plugeth/swarm/network/stream/streamer_test.go
2019-05-10 12:26:49 +02:00

1215 lines
27 KiB
Go

// 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 (
"bytes"
"context"
"errors"
"fmt"
"os"
"strconv"
"strings"
"sync"
"testing"
"time"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
"github.com/ethereum/go-ethereum/swarm/network"
"github.com/ethereum/go-ethereum/swarm/network/simulation"
"github.com/ethereum/go-ethereum/swarm/state"
"github.com/ethereum/go-ethereum/swarm/testutil"
"golang.org/x/crypto/sha3"
)
func TestStreamerSubscribe(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
stream := NewStream("foo", "", true)
err = streamer.Subscribe(tester.Nodes[0].ID(), stream, NewRange(0, 0), Top)
if err == nil || err.Error() != "stream foo not registered" {
t.Fatalf("Expected error %v, got %v", "stream foo not registered", err)
}
}
func TestStreamerRequestSubscription(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
stream := NewStream("foo", "", false)
err = streamer.RequestSubscription(tester.Nodes[0].ID(), stream, &Range{}, Top)
if err == nil || err.Error() != "stream foo not registered" {
t.Fatalf("Expected error %v, got %v", "stream foo not registered", err)
}
}
var (
hash0 = sha3.Sum256([]byte{0})
hash1 = sha3.Sum256([]byte{1})
hash2 = sha3.Sum256([]byte{2})
hashesTmp = append(hash0[:], hash1[:]...)
hashes = append(hashesTmp, hash2[:]...)
corruptHashes = append(hashes[:40])
)
type testClient struct {
t string
wait0 chan bool
wait2 chan bool
batchDone chan bool
receivedHashes map[string][]byte
}
func newTestClient(t string) *testClient {
return &testClient{
t: t,
wait0: make(chan bool),
wait2: make(chan bool),
batchDone: make(chan bool),
receivedHashes: make(map[string][]byte),
}
}
func (self *testClient) NeedData(ctx context.Context, hash []byte) func(context.Context) error {
self.receivedHashes[string(hash)] = hash
if bytes.Equal(hash, hash0[:]) {
return func(context.Context) error {
<-self.wait0
return nil
}
} else if bytes.Equal(hash, hash2[:]) {
return func(context.Context) error {
<-self.wait2
return nil
}
}
return nil
}
func (self *testClient) BatchDone(Stream, uint64, []byte, []byte) func() (*TakeoverProof, error) {
close(self.batchDone)
return nil
}
func (self *testClient) Close() {}
type testServer struct {
t string
sessionIndex uint64
}
func newTestServer(t string, sessionIndex uint64) *testServer {
return &testServer{
t: t,
sessionIndex: sessionIndex,
}
}
func (s *testServer) SessionIndex() (uint64, error) {
return s.sessionIndex, nil
}
func (self *testServer) SetNextBatch(from uint64, to uint64) ([]byte, uint64, uint64, *HandoverProof, error) {
return make([]byte, HashSize), from + 1, to + 1, nil, nil
}
func (self *testServer) GetData(context.Context, []byte) ([]byte, error) {
return nil, nil
}
func (self *testServer) Close() {
}
func TestStreamerDownstreamSubscribeUnsubscribeMsgExchange(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
streamer.RegisterClientFunc("foo", func(p *Peer, t string, live bool) (Client, error) {
return newTestClient(t), nil
})
node := tester.Nodes[0]
stream := NewStream("foo", "", true)
err = streamer.Subscribe(node.ID(), stream, NewRange(5, 8), Top)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
err = tester.TestExchanges(
p2ptest.Exchange{
Label: "Subscribe message",
Expects: []p2ptest.Expect{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: node.ID(),
},
},
},
// trigger OfferedHashesMsg to actually create the client
p2ptest.Exchange{
Label: "OfferedHashes message",
Triggers: []p2ptest.Trigger{
{
Code: 1,
Msg: &OfferedHashesMsg{
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: hashes,
From: 5,
To: 8,
Stream: stream,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 2,
Msg: &WantedHashesMsg{
Stream: stream,
Want: []byte{5},
From: 9,
To: 0,
},
Peer: node.ID(),
},
},
},
)
if err != nil {
t.Fatal(err)
}
err = streamer.Unsubscribe(node.ID(), stream)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Unsubscribe message",
Expects: []p2ptest.Expect{
{
Code: 0,
Msg: &UnsubscribeMsg{
Stream: stream,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
}
func TestStreamerUpstreamSubscribeUnsubscribeMsgExchange(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
stream := NewStream("foo", "", false)
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
return newTestServer(t, 10), nil
})
node := tester.Nodes[0]
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 1,
Msg: &OfferedHashesMsg{
Stream: stream,
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: make([]byte, HashSize),
From: 6,
To: 9,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "unsubscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 0,
Msg: &UnsubscribeMsg{
Stream: stream,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
}
func TestStreamerUpstreamSubscribeUnsubscribeMsgExchangeLive(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
stream := NewStream("foo", "", true)
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
return newTestServer(t, 0), nil
})
node := tester.Nodes[0]
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
Priority: Top,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 1,
Msg: &OfferedHashesMsg{
Stream: stream,
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: make([]byte, HashSize),
From: 1,
To: 0,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "unsubscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 0,
Msg: &UnsubscribeMsg{
Stream: stream,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
}
func TestStreamerUpstreamSubscribeErrorMsgExchange(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
return newTestServer(t, 0), nil
})
stream := NewStream("bar", "", true)
node := tester.Nodes[0]
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 7,
Msg: &SubscribeErrorMsg{
Error: "stream bar not registered",
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
}
func TestStreamerUpstreamSubscribeLiveAndHistory(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
stream := NewStream("foo", "", true)
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
return newTestServer(t, 10), nil
})
node := tester.Nodes[0]
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 1,
Msg: &OfferedHashesMsg{
Stream: NewStream("foo", "", false),
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: make([]byte, HashSize),
From: 6,
To: 9,
},
Peer: node.ID(),
},
{
Code: 1,
Msg: &OfferedHashesMsg{
Stream: stream,
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
From: 11,
To: 0,
Hashes: make([]byte, HashSize),
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
}
func TestStreamerDownstreamCorruptHashesMsgExchange(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
stream := NewStream("foo", "", true)
var tc *testClient
streamer.RegisterClientFunc("foo", func(p *Peer, t string, live bool) (Client, error) {
tc = newTestClient(t)
return tc, nil
})
node := tester.Nodes[0]
err = streamer.Subscribe(node.ID(), stream, NewRange(5, 8), Top)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Expects: []p2ptest.Expect{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: node.ID(),
},
},
},
p2ptest.Exchange{
Label: "Corrupt offered hash message",
Triggers: []p2ptest.Trigger{
{
Code: 1,
Msg: &OfferedHashesMsg{
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: corruptHashes,
From: 5,
To: 8,
Stream: stream,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
expectedError := errors.New("subprotocol error")
if err := tester.TestDisconnected(&p2ptest.Disconnect{Peer: node.ID(), Error: expectedError}); err != nil {
t.Fatal(err)
}
}
func TestStreamerDownstreamOfferedHashesMsgExchange(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
stream := NewStream("foo", "", true)
var tc *testClient
streamer.RegisterClientFunc("foo", func(p *Peer, t string, live bool) (Client, error) {
tc = newTestClient(t)
return tc, nil
})
node := tester.Nodes[0]
err = streamer.Subscribe(node.ID(), stream, NewRange(5, 8), Top)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Expects: []p2ptest.Expect{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: node.ID(),
},
},
},
p2ptest.Exchange{
Label: "WantedHashes message",
Triggers: []p2ptest.Trigger{
{
Code: 1,
Msg: &OfferedHashesMsg{
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: hashes,
From: 5,
To: 8,
Stream: stream,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 2,
Msg: &WantedHashesMsg{
Stream: stream,
Want: []byte{5},
From: 9,
To: 0,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
if len(tc.receivedHashes) != 3 {
t.Fatalf("Expected number of received hashes %v, got %v", 3, len(tc.receivedHashes))
}
close(tc.wait0)
timeout := time.NewTimer(100 * time.Millisecond)
defer timeout.Stop()
select {
case <-tc.batchDone:
t.Fatal("batch done early")
case <-timeout.C:
}
close(tc.wait2)
timeout2 := time.NewTimer(10000 * time.Millisecond)
defer timeout2.Stop()
select {
case <-tc.batchDone:
case <-timeout2.C:
t.Fatal("timeout waiting batchdone call")
}
}
func TestStreamerRequestSubscriptionQuitMsgExchange(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(nil)
if err != nil {
t.Fatal(err)
}
defer teardown()
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
return newTestServer(t, 10), nil
})
node := tester.Nodes[0]
stream := NewStream("foo", "", true)
err = streamer.RequestSubscription(node.ID(), stream, NewRange(5, 8), Top)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
err = tester.TestExchanges(
p2ptest.Exchange{
Label: "RequestSubscription message",
Expects: []p2ptest.Expect{
{
Code: 8,
Msg: &RequestSubscriptionMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: node.ID(),
},
},
},
p2ptest.Exchange{
Label: "Subscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 1,
Msg: &OfferedHashesMsg{
Stream: NewStream("foo", "", false),
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: make([]byte, HashSize),
From: 6,
To: 9,
},
Peer: node.ID(),
},
{
Code: 1,
Msg: &OfferedHashesMsg{
Stream: stream,
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
From: 11,
To: 0,
Hashes: make([]byte, HashSize),
},
Peer: node.ID(),
},
},
},
)
if err != nil {
t.Fatal(err)
}
err = streamer.Quit(node.ID(), stream)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Quit message",
Expects: []p2ptest.Expect{
{
Code: 9,
Msg: &QuitMsg{
Stream: stream,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
historyStream := getHistoryStream(stream)
err = streamer.Quit(node.ID(), historyStream)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Quit message",
Expects: []p2ptest.Expect{
{
Code: 9,
Msg: &QuitMsg{
Stream: historyStream,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
}
// TestMaxPeerServersWithUnsubscribe creates a registry with a limited
// number of stream servers, and performs a test with subscriptions and
// unsubscriptions, checking if unsubscriptions will remove streams,
// leaving place for new streams.
func TestMaxPeerServersWithUnsubscribe(t *testing.T) {
var maxPeerServers = 6
tester, streamer, _, teardown, err := newStreamerTester(&RegistryOptions{
Syncing: SyncingDisabled,
MaxPeerServers: maxPeerServers,
})
if err != nil {
t.Fatal(err)
}
defer teardown()
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
return newTestServer(t, 0), nil
})
node := tester.Nodes[0]
for i := 0; i < maxPeerServers+10; i++ {
stream := NewStream("foo", strconv.Itoa(i), true)
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
Priority: Top,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 1,
Msg: &OfferedHashesMsg{
Stream: stream,
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: make([]byte, HashSize),
From: 1,
To: 0,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "unsubscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 0,
Msg: &UnsubscribeMsg{
Stream: stream,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
}
}
// TestMaxPeerServersWithoutUnsubscribe creates a registry with a limited
// number of stream servers, and performs subscriptions to detect subscriptions
// error message exchange.
func TestMaxPeerServersWithoutUnsubscribe(t *testing.T) {
var maxPeerServers = 6
tester, streamer, _, teardown, err := newStreamerTester(&RegistryOptions{
MaxPeerServers: maxPeerServers,
})
if err != nil {
t.Fatal(err)
}
defer teardown()
streamer.RegisterServerFunc("foo", func(p *Peer, t string, live bool) (Server, error) {
return newTestServer(t, 0), nil
})
node := tester.Nodes[0]
for i := 0; i < maxPeerServers+10; i++ {
stream := NewStream("foo", strconv.Itoa(i), true)
if i >= maxPeerServers {
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
Priority: Top,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 7,
Msg: &SubscribeErrorMsg{
Error: ErrMaxPeerServers.Error(),
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
continue
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Triggers: []p2ptest.Trigger{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
Priority: Top,
},
Peer: node.ID(),
},
},
Expects: []p2ptest.Expect{
{
Code: 1,
Msg: &OfferedHashesMsg{
Stream: stream,
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: make([]byte, HashSize),
From: 1,
To: 0,
},
Peer: node.ID(),
},
},
})
if err != nil {
t.Fatal(err)
}
}
}
//TestHasPriceImplementation is to check that the Registry has a
//`Price` interface implementation
func TestHasPriceImplementation(t *testing.T) {
_, r, _, teardown, err := newStreamerTester(&RegistryOptions{
Syncing: SyncingDisabled,
})
if err != nil {
t.Fatal(err)
}
defer teardown()
if r.prices == nil {
t.Fatal("No prices implementation available for the stream protocol")
}
pricesInstance, ok := r.prices.(*StreamerPrices)
if !ok {
t.Fatal("`Registry` does not have the expected Prices instance")
}
price := pricesInstance.Price(&ChunkDeliveryMsgRetrieval{})
if price == nil || price.Value == 0 || price.Value != pricesInstance.getChunkDeliveryMsgRetrievalPrice() {
t.Fatal("No prices set for chunk delivery msg")
}
price = pricesInstance.Price(&RetrieveRequestMsg{})
if price == nil || price.Value == 0 || price.Value != pricesInstance.getRetrieveRequestMsgPrice() {
t.Fatal("No prices set for chunk delivery msg")
}
}
// TestGetServerSubscriptions is a unit test for the api.GetPeerServerSubscriptions() function
func TestGetServerSubscriptions(t *testing.T) {
// create an amount of dummy peers
testPeerCount := 8
// every peer will have this amount of dummy servers
testServerCount := 4
// the peerMap which will store this data for the registry
peerMap := make(map[enode.ID]*Peer)
// create the registry
r := &Registry{}
api := NewAPI(r)
// call once, at this point should be empty
regs := api.GetPeerServerSubscriptions()
if len(regs) != 0 {
t.Fatal("Expected subscription count to be 0, but it is not")
}
// now create a number of dummy servers for each node
for i := 0; i < testPeerCount; i++ {
addr := network.RandomAddr()
id := addr.ID()
p := &Peer{}
p.servers = make(map[Stream]*server)
for k := 0; k < testServerCount; k++ {
s := Stream{
Name: strconv.Itoa(k),
Key: "",
Live: false,
}
p.servers[s] = &server{}
}
peerMap[id] = p
}
r.peers = peerMap
// call the subscriptions again
regs = api.GetPeerServerSubscriptions()
// count how many (fake) subscriptions there are
cnt := 0
for _, reg := range regs {
for range reg {
cnt++
}
}
// check expected value
expectedCount := testPeerCount * testServerCount
if cnt != expectedCount {
t.Fatalf("Expected %d subscriptions, but got %d", expectedCount, cnt)
}
}
/*
TestGetServerSubscriptionsRPC sets up a simulation network of `nodeCount` nodes,
starts the simulation, waits for SyncUpdateDelay in order to kick off
stream registration, then tests that there are subscriptions.
*/
func TestGetServerSubscriptionsRPC(t *testing.T) {
if testutil.RaceEnabled && os.Getenv("TRAVIS") == "true" {
t.Skip("flaky with -race on Travis")
// Note: related ticket https://github.com/ethersphere/go-ethereum/issues/1234
}
// arbitrarily set to 4
nodeCount := 4
// set the syncUpdateDelay for sync registrations to start
syncUpdateDelay := 200 * time.Millisecond
// run with more nodes if `longrunning` flag is set
if *longrunning {
nodeCount = 64
syncUpdateDelay = 10 * time.Second
}
// holds the msg code for SubscribeMsg
var subscribeMsgCode uint64
var ok bool
var expectedMsgCount counter
// this channel signalizes that the expected amount of subscriptiosn is done
allSubscriptionsDone := make(chan struct{})
// after the test, we need to reset the subscriptionFunc to the default
defer func() { subscriptionFunc = doRequestSubscription }()
// we use this subscriptionFunc for this test: just increases count and calls the actual subscription
subscriptionFunc = func(r *Registry, id enode.ID, bin uint8) error {
// syncing starts after syncUpdateDelay and loops after that Duration; we only want to count at the first iteration
// in the first iteration, subs will be empty (no existing subscriptions), thus we can use this check
// this avoids flakyness
expectedMsgCount.inc()
doRequestSubscription(r, id, bin)
return nil
}
// create a standard sim
sim := simulation.New(map[string]simulation.ServiceFunc{
"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
addr, netStore, delivery, clean, err := newNetStoreAndDeliveryWithRequestFunc(ctx, bucket, dummyRequestFromPeers)
if err != nil {
return nil, nil, err
}
// configure so that sync registrations actually happen
r := NewRegistry(addr.ID(), delivery, netStore, state.NewInmemoryStore(), &RegistryOptions{
Syncing: SyncingAutoSubscribe, //enable sync registrations
SyncUpdateDelay: syncUpdateDelay,
}, nil)
// get the SubscribeMsg code
subscribeMsgCode, ok = r.GetSpec().GetCode(SubscribeMsg{})
if !ok {
t.Fatal("Message code for SubscribeMsg not found")
}
cleanup = func() {
r.Close()
clean()
}
return r, cleanup, nil
},
})
defer sim.Close()
ctx, cancelSimRun := context.WithTimeout(context.Background(), 3*time.Minute)
defer cancelSimRun()
// setup the filter for SubscribeMsg
msgs := sim.PeerEvents(
context.Background(),
sim.UpNodeIDs(),
simulation.NewPeerEventsFilter().ReceivedMessages().Protocol("stream").MsgCode(subscribeMsgCode),
)
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
defer cancel()
filename := fmt.Sprintf("testing/snapshot_%d.json", nodeCount)
if err := sim.UploadSnapshot(ctx, filename); err != nil {
t.Fatal(err)
}
// strategy: listen to all SubscribeMsg events; after every event we wait
// if after `waitDuration` no more messages are being received, we assume the
// subscription phase has terminated!
// the loop in this go routine will either wait for new message events
// or times out after 1 second, which signals that we are not receiving
// any new subscriptions any more
go func() {
//for long running sims, waiting 1 sec will not be enough
waitDuration := 1 * time.Second
if *longrunning {
waitDuration = 3 * time.Second
}
for {
select {
case <-ctx.Done():
return
case m := <-msgs: // just reset the loop
if m.Error != nil {
log.Error("stream message", "err", m.Error)
continue
}
log.Trace("stream message", "node", m.NodeID, "peer", m.PeerID)
case <-time.After(waitDuration):
// one second passed, don't assume more subscriptions
allSubscriptionsDone <- struct{}{}
log.Info("All subscriptions received")
return
}
}
}()
//run the simulation
result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
log.Info("Simulation running")
nodes := sim.Net.Nodes
//wait until all subscriptions are done
select {
case <-allSubscriptionsDone:
case <-ctx.Done():
return errors.New("Context timed out")
}
log.Debug("Expected message count: ", "expectedMsgCount", expectedMsgCount.count())
//now iterate again, this time we call each node via RPC to get its subscriptions
realCount := 0
for _, node := range nodes {
//create rpc client
client, err := node.Client()
if err != nil {
return fmt.Errorf("create node 1 rpc client fail: %v", err)
}
//ask it for subscriptions
pstreams := make(map[string][]string)
err = client.Call(&pstreams, "stream_getPeerServerSubscriptions")
if err != nil {
return fmt.Errorf("client call stream_getPeerSubscriptions: %v", err)
}
//length of the subscriptions can not be smaller than number of peers
log.Debug("node subscriptions", "node", node.String())
for p, ps := range pstreams {
log.Debug("... with", "peer", p)
for _, s := range ps {
log.Debug(".......", "stream", s)
// each node also has subscriptions to RETRIEVE_REQUEST streams,
// we need to ignore those, we are only counting SYNC streams
if !strings.HasPrefix(s, "RETRIEVE_REQUEST") {
realCount++
}
}
}
log.Debug("All node streams counted", "realCount", realCount)
}
emc := expectedMsgCount.count()
// after a subscription request, internally a live AND a history stream will be subscribed,
// thus the real count should be half of the actual request subscriptions sent
if realCount/2 != emc {
return fmt.Errorf("Real subscriptions and expected amount don't match; real: %d, expected: %d", realCount/2, emc)
}
return nil
})
if result.Error != nil {
t.Fatal(result.Error)
}
}
// counter is used to concurrently increment
// and read an integer value.
type counter struct {
v int
mu sync.RWMutex
}
// Increment the counter.
func (c *counter) inc() {
c.mu.Lock()
defer c.mu.Unlock()
c.v++
}
// Read the counter value.
func (c *counter) count() int {
c.mu.RLock()
defer c.mu.RUnlock()
return c.v
}