// 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 stream
import (
"context"
crand "crypto/rand"
"encoding/binary"
"fmt"
"io"
"sync"
"testing"
"time"
"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/rpc"
"github.com/ethereum/go-ethereum/swarm/network"
streamTesting "github.com/ethereum/go-ethereum/swarm/network/stream/testing"
"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)
testIntervals(t, true, NewRange(9, 26), false)
testIntervals(t, true, nil, true)
testIntervals(t, false, NewRange(9, 26), true)
testIntervals(t, true, NewRange(9, 26), true)
}
func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
nodes := 2
chunkCount := dataChunkCount
defer setDefaultSkipCheck(defaultSkipCheck)
defaultSkipCheck = skipCheck
toAddr = network.NewAddrFromNodeID
conf := &streamTesting.RunConfig{
Adapter: *adapter,
NodeCount: nodes,
ConnLevel: 1,
ToAddr: toAddr,
Services: services,
DefaultService: "intervalsStreamer",
}
sim, teardown, err := streamTesting.NewSimulation(conf)
var rpcSubscriptionsWg sync.WaitGroup
defer func() {
rpcSubscriptionsWg.Wait()
teardown()
}()
if err != nil {
t.Fatal(err)
}
stores = make(map[discover.NodeID]storage.ChunkStore)
deliveries = make(map[discover.NodeID]*Delivery)
for i, id := range sim.IDs {
stores[id] = sim.Stores[i]
}
peerCount = func(id discover.NodeID) int {
return 1
}
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 {
t.Fatal(err)
}
err = wait(ctx)
if err != nil {
t.Fatal(err)
}
errc := make(chan error, 1)
waitPeerErrC = make(chan error)
quitC := make(chan struct{})
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
}
liveErrC := make(chan error)
historyErrC := make(chan error)
go func() {
if !live {
close(liveErrC)
return
}
var err error
defer func() {
liveErrC <- err
}()
// live stream
liveHashesChan := make(chan []byte)
liveSubscription, err := client.Subscribe(ctx, "stream", liveHashesChan, "getHashes", sid, NewStream(externalStreamName, "", true))
if err != nil {
return
}
defer liveSubscription.Unsubscribe()
i := externalStreamSessionAt
// we have subscribed, enable notifications
err = client.CallContext(ctx, nil, "stream_enableNotifications", sid, NewStream(externalStreamName, "", true))
if err != nil {
return
}
for {
select {
case hash := <-liveHashesChan:
h := binary.BigEndian.Uint64(hash)
if h != i {
err = fmt.Errorf("expected live hash %d, got %d", i, h)
return
}
i++
if i > externalStreamMaxKeys {
return
}
case err = <-liveSubscription.Err():
return
case <-ctx.Done():
return
}
}
}()
go func() {
if live && history == nil {
close(historyErrC)
return
}
var err error
defer func() {
historyErrC <- err
}()
// history stream
historyHashesChan := make(chan []byte)
historySubscription, err := client.Subscribe(ctx, "stream", historyHashesChan, "getHashes", sid, NewStream(externalStreamName, "", false))
if err != nil {
return
}
defer historySubscription.Unsubscribe()
var i uint64
historyTo := externalStreamMaxKeys
if history != nil {
i = history.From
if history.To != 0 {
historyTo = history.To
}
}
// we have subscribed, enable notifications
err = client.CallContext(ctx, nil, "stream_enableNotifications", sid, NewStream(externalStreamName, "", false))
if err != nil {
return
}
for {
select {
case hash := <-historyHashesChan:
h := binary.BigEndian.Uint64(hash)
if h != i {
err = fmt.Errorf("expected history hash %d, got %d", i, h)
return
}
i++
if i > historyTo {
return
}
case err = <-historySubscription.Err():
return
case <-ctx.Done():
return
}
}
}()
if err := <-liveErrC; err != nil {
return err
}
if err := <-historyErrC; err != nil {
return err
}
return nil
})
return err
}
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{
Action: action,
Trigger: streamTesting.Trigger(10*time.Millisecond, quitC, sim.IDs[0]),
Expect: &simulations.Expectation{
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)
}
if result.Error != nil {
t.Fatalf("Simulation failed: %s", result.Error)
}
streamTesting.CheckResult(t, result, startedAt, finishedAt)
}
