ceremonyclient/go-libp2p/p2p/discovery/mdns/mdns_test.go

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2023-08-21 03:50:38 +00:00
package mdns
import (
"sync"
"testing"
"time"
"github.com/libp2p/go-libp2p"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func setupMDNS(t *testing.T, notifee Notifee) peer.ID {
t.Helper()
host, err := libp2p.New(libp2p.ListenAddrStrings("/ip4/127.0.0.1/tcp/0"))
require.NoError(t, err)
s := NewMdnsService(host, "", notifee)
require.NoError(t, s.Start())
t.Cleanup(func() {
host.Close()
s.Close()
})
return host.ID()
}
type notif struct {
mutex sync.Mutex
infos []peer.AddrInfo
}
var _ Notifee = &notif{}
func (n *notif) HandlePeerFound(info peer.AddrInfo) {
n.mutex.Lock()
n.infos = append(n.infos, info)
n.mutex.Unlock()
}
func (n *notif) GetPeers() []peer.AddrInfo {
n.mutex.Lock()
defer n.mutex.Unlock()
infos := make([]peer.AddrInfo, 0, len(n.infos))
infos = append(infos, n.infos...)
return infos
}
func TestOtherDiscovery(t *testing.T) {
const n = 4
notifs := make([]*notif, n)
hostIDs := make([]peer.ID, n)
for i := 0; i < n; i++ {
notif := &notif{}
notifs[i] = notif
hostIDs[i] = setupMDNS(t, notif)
}
containsAllHostIDs := func(ids []peer.ID, currentHostID peer.ID) bool {
for _, id := range hostIDs {
var found bool
if currentHostID == id {
continue
}
for _, i := range ids {
if id == i {
found = true
break
}
}
if !found {
return false
}
}
return true
}
assert.Eventuallyf(
t,
func() bool {
for i, notif := range notifs {
infos := notif.GetPeers()
ids := make([]peer.ID, 0, len(infos))
for _, info := range infos {
ids = append(ids, info.ID)
}
if !containsAllHostIDs(ids, hostIDs[i]) {
return false
}
}
return true
},
25*time.Second,
5*time.Millisecond,
"expected peers to find each other",
)
}