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package p2p
import (
"bytes"
"io"
"net"
"sync"
"testing"
"time"
)
func startTestServer(t *testing.T, pf peerFunc) *Server {
server := &Server{
Identity: &peerId{},
MaxPeers: 10,
ListenAddr: "127.0.0.1:0",
newPeerFunc: pf,
}
if err := server.Start(); err != nil {
t.Fatalf("Could not start server: %v", err)
}
return server
}
func TestServerListen(t *testing.T) {
defer testlog(t).detach()
// start the test server
connected := make(chan *Peer)
srv := startTestServer(t, func(srv *Server, conn net.Conn, dialAddr *peerAddr) *Peer {
if conn == nil {
t.Error("peer func called with nil conn")
}
if dialAddr != nil {
t.Error("peer func called with non-nil dialAddr")
}
peer := newPeer(conn, nil, dialAddr)
connected <- peer
return peer
})
defer close(connected)
defer srv.Stop()
// dial the test server
conn, err := net.DialTimeout("tcp", srv.ListenAddr, 5*time.Second)
if err != nil {
t.Fatalf("could not dial: %v", err)
}
defer conn.Close()
select {
case peer := <-connected:
if peer.conn.LocalAddr().String() != conn.RemoteAddr().String() {
t.Errorf("peer started with wrong conn: got %v, want %v",
peer.conn.LocalAddr(), conn.RemoteAddr())
}
case <-time.After(1 * time.Second):
t.Error("server did not accept within one second")
}
}
func TestServerDial(t *testing.T) {
defer testlog(t).detach()
// run a fake TCP server to handle the connection.
listener, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("could not setup listener: %v")
}
defer listener.Close()
accepted := make(chan net.Conn)
go func() {
conn, err := listener.Accept()
if err != nil {
t.Error("acccept error:", err)
}
conn.Close()
accepted <- conn
}()
// start the test server
connected := make(chan *Peer)
srv := startTestServer(t, func(srv *Server, conn net.Conn, dialAddr *peerAddr) *Peer {
if conn == nil {
t.Error("peer func called with nil conn")
}
peer := newPeer(conn, nil, dialAddr)
connected <- peer
return peer
})
defer close(connected)
defer srv.Stop()
// tell the server to connect.
connAddr := newPeerAddr(listener.Addr(), nil)
srv.peerConnect <- connAddr
select {
case conn := <-accepted:
select {
case peer := <-connected:
if peer.conn.RemoteAddr().String() != conn.LocalAddr().String() {
t.Errorf("peer started with wrong conn: got %v, want %v",
peer.conn.RemoteAddr(), conn.LocalAddr())
}
if peer.dialAddr != connAddr {
t.Errorf("peer started with wrong dialAddr: got %v, want %v",
peer.dialAddr, connAddr)
}
case <-time.After(1 * time.Second):
t.Error("server did not launch peer within one second")
}
case <-time.After(1 * time.Second):
t.Error("server did not connect within one second")
}
}
func TestServerBroadcast(t *testing.T) {
defer testlog(t).detach()
var connected sync.WaitGroup
srv := startTestServer(t, func(srv *Server, c net.Conn, dialAddr *peerAddr) *Peer {
peer := newPeer(c, []Protocol{discard}, dialAddr)
peer.startSubprotocols([]Cap{discard.cap()})
connected.Done()
return peer
})
defer srv.Stop()
// dial a bunch of conns
var conns = make([]net.Conn, 8)
connected.Add(len(conns))
deadline := time.Now().Add(3 * time.Second)
dialer := &net.Dialer{Deadline: deadline}
for i := range conns {
conn, err := dialer.Dial("tcp", srv.ListenAddr)
if err != nil {
t.Fatalf("conn %d: dial error: %v", i, err)
}
defer conn.Close()
conn.SetDeadline(deadline)
conns[i] = conn
}
connected.Wait()
// broadcast one message
srv.Broadcast("discard", 0, "foo")
goldbuf := new(bytes.Buffer)
writeMsg(goldbuf, NewMsg(16, "foo"))
golden := goldbuf.Bytes()
// check that the message has been written everywhere
for i, conn := range conns {
buf := make([]byte, len(golden))
if _, err := io.ReadFull(conn, buf); err != nil {
t.Errorf("conn %d: read error: %v", i, err)
} else if !bytes.Equal(buf, golden) {
t.Errorf("conn %d: msg mismatch\ngot: %x\nwant: %x", i, buf, golden)
}
}
}
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