ceremonyclient/go-libp2p/p2p/net/mock/mock_notif_test.go

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2023-08-21 03:50:38 +00:00
package mocknet
import (
"context"
"sync"
"testing"
"time"
"github.com/libp2p/go-libp2p/core/network"
"github.com/libp2p/go-libp2p/core/peer"
ma "github.com/multiformats/go-multiaddr"
"github.com/stretchr/testify/require"
)
func TestNotifications(t *testing.T) {
const swarmSize = 5
const timeout = 10 * time.Second
mn, err := FullMeshLinked(swarmSize)
if err != nil {
t.Fatal(err)
}
defer mn.Close()
// signup notifs
nets := mn.Nets()
notifiees := make(map[peer.ID]*netNotifiee, len(nets))
for _, pn := range nets {
defer pn.Close()
n := newNetNotifiee(t, swarmSize)
pn.Notify(n)
notifiees[pn.LocalPeer()] = n
}
// connect all but self
if err := mn.ConnectAllButSelf(); err != nil {
t.Fatal(err)
}
// test everyone got the correct connection opened calls
for _, s1 := range nets {
n := notifiees[s1.LocalPeer()]
notifs := make(map[peer.ID][]network.Conn)
for _, s2 := range nets {
if s2 == s1 {
continue
}
// this feels a little sketchy, but its probably okay
for len(s1.ConnsToPeer(s2.LocalPeer())) != len(notifs[s2.LocalPeer()]) {
select {
case c := <-n.connected:
nfp := notifs[c.RemotePeer()]
notifs[c.RemotePeer()] = append(nfp, c)
case <-time.After(timeout):
t.Fatal("timeout")
}
}
}
for p, cons := range notifs {
expect := s1.ConnsToPeer(p)
if len(expect) != len(cons) {
t.Fatal("got different number of connections")
}
for _, c := range cons {
var found bool
for _, c2 := range expect {
if c == c2 {
found = true
break
}
}
if !found {
t.Fatal("connection not found!")
}
}
}
}
acceptedStream := make(chan struct{}, 1000)
for _, s := range nets {
s.SetStreamHandler(func(s network.Stream) {
acceptedStream <- struct{}{}
s.Close()
})
}
// Make sure we've received at last one stream per conn.
for _, s := range nets {
conns := s.Conns()
for _, c := range conns {
st1, err := c.NewStream(context.Background())
if err != nil {
t.Error(err)
continue
}
t.Logf("%s %s <--%p--> %s %s", c.LocalPeer(), c.LocalMultiaddr(), st1, c.RemotePeer(), c.RemoteMultiaddr())
st1.Close()
}
}
// close conns
for _, s1 := range nets {
n1 := notifiees[s1.LocalPeer()]
for _, c1 := range s1.Conns() {
c2 := ConnComplement(c1)
n2 := notifiees[c2.LocalPeer()]
c1.Close()
var c3, c4 network.Conn
select {
case c3 = <-n1.disconnected:
case <-time.After(timeout):
t.Fatal("timeout")
}
if c1 != c3 {
t.Fatal("got incorrect conn", c1, c3)
}
select {
case c4 = <-n2.disconnected:
case <-time.After(timeout):
t.Fatal("timeout")
}
if c2 != c4 {
t.Fatal("got incorrect conn", c1, c2)
}
}
}
for _, n1 := range notifiees {
// Avoid holding this lock while waiting, otherwise we can deadlock.
streamStateCopy := map[network.Stream]chan struct{}{}
n1.streamState.Lock()
for str, ch := range n1.streamState.m {
streamStateCopy[str] = ch
}
n1.streamState.Unlock()
for str1, ch1 := range streamStateCopy {
<-ch1
str2 := StreamComplement(str1)
n2 := notifiees[str1.Conn().RemotePeer()]
// make sure the OpenedStream notification was processed first
var ch2 chan struct{}
require.Eventually(t, func() bool {
n2.streamState.Lock()
defer n2.streamState.Unlock()
ch, ok := n2.streamState.m[str2]
if ok {
ch2 = ch
}
return ok
}, time.Second, 10*time.Millisecond)
<-ch2
}
}
}
type netNotifiee struct {
t *testing.T
listen chan ma.Multiaddr
listenClose chan ma.Multiaddr
connected chan network.Conn
disconnected chan network.Conn
streamState struct {
sync.Mutex
m map[network.Stream]chan struct{}
}
}
func newNetNotifiee(t *testing.T, buffer int) *netNotifiee {
nn := &netNotifiee{
t: t,
listen: make(chan ma.Multiaddr, 1),
listenClose: make(chan ma.Multiaddr, 1),
connected: make(chan network.Conn, buffer*2),
disconnected: make(chan network.Conn, buffer*2),
}
nn.streamState.m = make(map[network.Stream]chan struct{})
return nn
}
func (nn *netNotifiee) Listen(n network.Network, a ma.Multiaddr) {
nn.listen <- a
}
func (nn *netNotifiee) ListenClose(n network.Network, a ma.Multiaddr) {
nn.listenClose <- a
}
func (nn *netNotifiee) Connected(n network.Network, v network.Conn) {
nn.connected <- v
}
func (nn *netNotifiee) Disconnected(n network.Network, v network.Conn) {
nn.disconnected <- v
}