Official Go implementation of the Ethereum protocol
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go-ethereum/swarm/network/stream/testing/testing.go

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7.9 KiB

// 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)
}