ceremonyclient/go-libp2p/p2p/net/swarm/swarm_net_test.go

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2023-08-21 03:50:38 +00:00
package swarm_test
import (
"context"
"fmt"
"io"
"testing"
"time"
"github.com/libp2p/go-libp2p/core/network"
. "github.com/libp2p/go-libp2p/p2p/net/swarm/testing"
"github.com/stretchr/testify/require"
)
// TestConnectednessCorrect starts a few networks, connects a few
// and tests Connectedness value is correct.
func TestConnectednessCorrect(t *testing.T) {
nets := make([]network.Network, 4)
for i := 0; i < 4; i++ {
nets[i] = GenSwarm(t)
}
// connect 0-1, 0-2, 0-3, 1-2, 2-3
dial := func(a, b network.Network) {
DivulgeAddresses(b, a)
if _, err := a.DialPeer(context.Background(), b.LocalPeer()); err != nil {
t.Fatalf("Failed to dial: %s", err)
}
}
dial(nets[0], nets[1])
dial(nets[0], nets[3])
dial(nets[1], nets[2])
dial(nets[3], nets[2])
// The notifications for new connections get sent out asynchronously.
// There is the potential for a race condition here, so we sleep to ensure
// that they have been received.
time.Sleep(time.Millisecond * 100)
// test those connected show up correctly
// test connected
expectConnectedness(t, nets[0], nets[1], network.Connected)
expectConnectedness(t, nets[0], nets[3], network.Connected)
expectConnectedness(t, nets[1], nets[2], network.Connected)
expectConnectedness(t, nets[3], nets[2], network.Connected)
// test not connected
expectConnectedness(t, nets[0], nets[2], network.NotConnected)
expectConnectedness(t, nets[1], nets[3], network.NotConnected)
require.Len(t, nets[0].Peers(), 2, "expected net 0 to have two peers")
require.Len(t, nets[2].Peers(), 2, "expected net 2 to have two peers")
require.NotZerof(t, nets[1].ConnsToPeer(nets[3].LocalPeer()), "net 1 should have no connections to net 3")
require.NoError(t, nets[2].ClosePeer(nets[1].LocalPeer()))
time.Sleep(time.Millisecond * 50)
expectConnectedness(t, nets[2], nets[1], network.NotConnected)
for _, n := range nets {
n.Close()
}
}
func expectConnectedness(t *testing.T, a, b network.Network, expected network.Connectedness) {
es := "%s is connected to %s, but Connectedness incorrect. %s %s %s"
atob := a.Connectedness(b.LocalPeer())
btoa := b.Connectedness(a.LocalPeer())
if atob != expected {
t.Errorf(es, a, b, printConns(a), printConns(b), atob)
}
// test symmetric case
if btoa != expected {
t.Errorf(es, b, a, printConns(b), printConns(a), btoa)
}
}
func printConns(n network.Network) string {
s := fmt.Sprintf("Connections in %s:\n", n)
for _, c := range n.Conns() {
s = s + fmt.Sprintf("- %s\n", c)
}
return s
}
func TestNetworkOpenStream(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
testString := "hello ipfs"
nets := make([]network.Network, 4)
for i := 0; i < 4; i++ {
nets[i] = GenSwarm(t)
}
dial := func(a, b network.Network) {
DivulgeAddresses(b, a)
if _, err := a.DialPeer(ctx, b.LocalPeer()); err != nil {
t.Fatalf("Failed to dial: %s", err)
}
}
dial(nets[0], nets[1])
dial(nets[0], nets[3])
dial(nets[1], nets[2])
done := make(chan bool)
nets[1].SetStreamHandler(func(s network.Stream) {
defer close(done)
defer s.Close()
buf, err := io.ReadAll(s)
if err != nil {
t.Error(err)
return
}
if string(buf) != testString {
t.Error("got wrong message")
}
})
s, err := nets[0].NewStream(ctx, nets[1].LocalPeer())
if err != nil {
t.Fatal(err)
}
var numStreams int
for _, conn := range nets[0].ConnsToPeer(nets[1].LocalPeer()) {
numStreams += conn.Stat().NumStreams
}
if numStreams != 1 {
t.Fatal("should only have one stream there")
}
n, err := s.Write([]byte(testString))
if err != nil {
t.Fatal(err)
} else if n != len(testString) {
t.Errorf("expected to write %d bytes, wrote %d", len(testString), n)
}
err = s.Close()
if err != nil {
t.Fatal(err)
}
select {
case <-done:
case <-time.After(time.Millisecond * 100):
t.Fatal("timed out waiting on stream")
}
_, err = nets[1].NewStream(ctx, nets[3].LocalPeer())
if err == nil {
t.Fatal("expected stream open 1->3 to fail")
}
}