// Copyright 2017 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"context"
"crypto/ecdsa"
"flag"
"fmt"
"io/ioutil"
"net"
"os"
"path"
"path/filepath"
"runtime"
"sync"
"syscall"
"testing"
"time"
"github.com/docker/docker/pkg/reexec"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/internal/cmdtest"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/swarm"
"github.com/ethereum/go-ethereum/swarm/api"
swarmhttp "github.com/ethereum/go-ethereum/swarm/api/http"
"github.com/ethereum/go-ethereum/swarm/testutil"
)
var loglevel = flag.Int("loglevel", 3, "verbosity of logs")
func init() {
// Run the app if we've been exec'd as "swarm-test" in runSwarm.
reexec.Register("swarm-test", func() {
if err := app.Run(os.Args); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
os.Exit(0)
})
}
func serverFunc(api *api.API) testutil.TestServer {
return swarmhttp.NewServer(api, "")
}
func TestMain(m *testing.M) {
// check if we have been reexec'd
if reexec.Init() {
return
}
os.Exit(m.Run())
}
func runSwarm(t *testing.T, args ...string) *cmdtest.TestCmd {
tt := cmdtest.NewTestCmd(t, nil)
// Boot "swarm". This actually runs the test binary but the TestMain
// function will prevent any tests from running.
tt.Run("swarm-test", args...)
return tt
}
type testCluster struct {
Nodes []*testNode
TmpDir string
}
// newTestCluster starts a test swarm cluster of the given size.
//
// A temporary directory is created and each node gets a data directory inside
// it.
//
// Each node listens on 127.0.0.1 with random ports for both the HTTP and p2p
// ports (assigned by first listening on 127.0.0.1:0 and then passing the ports
// as flags).
//
// When starting more than one node, they are connected together using the
// admin SetPeer RPC method.
func newTestCluster(t *testing.T, size int) *testCluster {
cluster := &testCluster{}
defer func() {
if t.Failed() {
cluster.Shutdown()
}
}()
tmpdir, err := ioutil.TempDir("", "swarm-test")
if err != nil {
t.Fatal(err)
}
cluster.TmpDir = tmpdir
// start the nodes
cluster.StartNewNodes(t, size)
if size == 1 {
return cluster
}
// connect the nodes together
for _, node := range cluster.Nodes {
if err := node.Client.Call(nil, "admin_addPeer", cluster.Nodes[0].Enode); err != nil {
t.Fatal(err)
}
}
// wait until all nodes have the correct number of peers
outer:
for _, node := range cluster.Nodes {
var peers []*p2p.PeerInfo
for start := time.Now(); time.Since(start) < time.Minute; time.Sleep(50 * time.Millisecond) {
if err := node.Client.Call(&peers, "admin_peers"); err != nil {
t.Fatal(err)
}
if len(peers) == len(cluster.Nodes)-1 {
continue outer
}
}
t.Fatalf("%s only has %d / %d peers", node.Name, len(peers), len(cluster.Nodes)-1)
}
return cluster
}
func (c *testCluster) Shutdown() {
for _, node := range c.Nodes {
node.Shutdown()
}
os.RemoveAll(c.TmpDir)
}
func (c *testCluster) Stop() {
for _, node := range c.Nodes {
node.Shutdown()
}
}
func (c *testCluster) StartNewNodes(t *testing.T, size int) {
c.Nodes = make([]*testNode, 0, size)
for i := 0; i < size; i++ {
dir := filepath.Join(c.TmpDir, fmt.Sprintf("swarm%02d", i))
if err := os.Mkdir(dir, 0700); err != nil {
t.Fatal(err)
}
node := newTestNode(t, dir)
node.Name = fmt.Sprintf("swarm%02d", i)
c.Nodes = append(c.Nodes, node)
}
}
func (c *testCluster) StartExistingNodes(t *testing.T, size int, bzzaccount string) {
c.Nodes = make([]*testNode, 0, size)
for i := 0; i < size; i++ {
dir := filepath.Join(c.TmpDir, fmt.Sprintf("swarm%02d", i))
node := existingTestNode(t, dir, bzzaccount)
node.Name = fmt.Sprintf("swarm%02d", i)
c.Nodes = append(c.Nodes, node)
}
}
func (c *testCluster) Cleanup() {
os.RemoveAll(c.TmpDir)
}
type testNode struct {
Name string
Addr string
URL string
Enode string
Dir string
IpcPath string
PrivateKey *ecdsa.PrivateKey
Client *rpc.Client
Cmd *cmdtest.TestCmd
}
const testPassphrase = "swarm-test-passphrase"
func getTestAccount(t *testing.T, dir string) (conf *node.Config, account accounts.Account) {
// create key
conf = &node.Config{
DataDir: dir,
IPCPath: "bzzd.ipc",
NoUSB: true,
}
n, err := node.New(conf)
if err != nil {
t.Fatal(err)
}
account, err = n.AccountManager().Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore).NewAccount(testPassphrase)
if err != nil {
t.Fatal(err)
}
// use a unique IPCPath when running tests on Windows
if runtime.GOOS == "windows" {
conf.IPCPath = fmt.Sprintf("bzzd-%s.ipc", account.Address.String())
}
return conf, account
}
func existingTestNode(t *testing.T, dir string, bzzaccount string) *testNode {
conf, _ := getTestAccount(t, dir)
node := &testNode{Dir: dir}
// use a unique IPCPath when running tests on Windows
if runtime.GOOS == "windows" {
conf.IPCPath = fmt.Sprintf("bzzd-%s.ipc", bzzaccount)
}
// assign ports
ports, err := getAvailableTCPPorts(2)
if err != nil {
t.Fatal(err)
}
p2pPort := ports[0]
httpPort := ports[1]
// start the node
node.Cmd = runSwarm(t,
"--port", p2pPort,
"--nat", "extip:127.0.0.1",
"--nodiscover",
"--datadir", dir,
"--ipcpath", conf.IPCPath,
"--ens-api", "",
"--bzzaccount", bzzaccount,
"--bzznetworkid", "321",
"--bzzport", httpPort,
"--verbosity", fmt.Sprint(*loglevel),
)
node.Cmd.InputLine(testPassphrase)
defer func() {
if t.Failed() {
node.Shutdown()
}
}()
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
// ensure that all ports have active listeners
// so that the next node will not get the same
// when calling getAvailableTCPPorts
err = waitTCPPorts(ctx, ports...)
if err != nil {
t.Fatal(err)
}
// wait for the node to start
for start := time.Now(); time.Since(start) < 10*time.Second; time.Sleep(50 * time.Millisecond) {
node.Client, err = rpc.Dial(conf.IPCEndpoint())
if err == nil {
break
}
}
if node.Client == nil {
t.Fatal(err)
}
// load info
var info swarm.Info
if err := node.Client.Call(&info, "bzz_info"); err != nil {
t.Fatal(err)
}
node.Addr = net.JoinHostPort("127.0.0.1", info.Port)
node.URL = "http://" + node.Addr
var nodeInfo p2p.NodeInfo
if err := node.Client.Call(&nodeInfo, "admin_nodeInfo"); err != nil {
t.Fatal(err)
}
node.Enode = nodeInfo.Enode
node.IpcPath = conf.IPCPath
return node
}
func newTestNode(t *testing.T, dir string) *testNode {
conf, account := getTestAccount(t, dir)
ks := keystore.NewKeyStore(path.Join(dir, "keystore"), 1<<18, 1)
pk := decryptStoreAccount(ks, account.Address.Hex(), []string{testPassphrase})
node := &testNode{Dir: dir, PrivateKey: pk}
// assign ports
ports, err := getAvailableTCPPorts(2)
if err != nil {
t.Fatal(err)
}
p2pPort := ports[0]
httpPort := ports[1]
// start the node
node.Cmd = runSwarm(t,
"--port", p2pPort,
"--nat", "extip:127.0.0.1",
"--nodiscover",
"--datadir", dir,
"--ipcpath", conf.IPCPath,
"--ens-api", "",
"--bzzaccount", account.Address.String(),
"--bzznetworkid", "321",
"--bzzport", httpPort,
"--verbosity", fmt.Sprint(*loglevel),
)
node.Cmd.InputLine(testPassphrase)
defer func() {
if t.Failed() {
node.Shutdown()
}
}()
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
// ensure that all ports have active listeners
// so that the next node will not get the same
// when calling getAvailableTCPPorts
err = waitTCPPorts(ctx, ports...)
if err != nil {
t.Fatal(err)
}
// wait for the node to start
for start := time.Now(); time.Since(start) < 10*time.Second; time.Sleep(50 * time.Millisecond) {
node.Client, err = rpc.Dial(conf.IPCEndpoint())
if err == nil {
break
}
}
if node.Client == nil {
t.Fatal(err)
}
// load info
var info swarm.Info
if err := node.Client.Call(&info, "bzz_info"); err != nil {
t.Fatal(err)
}
node.Addr = net.JoinHostPort("127.0.0.1", info.Port)
node.URL = "http://" + node.Addr
var nodeInfo p2p.NodeInfo
if err := node.Client.Call(&nodeInfo, "admin_nodeInfo"); err != nil {
t.Fatal(err)
}
node.Enode = nodeInfo.Enode
node.IpcPath = conf.IPCPath
return node
}
func (n *testNode) Shutdown() {
if n.Cmd != nil {
n.Cmd.Kill()
}
}
// getAvailableTCPPorts returns a set of ports that
// nothing is listening on at the time.
//
// Function assignTCPPort cannot be called in sequence
// and guardantee that the same port will be returned in
// different calls as the listener is closed within the function,
// not after all listeners are started and selected unique
// available ports.
func getAvailableTCPPorts(count int) (ports []string, err error) {
for i := 0; i < count; i++ {
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
return nil, err
}
// defer close in the loop to be sure the same port will not
// be selected in the next iteration
defer l.Close()
_, port, err := net.SplitHostPort(l.Addr().String())
if err != nil {
return nil, err
}
ports = append(ports, port)
}
return ports, nil
}
// waitTCPPorts blocks until tcp connections can be
// established on all provided ports. It runs all
// ports dialers in parallel, and returns the first
// encountered error.
// See waitTCPPort also.
func waitTCPPorts(ctx context.Context, ports ...string) error {
var err error
// mu locks err variable that is assigned in
// other goroutines
var mu sync.Mutex
// cancel is canceling all goroutines
// when the firs error is returned
// to prevent unnecessary waiting
ctx, cancel := context.WithCancel(ctx)
defer cancel()
var wg sync.WaitGroup
for _, port := range ports {
wg.Add(1)
go func(port string) {
defer wg.Done()
e := waitTCPPort(ctx, port)
mu.Lock()
defer mu.Unlock()
if e != nil && err == nil {
err = e
cancel()
}
}(port)
}
wg.Wait()
return err
}
// waitTCPPort blocks until tcp connection can be established
// ona provided port. It has a 3 minute timeout as maximum,
// to prevent long waiting, but it can be shortened with
// a provided context instance. Dialer has a 10 second timeout
// in every iteration, and connection refused error will be
// retried in 100 milliseconds periods.
func waitTCPPort(ctx context.Context, port string) error {
ctx, cancel := context.WithTimeout(ctx, 3*time.Minute)
defer cancel()
for {
c, err := (&net.Dialer{Timeout: 10 * time.Second}).DialContext(ctx, "tcp", "127.0.0.1:"+port)
if err != nil {
if operr, ok := err.(*net.OpError); ok {
if syserr, ok := operr.Err.(*os.SyscallError); ok && syserr.Err == syscall.ECONNREFUSED {
time.Sleep(100 * time.Millisecond)
continue
}
}
return err
}
return c.Close()
}
}
