 0; c < len(nodes); c++ {
+		for _, n := range nodeIDs {
-		//create an array of discovery node IDs
-		ids[c] = nodes[c].ID()
 			//get the kademlia overlay address from this ID
-		a := network.ToOverlayAddr(ids[c].Bytes())
+			a := network.ToOverlayAddr(n.Bytes())
 			//append it to the array of all overlay addresses
 			conf.addrs = append(conf.addrs, a)
 			//the proximity calculation is on overlay addr,
 			//the p2p/simulations check func triggers on discover.NodeID,
 			//so we need to know which overlay addr maps to which nodeID
-		conf.addrToIdMap[string(a)] = ids[c]
+			conf.addrToIDMap[string(a)] = n
-	}
-	log.Info("Test config successfully initialized")
-
-	//only needed for healthy call when debugging
-	ppmap = network.NewPeerPotMap(testMinProxBinSize, conf.addrs)
-
-	//define the action to be performed before the test checks: start syncing
-	action := func(ctx context.Context) error {
-		//first run the health check on all nodes,
-		//wait until nodes are all healthy
-		ticker := time.NewTicker(200 * time.Millisecond)
-		defer ticker.Stop()
-		for range ticker.C {
-			healthy := true
-			for _, id := range ids {
-				r := registries[id]
-				//PeerPot for this node
-				addr := common.Bytes2Hex(network.ToOverlayAddr(id.Bytes()))
-				pp := ppmap[addr]
-				//call Healthy RPC
-				h := r.delivery.overlay.Healthy(pp)
-				//print info
-				log.Debug(r.delivery.overlay.String())
-				log.Debug(fmt.Sprintf("IS HEALTHY: %t", h.GotNN && h.KnowNN && h.Full))
-				if !h.GotNN || !h.Full {
-					healthy = false
-					break
-				}
-			}
-			if healthy {
-				break
-			}
 		}
 
-		if history {
+		var subscriptionCount int
-			log.Info("Uploading for history")
-			//If testing only history, we upload the chunk(s) first
-			chunks, err := uploadFileToSingleNodeStore(node.ID(), chunkCount)
-			if err != nil {
-				return err
-			}
-			conf.hashes = append(conf.hashes, chunks...)
-			//finally map chunks to the closest addresses
-			mapKeysToNodes(conf)
-		}
 
-		//variables needed to wait for all subscriptions established before uploading
+		filter := simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeMsgRecv).Protocol("stream").MsgCode(4)
-		errc := make(chan error)
+		eventC := sim.PeerEvents(ctx, nodeIDs, filter)
 
-		//now setup and start event watching in order to know when we can upload
+		for j, node := range nodeIDs {
-		ctx, watchCancel := context.WithTimeout(context.Background(), MaxTimeout*time.Second)
-		defer watchCancel()
-
-		log.Info("Setting up stream subscription")
-
-		//We need two iterations, one to subscribe to the subscription events
-		//(so we know when setup phase is finished), and one to
-		//actually run the stream subscriptions. We can't do it in the same iteration,
-		//because while the first nodes in the loop are setting up subscriptions,
-		//the latter ones have not subscribed to listen to peer events yet,
-		//and then we miss events.
-
-		//first iteration: setup disconnection watcher and subscribe to peer events
-		for j, id := range ids {
-			log.Trace(fmt.Sprintf("Subscribe to subscription events: %d", j))
-			client, err := net.GetNode(id).Client()
-			if err != nil {
-				return err
-			}
-
-			wsDoneC := watchSubscriptionEvents(ctx, id, client, errc, quitC)
-			// doneC is nil, the error happened which is sent to errc channel, already
-			if wsDoneC == nil {
-				continue
-			}
-			rpcSubscriptionsWg.Add(1)
-			go func() {
-				<-wsDoneC
-				rpcSubscriptionsWg.Done()
-			}()
-
-			//watch for peers disconnecting
-			wdDoneC, err := streamTesting.WatchDisconnections(id, client, disconnectC, quitC)
-			if err != nil {
-				return err
-			}
-			rpcSubscriptionsWg.Add(1)
-			go func() {
-				<-wdDoneC
-				rpcSubscriptionsWg.Done()
-			}()
-		}
-
-		//second iteration: start syncing
-		for j, id := range ids {
 			log.Trace(fmt.Sprintf("Start syncing subscriptions: %d", j))
-			client, err := net.GetNode(id).Client()
-			if err != nil {
-				return err
-			}
 			//start syncing!
+			item, ok := sim.NodeItem(node, bucketKeyRegistry)
+			if !ok {
+				return fmt.Errorf("No registry")
+			}
+			registry := item.(*Registry)
+
 			var cnt int
-			err = client.CallContext(ctx, &cnt, "stream_startSyncing")
+			cnt, err = startSyncing(registry, conf)
 			if err != nil {
 				return err
 			}
@@ -370,57 +360,50 @@ func runSyncTest(chunkCount int, nodeCount int, live bool, history bool) error {
 			subscriptionCount += cnt
 		}
 
-		//now wait until the number of expected subscriptions has been finished
+		for e := range eventC {
-		//`watchSubscriptionEvents` will write with a `nil` value to errc
+			if e.Error != nil {
-		for err := range errc {
+				return e.Error
-			if err != nil {
-				return err
 			}
-			//`nil` received, decrement count
 			subscriptionCount--
-			//all subscriptions received
 			if subscriptionCount == 0 {
 				break
 			}
 		}
-
+		//select a random node for upload
-		log.Info("Stream subscriptions successfully requested")
+		node := sim.RandomUpNode()
-		if live {
+		item, ok := sim.NodeItem(node.ID, bucketKeyStore)
-			//now upload the chunks to the selected random single node
+		if !ok {
-			hashes, err := uploadFileToSingleNodeStore(node.ID(), chunkCount)
+			return fmt.Errorf("No localstore")
+		}
+		lstore := item.(*storage.LocalStore)
+		hashes, err := uploadFileToSingleNodeStore(node.ID, chunkCount, lstore)
 		if err != nil {
 			return err
 		}
 		conf.hashes = append(conf.hashes, hashes...)
-			//finally map chunks to the closest addresses
-			log.Debug(fmt.Sprintf("Uploaded chunks for live syncing: %v", conf.hashes))
 		mapKeysToNodes(conf)
-			log.Info(fmt.Sprintf("Uploaded %d chunks to random single node", chunkCount))
+
+		if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
+			return err
 		}
 
-		log.Info("Action terminated")
+		var gDir string
-
+		var globalStore *mockdb.GlobalStore
-		return nil
+		if *useMockStore {
+			gDir, globalStore, err = createGlobalStore()
+			if err != nil {
+				return fmt.Errorf("Something went wrong; using mockStore enabled but globalStore is nil")
 			}
-
+			defer os.RemoveAll(gDir)
-	//check defines what will be checked during the test
-	check := func(ctx context.Context, id discover.NodeID) (bool, error) {
-		select {
-		case <-ctx.Done():
-			return false, ctx.Err()
-		case e := <-disconnectC:
-			log.Error(e.Error())
-			return false, fmt.Errorf("Disconnect event detected, network unhealthy")
-		default:
 		}
-		log.Trace(fmt.Sprintf("Checking node: %s", id))
+		// File retrieval check is repeated until all uploaded files are retrieved from all nodes
-		//select the local store for the given node
+		// or until the timeout is reached.
-		//if there are more than one chunk, test only succeeds if all expected chunks are found
+		allSuccess := false
-		allSuccess := true
+		for !allSuccess {
-
+			for _, id := range nodeIDs {
-		//all the chunk indexes which are supposed to be found for this node
-		localChunks := conf.idToChunksMap[id]
 				//for each expected chunk, check if it is in the local store
+				localChunks := conf.idToChunksMap[id]
+				localSuccess := true
 				for _, ch := range localChunks {
 					//get the real chunk by the index in the index array
 					chunk := conf.hashes[ch]
@@ -428,59 +411,38 @@ func runSyncTest(chunkCount int, nodeCount int, live bool, history bool) error {
 					//check if the expected chunk is indeed in the localstore
 					var err error
 					if *useMockStore {
-				if globalStore == nil {
-					return false, fmt.Errorf("Something went wrong; using mockStore enabled but globalStore is nil")
-				}
 						//use the globalStore if the mockStore should be used; in that case,
 						//the complete localStore stack is bypassed for getting the chunk
 						_, err = globalStore.Get(common.BytesToAddress(id.Bytes()), chunk)
 					} else {
 						//use the actual localstore
-				lstore := stores[id]
+						item, ok := sim.NodeItem(id, bucketKeyStore)
-				_, err = lstore.Get(context.TODO(), chunk)
+						if !ok {
+							return fmt.Errorf("Error accessing localstore")
+						}
+						lstore := item.(*storage.LocalStore)
+						_, err = lstore.Get(ctx, chunk)
 					}
 					if err != nil {
 						log.Warn(fmt.Sprintf("Chunk %s NOT found for id %s", chunk, id))
-				allSuccess = false
+						localSuccess = false
 					} else {
 						log.Debug(fmt.Sprintf("Chunk %s IS FOUND for id %s", chunk, id))
 					}
 				}
-
+				allSuccess = localSuccess
-		return allSuccess, nil
-	}
-
-	//for each tick, run the checks on all nodes
-	timingTicker := time.NewTicker(time.Second * 1)
-	defer timingTicker.Stop()
-	go func() {
-		for range timingTicker.C {
-			for i := 0; i < len(ids); i++ {
-				log.Trace(fmt.Sprintf("triggering step %d, id %s", i, ids[i]))
-				trigger <- ids[i]
 			}
 		}
-	}()
+		if !allSuccess {
-
+			return fmt.Errorf("Not all chunks succeeded!")
-	log.Info("Starting simulation run...")
+		}
-
+		return nil
-	timeout := MaxTimeout * time.Second
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
-	defer cancel()
-
-	//run the simulation
-	result := simulations.NewSimulation(net).Run(ctx, &simulations.Step{
-		Action:  action,
-		Trigger: trigger,
-		Expect: &simulations.Expectation{
-			Nodes: ids,
-			Check: check,
-		},
 	})
 
 	if result.Error != nil {
 		return result.Error
 	}
+
 	log.Info("Simulation terminated")
 	return nil
 }
@@ -489,20 +451,9 @@ func runSyncTest(chunkCount int, nodeCount int, live bool, history bool) error {
 //issues `RequestSubscriptionMsg` to peers, based on po, by iterating over
 //the kademlia's `EachBin` function.
 //returns the number of subscriptions requested
-func (r *TestRegistry) StartSyncing(ctx context.Context) (int, error) {
+func startSyncing(r *Registry, conf *synctestConfig) (int, error) {
 	var err error
 
-	if log.Lvl(*loglevel) == log.LvlDebug {
-		//PeerPot for this node
-		addr := common.Bytes2Hex(r.addr.OAddr)
-		pp := ppmap[addr]
-		//call Healthy RPC
-		h := r.delivery.overlay.Healthy(pp)
-		//print info
-		log.Debug(r.delivery.overlay.String())
-		log.Debug(fmt.Sprintf("IS HEALTHY: %t", h.GotNN && h.KnowNN && h.Full))
-	}
-
 	kad, ok := r.delivery.overlay.(*network.Kademlia)
 	if !ok {
 		return 0, fmt.Errorf("Not a Kademlia!")
@@ -512,14 +463,10 @@ func (r *TestRegistry) StartSyncing(ctx context.Context) (int, error) {
 	//iterate over each bin and solicit needed subscription to bins
 	kad.EachBin(r.addr.Over(), pof, 0, func(conn network.OverlayConn, po int) bool {
 		//identify begin and start index of the bin(s) we want to subscribe to
-		log.Debug(fmt.Sprintf("Requesting subscription by: registry %s from peer %s for bin: %d", r.addr.ID(), conf.addrToIdMap[string(conn.Address())], po))
+		histRange := &Range{}
-		var histRange *Range
-		if history {
-			histRange = &Range{}
-		}
 
 		subCnt++
-		err = r.RequestSubscription(conf.addrToIdMap[string(conn.Address())], NewStream("SYNC", FormatSyncBinKey(uint8(po)), live), histRange, Top)
+		err = r.RequestSubscription(conf.addrToIDMap[string(conn.Address())], NewStream("SYNC", FormatSyncBinKey(uint8(po)), true), histRange, Top)
 		if err != nil {
 			log.Error(fmt.Sprintf("Error in RequestSubsciption! %v", err))
 			return false
@@ -552,7 +499,7 @@ func mapKeysToNodes(conf *synctestConfig) {
 				return false
 			}
 			if pl == 256 || pl == po {
-				log.Trace(fmt.Sprintf("appending %s", conf.addrToIdMap[string(a)]))
+				log.Trace(fmt.Sprintf("appending %s", conf.addrToIDMap[string(a)]))
 				nns = append(nns, indexmap[string(a)])
 				nodemap[string(a)] = append(nodemap[string(a)], i)
 			}
@@ -567,26 +514,24 @@ func mapKeysToNodes(conf *synctestConfig) {
 	}
 	for addr, chunks := range nodemap {
 		//this selects which chunks are expected to be found with the given node
-		conf.idToChunksMap[conf.addrToIdMap[addr]] = chunks
+		conf.idToChunksMap[conf.addrToIDMap[addr]] = chunks
 	}
 	log.Debug(fmt.Sprintf("Map of expected chunks by ID: %v", conf.idToChunksMap))
 	conf.chunksToNodesMap = kmap
 }
 
 //upload a file(chunks) to a single local node store
-func uploadFileToSingleNodeStore(id discover.NodeID, chunkCount int) ([]storage.Address, error) {
+func uploadFileToSingleNodeStore(id discover.NodeID, chunkCount int, lstore *storage.LocalStore) ([]storage.Address, error) {
 	log.Debug(fmt.Sprintf("Uploading to node id: %s", id))
-	lstore := stores[id]
-	size := chunkSize
 	fileStore := storage.NewFileStore(lstore, storage.NewFileStoreParams())
+	size := chunkSize
 	var rootAddrs []storage.Address
 	for i := 0; i < chunkCount; i++ {
-		ctx := context.TODO()
+		rk, wait, err := fileStore.Store(context.TODO(), io.LimitReader(crand.Reader, int64(size)), int64(size), false)
-		rk, wait, err := fileStore.Store(ctx, io.LimitReader(crand.Reader, int64(size)), int64(size), false)
 		if err != nil {
 			return nil, err
 		}
-		err = wait(ctx)
+		err = wait(context.TODO())
 		if err != nil {
 			return nil, err
 		}
@@ -595,129 +540,3 @@ func uploadFileToSingleNodeStore(id discover.NodeID, chunkCount int) ([]storage.
 
 	return rootAddrs, nil
 }
-
-//initialize a network from a snapshot
-func initNetWithSnapshot(nodeCount int) (*simulations.Network, error) {
-
-	var a adapters.NodeAdapter
-	//add the streamer service to the node adapter
-
-	if *adapter == "exec" {
-		dirname, err := ioutil.TempDir(".", "")
-		if err != nil {
-			return nil, err
-		}
-		a = adapters.NewExecAdapter(dirname)
-	} else if *adapter == "tcp" {
-		a = adapters.NewTCPAdapter(services)
-	} else if *adapter == "sim" {
-		a = adapters.NewSimAdapter(services)
-	}
-
-	log.Info("Setting up Snapshot network")
-
-	net := simulations.NewNetwork(a, &simulations.NetworkConfig{
-		ID:             "0",
-		DefaultService: "streamer",
-	})
-
-	f, err := os.Open(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-	jsonbyte, err := ioutil.ReadAll(f)
-	if err != nil {
-		return nil, err
-	}
-	var snap simulations.Snapshot
-	err = json.Unmarshal(jsonbyte, &snap)
-	if err != nil {
-		return nil, err
-	}
-
-	//the snapshot probably has the property EnableMsgEvents not set
-	//just in case, set it to true!
-	//(we need this to wait for messages before uploading)
-	for _, n := range snap.Nodes {
-		n.Node.Config.EnableMsgEvents = true
-	}
-
-	log.Info("Waiting for p2p connections to be established...")
-
-	//now we can load the snapshot
-	err = net.Load(&snap)
-	if err != nil {
-		return nil, err
-	}
-	log.Info("Snapshot loaded")
-	return net, nil
-}
-
-//we want to wait for subscriptions to be established before uploading to test
-//that live syncing is working correctly
-func watchSubscriptionEvents(ctx context.Context, id discover.NodeID, client *rpc.Client, errc chan error, quitC chan struct{}) (doneC <-chan struct{}) {
-	events := make(chan *p2p.PeerEvent)
-	sub, err := client.Subscribe(context.Background(), "admin", events, "peerEvents")
-	if err != nil {
-		log.Error(err.Error())
-		errc <- fmt.Errorf("error getting peer events for node %v: %s", id, err)
-		return
-	}
-	c := make(chan struct{})
-
-	go func() {
-		defer func() {
-			log.Trace("watch subscription events: unsubscribe", "id", id)
-			sub.Unsubscribe()
-			close(c)
-		}()
-
-		for {
-			select {
-			case <-quitC:
-				return
-			case <-ctx.Done():
-				select {
-				case errc <- ctx.Err():
-				case <-quitC:
-				}
-				return
-			case e := <-events:
-				//just catch SubscribeMsg
-				if e.Type == p2p.PeerEventTypeMsgRecv && e.Protocol == "stream" && e.MsgCode != nil && *e.MsgCode == 4 {
-					errc <- nil
-				}
-			case err := <-sub.Err():
-				if err != nil {
-					select {
-					case errc <- fmt.Errorf("error getting peer events for node %v: %v", id, err):
-					case <-quitC:
-					}
-					return
-				}
-			}
-		}
-	}()
-	return c
-}
-
-//create a local store for the given node
-func createTestLocalStorageForId(id discover.NodeID, addr *network.BzzAddr) (storage.ChunkStore, error) {
-	var datadir string
-	var err error
-	datadir, err = ioutil.TempDir("", fmt.Sprintf("syncer-test-%s", id.TerminalString()))
-	if err != nil {
-		return nil, err
-	}
-	datadirs[id] = datadir
-	var store storage.ChunkStore
-	params := storage.NewDefaultLocalStoreParams()
-	params.ChunkDbPath = datadir
-	params.BaseKey = addr.Over()
-	store, err = storage.NewTestLocalStoreForAddr(params)
-	if err != nil {
-		return nil, err
-	}
-	return store, nil
-}

swarm/network/stream/syncer_test.go

@@ -23,18 +23,22 @@ import (
 	"io"
 	"io/ioutil"
 	"math"
+	"os"
 	"sync"
 	"testing"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/node"
+	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/p2p/discover"
-	"github.com/ethereum/go-ethereum/p2p/simulations"
+	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
-	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/ethereum/go-ethereum/swarm/log"
 	"github.com/ethereum/go-ethereum/swarm/network"
-	streamTesting "github.com/ethereum/go-ethereum/swarm/network/stream/testing"
+	"github.com/ethereum/go-ethereum/swarm/network/simulation"
+	"github.com/ethereum/go-ethereum/swarm/state"
 	"github.com/ethereum/go-ethereum/swarm/storage"
+	mockdb "github.com/ethereum/go-ethereum/swarm/storage/mock/db"
 )
 
 const dataChunkCount = 200
@@ -46,95 +50,139 @@ func TestSyncerSimulation(t *testing.T) {
 	testSyncBetweenNodes(t, 16, 1, dataChunkCount, true, 1)
 }
 
-func createMockStore(id discover.NodeID, addr *network.BzzAddr) (storage.ChunkStore, error) {
+func createMockStore(globalStore *mockdb.GlobalStore, id discover.NodeID, addr *network.BzzAddr) (lstore storage.ChunkStore, datadir string, err error) {
-	var err error
 	address := common.BytesToAddress(id.Bytes())
 	mockStore := globalStore.NewNodeStore(address)
 	params := storage.NewDefaultLocalStoreParams()
-	datadirs[id], err = ioutil.TempDir("", "localMockStore-"+id.TerminalString())
+
+	datadir, err = ioutil.TempDir("", "localMockStore-"+id.TerminalString())
 	if err != nil {
-		return nil, err
+		return nil, "", err
 	}
-	params.Init(datadirs[id])
+	params.Init(datadir)
 	params.BaseKey = addr.Over()
-	lstore, err := storage.NewLocalStore(params, mockStore)
+	lstore, err = storage.NewLocalStore(params, mockStore)
-	return lstore, nil
+	return lstore, datadir, nil
 }
 
 func testSyncBetweenNodes(t *testing.T, nodes, conns, chunkCount int, skipCheck bool, po uint8) {
-	defer setDefaultSkipCheck(defaultSkipCheck)
+	sim := simulation.New(map[string]simulation.ServiceFunc{
-	defaultSkipCheck = skipCheck
+		"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
-	//data directories for each node and store
+			var store storage.ChunkStore
-	datadirs = make(map[discover.NodeID]string)
+			var globalStore *mockdb.GlobalStore
-	if *useMockStore {
+			var gDir, datadir string
-		createStoreFunc = createMockStore
-		createGlobalStore()
-	} else {
-		createStoreFunc = createTestLocalStorageFromSim
-	}
-	defer datadirsCleanup()
 
-	registries = make(map[discover.NodeID]*TestRegistry)
+			id := ctx.Config.ID
-	toAddr = func(id discover.NodeID) *network.BzzAddr {
 			addr := network.NewAddrFromNodeID(id)
 			//hack to put addresses in same space
 			addr.OAddr[0] = byte(0)
-		return addr
+
+			if *useMockStore {
+				gDir, globalStore, err = createGlobalStore()
+				if err != nil {
+					return nil, nil, fmt.Errorf("Something went wrong; using mockStore enabled but globalStore is nil")
 				}
-	conf := &streamTesting.RunConfig{
+				store, datadir, err = createMockStore(globalStore, id, addr)
-		Adapter:         *adapter,
+			} else {
-		NodeCount:       nodes,
+				store, datadir, err = createTestLocalStorageForID(id, addr)
-		ConnLevel:       conns,
-		ToAddr:          toAddr,
-		Services:        services,
-		EnableMsgEvents: false,
 			}
-	// HACK: these are global variables in the test so that they are available for
+			if err != nil {
-	// the service constructor function
+				return nil, nil, err
-	// TODO: will this work with exec/docker adapter?
+			}
-	// localstore of nodes made available for action and check calls
+			bucket.Store(bucketKeyStore, store)
-	stores = make(map[discover.NodeID]storage.ChunkStore)
+			cleanup = func() {
-	deliveries = make(map[discover.NodeID]*Delivery)
+				store.Close()
+				os.RemoveAll(datadir)
+				if *useMockStore {
+					err := globalStore.Close()
+					if err != nil {
+						log.Error("Error closing global store! %v", "err", err)
+					}
+					os.RemoveAll(gDir)
+				}
+			}
+			localStore := store.(*storage.LocalStore)
+			db := storage.NewDBAPI(localStore)
+			bucket.Store(bucketKeyDB, db)
+			kad := network.NewKademlia(addr.Over(), network.NewKadParams())
+			delivery := NewDelivery(kad, db)
+			bucket.Store(bucketKeyDelivery, delivery)
+
+			r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
+				SkipCheck: skipCheck,
+			})
+
+			fileStore := storage.NewFileStore(storage.NewNetStore(localStore, nil), storage.NewFileStoreParams())
+			bucket.Store(bucketKeyFileStore, fileStore)
+
+			return r, cleanup, nil
+
+		},
+	})
+	defer sim.Close()
+
 	// create context for simulation run
 	timeout := 30 * time.Second
 	ctx, cancel := context.WithTimeout(context.Background(), timeout)
 	// defer cancel should come before defer simulation teardown
 	defer cancel()
 
-	// create simulation network with the config
+	_, err := sim.AddNodesAndConnectChain(nodes)
-	sim, teardown, err := streamTesting.NewSimulation(conf)
+	if err != nil {
-	var rpcSubscriptionsWg sync.WaitGroup
+		t.Fatal(err)
-	defer func() {
+	}
-		rpcSubscriptionsWg.Wait()
+	result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
-		teardown()
+		nodeIDs := sim.UpNodeIDs()
+
+		nodeIndex := make(map[discover.NodeID]int)
+		for i, id := range nodeIDs {
+			nodeIndex[id] = i
+		}
+
+		disconnections := sim.PeerEvents(
+			context.Background(),
+			sim.NodeIDs(),
+			simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
+		)
+
+		go func() {
+			for d := range disconnections {
+				if d.Error != nil {
+					log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
+					t.Fatal(d.Error)
+				}
+			}
 		}()
+
+		// each node Subscribes to each other's swarmChunkServerStreamName
+		for j := 0; j < nodes-1; j++ {
+			id := nodeIDs[j]
+			client, err := sim.Net.GetNode(id).Client()
+			if err != nil {
+				t.Fatal(err)
+			}
+			sid := nodeIDs[j+1]
+			client.CallContext(ctx, nil, "stream_subscribeStream", sid, NewStream("SYNC", FormatSyncBinKey(1), false), NewRange(0, 0), Top)
+			if err != nil {
+				return err
+			}
+			if j > 0 || nodes == 2 {
+				item, ok := sim.NodeItem(nodeIDs[j], bucketKeyFileStore)
+				if !ok {
+					return fmt.Errorf("No filestore")
+				}
+				fileStore := item.(*storage.FileStore)
+				size := chunkCount * chunkSize
+				_, wait, err := fileStore.Store(ctx, io.LimitReader(crand.Reader, int64(size)), int64(size), false)
 				if err != nil {
 					t.Fatal(err.Error())
 				}
-
+				wait(ctx)
-	nodeIndex := make(map[discover.NodeID]int)
-	for i, id := range sim.IDs {
-		nodeIndex[id] = i
-		if !*useMockStore {
-			stores[id] = sim.Stores[i]
-			sim.Stores[i] = stores[id]
 			}
 		}
-	// peerCount function gives the number of peer connections for a nodeID
+		// here we distribute chunks of a random file into stores 1...nodes
-	// this is needed for the service run function to wait until
+		if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
-	// each protocol  instance runs and the streamer peers are available
+			return err
-	peerCount = func(id discover.NodeID) int {
-		if sim.IDs[0] == id || sim.IDs[nodes-1] == id {
-			return 1
-		}
-		return 2
-	}
-	waitPeerErrC = make(chan error)
-
-	// create DBAPI-s for all nodes
-	dbs := make([]*storage.DBAPI, nodes)
-	for i := 0; i < nodes; i++ {
-		dbs[i] = storage.NewDBAPI(sim.Stores[i].(*storage.LocalStore))
 		}
 
 		// collect hashes in po 1 bin for each node
@@ -145,93 +193,31 @@ func testSyncBetweenNodes(t *testing.T, nodes, conns, chunkCount int, skipCheck
 			if i < nodes-1 {
 				hashCounts[i] = hashCounts[i+1]
 			}
-		dbs[i].Iterator(0, math.MaxUint64, po, func(addr storage.Address, index uint64) bool {
+			item, ok := sim.NodeItem(nodeIDs[i], bucketKeyDB)
+			if !ok {
+				return fmt.Errorf("No DB")
+			}
+			db := item.(*storage.DBAPI)
+			db.Iterator(0, math.MaxUint64, po, func(addr storage.Address, index uint64) bool {
 				hashes[i] = append(hashes[i], addr)
 				totalHashes++
 				hashCounts[i]++
 				return true
 			})
 		}
-
-	// errc is error channel for simulation
-	errc := make(chan error, 1)
-	quitC := make(chan struct{})
-	defer close(quitC)
-
-	// action is subscribe
-	action := func(ctx context.Context) error {
-		// need to wait till an aynchronous process registers the peers in streamer.peers
-		// that is used by Subscribe
-		// the global peerCount function tells how many connections each node has
-		// TODO: this is to be reimplemented with peerEvent watcher without global var
-		i := 0
-		for err := range waitPeerErrC {
-			if err != nil {
-				return fmt.Errorf("error waiting for peers: %s", err)
-			}
-			i++
-			if i == nodes {
-				break
-			}
-		}
-		// each node Subscribes to each other's swarmChunkServerStreamName
-		for j := 0; j < nodes-1; j++ {
-			id := sim.IDs[j]
-			sim.Stores[j] = stores[id]
-			err := sim.CallClient(id, func(client *rpc.Client) error {
-				// report disconnect events to the error channel cos peers should not disconnect
-				doneC, err := streamTesting.WatchDisconnections(id, client, errc, quitC)
-				if err != nil {
-					return err
-				}
-				rpcSubscriptionsWg.Add(1)
-				go func() {
-					<-doneC
-					rpcSubscriptionsWg.Done()
-				}()
-				ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
-				defer cancel()
-				// start syncing, i.e., subscribe to upstream peers po 1 bin
-				sid := sim.IDs[j+1]
-				return client.CallContext(ctx, nil, "stream_subscribeStream", sid, NewStream("SYNC", FormatSyncBinKey(1), false), NewRange(0, 0), Top)
-			})
-			if err != nil {
-				return err
-			}
-		}
-		// here we distribute chunks of a random file into stores 1...nodes
-		rrFileStore := storage.NewFileStore(newRoundRobinStore(sim.Stores[1:]...), storage.NewFileStoreParams())
-		size := chunkCount * chunkSize
-		_, wait, err := rrFileStore.Store(ctx, io.LimitReader(crand.Reader, int64(size)), int64(size), false)
-		if err != nil {
-			t.Fatal(err.Error())
-		}
-		// need to wait cos we then immediately collect the relevant bin content
-		wait(ctx)
-		if err != nil {
-			t.Fatal(err.Error())
-		}
-
-		return nil
-	}
-
-	// this makes sure check is not called before the previous call finishes
-	check := func(ctx context.Context, id discover.NodeID) (bool, error) {
-		select {
-		case err := <-errc:
-			return false, err
-		case <-ctx.Done():
-			return false, ctx.Err()
-		default:
-		}
-
-		i := nodeIndex[id]
 		var total, found int
+		for _, node := range nodeIDs {
+			i := nodeIndex[node]
 
 			for j := i; j < nodes; j++ {
 				total += len(hashes[j])
 				for _, key := range hashes[j] {
-				chunk, err := dbs[i].Get(ctx, key)
+					item, ok := sim.NodeItem(nodeIDs[j], bucketKeyDB)
+					if !ok {
+						return fmt.Errorf("No DB")
+					}
+					db := item.(*storage.DBAPI)
+					chunk, err := db.Get(ctx, key)
 					if err == storage.ErrFetching {
 						<-chunk.ReqC
 					} else if err != nil {
@@ -242,26 +228,15 @@ func testSyncBetweenNodes(t *testing.T, nodes, conns, chunkCount int, skipCheck
 					found++
 				}
 			}
-		log.Debug("sync check", "node", id, "index", i, "bin", po, "found", found, "total", total)
+			log.Debug("sync check", "node", node, "index", i, "bin", po, "found", found, "total", total)
-		return total == found, nil
 		}
+		if total == found && total > 0 {
+			return nil
+		}
+		return fmt.Errorf("Total not equallying found: total is %d", total)
+	})
 
-	conf.Step = &simulations.Step{
-		Action:  action,
-		Trigger: streamTesting.Trigger(500*time.Millisecond, quitC, sim.IDs[0:nodes-1]...),
-		Expect: &simulations.Expectation{
-			Nodes: sim.IDs[0:1],
-			Check: check,
-		},
-	}
-	startedAt := time.Now()
-	result, err := sim.Run(ctx, conf)
-	finishedAt := time.Now()
-	if err != nil {
-		t.Fatalf("Setting up simulation failed: %v", err)
-	}
 	if result.Error != nil {
-		t.Fatalf("Simulation failed: %s", result.Error)
+		t.Fatal(result.Error)
 	}
-	streamTesting.CheckResult(t, result, startedAt, finishedAt)
 }

swarm/network/stream/testing/testing.go

@@ -1,293 +0,0 @@
-// Copyright 2018 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package testing
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"io/ioutil"
-	"math/rand"
-	"os"
-	"sync"
-	"testing"
-	"time"
-
-	"github.com/ethereum/go-ethereum/p2p"
-	"github.com/ethereum/go-ethereum/p2p/discover"
-	"github.com/ethereum/go-ethereum/p2p/simulations"
-	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
-	"github.com/ethereum/go-ethereum/rpc"
-	"github.com/ethereum/go-ethereum/swarm/log"
-	"github.com/ethereum/go-ethereum/swarm/network"
-	"github.com/ethereum/go-ethereum/swarm/storage"
-)
-
-type Simulation struct {
-	Net    *simulations.Network
-	Stores []storage.ChunkStore
-	Addrs  []network.Addr
-	IDs    []discover.NodeID
-}
-
-func SetStores(addrs ...network.Addr) ([]storage.ChunkStore, func(), error) {
-	var datadirs []string
-	stores := make([]storage.ChunkStore, len(addrs))
-	var err error
-	for i, addr := range addrs {
-		var datadir string
-		datadir, err = ioutil.TempDir("", "streamer")
-		if err != nil {
-			break
-		}
-		var store storage.ChunkStore
-		params := storage.NewDefaultLocalStoreParams()
-		params.Init(datadir)
-		params.BaseKey = addr.Over()
-		store, err = storage.NewTestLocalStoreForAddr(params)
-		if err != nil {
-			break
-		}
-		datadirs = append(datadirs, datadir)
-		stores[i] = store
-	}
-	teardown := func() {
-		for i, datadir := range datadirs {
-			stores[i].Close()
-			os.RemoveAll(datadir)
-		}
-	}
-	return stores, teardown, err
-}
-
-func NewAdapter(adapterType string, services adapters.Services) (adapter adapters.NodeAdapter, teardown func(), err error) {
-	teardown = func() {}
-	switch adapterType {
-	case "sim":
-		adapter = adapters.NewSimAdapter(services)
-	case "exec":
-		baseDir, err0 := ioutil.TempDir("", "swarm-test")
-		if err0 != nil {
-			return nil, teardown, err0
-		}
-		teardown = func() { os.RemoveAll(baseDir) }
-		adapter = adapters.NewExecAdapter(baseDir)
-	case "docker":
-		adapter, err = adapters.NewDockerAdapter()
-		if err != nil {
-			return nil, teardown, err
-		}
-	default:
-		return nil, teardown, errors.New("adapter needs to be one of sim, exec, docker")
-	}
-	return adapter, teardown, nil
-}
-
-func CheckResult(t *testing.T, result *simulations.StepResult, startedAt, finishedAt time.Time) {
-	t.Logf("Simulation passed in %s", result.FinishedAt.Sub(result.StartedAt))
-	if len(result.Passes) > 1 {
-		var min, max time.Duration
-		var sum int
-		for _, pass := range result.Passes {
-			duration := pass.Sub(result.StartedAt)
-			if sum == 0 || duration < min {
-				min = duration
-			}
-			if duration > max {
-				max = duration
-			}
-			sum += int(duration.Nanoseconds())
-		}
-		t.Logf("Min: %s, Max: %s, Average: %s", min, max, time.Duration(sum/len(result.Passes))*time.Nanosecond)
-	}
-	t.Logf("Setup: %s, Shutdown: %s", result.StartedAt.Sub(startedAt), finishedAt.Sub(result.FinishedAt))
-}
-
-type RunConfig struct {
-	Adapter         string
-	Step            *simulations.Step
-	NodeCount       int
-	ConnLevel       int
-	ToAddr          func(discover.NodeID) *network.BzzAddr
-	Services        adapters.Services
-	DefaultService  string
-	EnableMsgEvents bool
-}
-
-func NewSimulation(conf *RunConfig) (*Simulation, func(), error) {
-	// create network
-	nodes := conf.NodeCount
-	adapter, adapterTeardown, err := NewAdapter(conf.Adapter, conf.Services)
-	if err != nil {
-		return nil, adapterTeardown, err
-	}
-	defaultService := "streamer"
-	if conf.DefaultService != "" {
-		defaultService = conf.DefaultService
-	}
-	net := simulations.NewNetwork(adapter, &simulations.NetworkConfig{
-		ID:             "0",
-		DefaultService: defaultService,
-	})
-	teardown := func() {
-		adapterTeardown()
-		net.Shutdown()
-	}
-	ids := make([]discover.NodeID, nodes)
-	addrs := make([]network.Addr, nodes)
-	// start nodes
-	for i := 0; i < nodes; i++ {
-		nodeconf := adapters.RandomNodeConfig()
-		nodeconf.EnableMsgEvents = conf.EnableMsgEvents
-		node, err := net.NewNodeWithConfig(nodeconf)
-		if err != nil {
-			return nil, teardown, fmt.Errorf("error creating node: %s", err)
-		}
-		ids[i] = node.ID()
-		addrs[i] = conf.ToAddr(ids[i])
-	}
-	// set nodes number of Stores available
-	stores, storeTeardown, err := SetStores(addrs...)
-	teardown = func() {
-		net.Shutdown()
-		adapterTeardown()
-		storeTeardown()
-	}
-	if err != nil {
-		return nil, teardown, err
-	}
-	s := &Simulation{
-		Net:    net,
-		Stores: stores,
-		IDs:    ids,
-		Addrs:  addrs,
-	}
-	return s, teardown, nil
-}
-
-func (s *Simulation) Run(ctx context.Context, conf *RunConfig) (*simulations.StepResult, error) {
-	// bring up nodes, launch the servive
-	nodes := conf.NodeCount
-	conns := conf.ConnLevel
-	for i := 0; i < nodes; i++ {
-		if err := s.Net.Start(s.IDs[i]); err != nil {
-			return nil, fmt.Errorf("error starting node %s: %s", s.IDs[i].TerminalString(), err)
-		}
-	}
-	// run a simulation which connects the 10 nodes in a chain
-	wg := sync.WaitGroup{}
-	for i := range s.IDs {
-		// collect the overlay addresses, to
-		for j := 0; j < conns; j++ {
-			var k int
-			if j == 0 {
-				k = i - 1
-			} else {
-				k = rand.Intn(len(s.IDs))
-			}
-			if i > 0 {
-				wg.Add(1)
-				go func(i, k int) {
-					defer wg.Done()
-					s.Net.Connect(s.IDs[i], s.IDs[k])
-				}(i, k)
-			}
-		}
-	}
-	wg.Wait()
-	log.Info(fmt.Sprintf("simulation with %v nodes", len(s.Addrs)))
-
-	// create an only locally retrieving FileStore for the pivot node to test
-	// if retriee requests have arrived
-	result := simulations.NewSimulation(s.Net).Run(ctx, conf.Step)
-	return result, nil
-}
-
-// WatchDisconnections subscribes to admin peerEvents and sends peer event drop
-// errors to the errc channel. Channel quitC signals the termination of the event loop.
-// Returned doneC will be closed after the rpc subscription is unsubscribed,
-// signaling that simulations network is safe to shutdown.
-func WatchDisconnections(id discover.NodeID, client *rpc.Client, errc chan error, quitC chan struct{}) (doneC <-chan struct{}, err error) {
-	events := make(chan *p2p.PeerEvent)
-	sub, err := client.Subscribe(context.Background(), "admin", events, "peerEvents")
-	if err != nil {
-		return nil, fmt.Errorf("error getting peer events for node %v: %s", id, err)
-	}
-	c := make(chan struct{})
-	go func() {
-		defer func() {
-			log.Trace("watch disconnections: unsubscribe", "id", id)
-			sub.Unsubscribe()
-			close(c)
-		}()
-		for {
-			select {
-			case <-quitC:
-				return
-			case e := <-events:
-				if e.Type == p2p.PeerEventTypeDrop {
-					select {
-					case errc <- fmt.Errorf("peerEvent for node %v: %v", id, e):
-					case <-quitC:
-						return
-					}
-				}
-			case err := <-sub.Err():
-				if err != nil {
-					select {
-					case errc <- fmt.Errorf("error getting peer events for node %v: %v", id, err):
-					case <-quitC:
-						return
-					}
-				}
-			}
-		}
-	}()
-	return c, nil
-}
-
-func Trigger(d time.Duration, quitC chan struct{}, ids ...discover.NodeID) chan discover.NodeID {
-	trigger := make(chan discover.NodeID)
-	go func() {
-		defer close(trigger)
-		ticker := time.NewTicker(d)
-		defer ticker.Stop()
-		// we are only testing the pivot node (net.Nodes[0])
-		for range ticker.C {
-			for _, id := range ids {
-				select {
-				case trigger <- id:
-				case <-quitC:
-					return
-				}
-			}
-		}
-	}()
-	return trigger
-}
-
-func (sim *Simulation) CallClient(id discover.NodeID, f func(*rpc.Client) error) error {
-	node := sim.Net.GetNode(id)
-	if node == nil {
-		return fmt.Errorf("unknown node: %s", id)
-	}
-	client, err := node.Client()
-	if err != nil {
-		return fmt.Errorf("error getting node client: %s", err)
-	}
-	return f(client)
-}