initial commit of p2p package

p2p/messenger_test.go

@@ -0,0 +1,146 @@
+package p2p
+
+import (
+	// "fmt"
+	"bytes"
+	"github.com/ethereum/eth-go/ethutil"
+	"testing"
+	"time"
+)
+
+func setupMessenger(handlers Handlers) (*TestNetworkConnection, chan *PeerError, *Messenger) {
+	errchan := NewPeerErrorChannel()
+	addr := &TestAddr{"test:30303"}
+	net := NewTestNetworkConnection(addr)
+	conn := NewConnection(net, errchan)
+	mess := NewMessenger(nil, conn, errchan, handlers)
+	mess.Start()
+	return net, errchan, mess
+}
+
+type TestProtocol struct {
+	Msgs []*Msg
+}
+
+func (self *TestProtocol) Start() {
+}
+
+func (self *TestProtocol) Stop() {
+}
+
+func (self *TestProtocol) Offset() MsgCode {
+	return MsgCode(5)
+}
+
+func (self *TestProtocol) HandleIn(msg *Msg, response chan *Msg) {
+	self.Msgs = append(self.Msgs, msg)
+	close(response)
+}
+
+func (self *TestProtocol) HandleOut(msg *Msg) bool {
+	if msg.Code() > 3 {
+		return false
+	} else {
+		return true
+	}
+}
+
+func (self *TestProtocol) Name() string {
+	return "a"
+}
+
+func Packet(offset MsgCode, code MsgCode, params ...interface{}) []byte {
+	msg, _ := NewMsg(code, params...)
+	encoded := msg.Encode(offset)
+	packet := []byte{34, 64, 8, 145}
+	packet = append(packet, ethutil.NumberToBytes(uint32(len(encoded)), 32)...)
+	return append(packet, encoded...)
+}
+
+func TestRead(t *testing.T) {
+	handlers := make(Handlers)
+	testProtocol := &TestProtocol{Msgs: []*Msg{}}
+	handlers["a"] = func(p *Peer) Protocol { return testProtocol }
+	net, _, mess := setupMessenger(handlers)
+	mess.AddProtocols([]string{"a"})
+	defer mess.Stop()
+	wait := 1 * time.Millisecond
+	packet := Packet(16, 1, uint32(1), "000")
+	go net.In(0, packet)
+	time.Sleep(wait)
+	if len(testProtocol.Msgs) != 1 {
+		t.Errorf("msg not relayed to correct protocol")
+	} else {
+		if testProtocol.Msgs[0].Code() != 1 {
+			t.Errorf("incorrect msg code relayed to protocol")
+		}
+	}
+}
+
+func TestWrite(t *testing.T) {
+	handlers := make(Handlers)
+	testProtocol := &TestProtocol{Msgs: []*Msg{}}
+	handlers["a"] = func(p *Peer) Protocol { return testProtocol }
+	net, _, mess := setupMessenger(handlers)
+	mess.AddProtocols([]string{"a"})
+	defer mess.Stop()
+	wait := 1 * time.Millisecond
+	msg, _ := NewMsg(3, uint32(1), "000")
+	err := mess.Write("b", msg)
+	if err == nil {
+		t.Errorf("expect error for unknown protocol")
+	}
+	err = mess.Write("a", msg)
+	if err != nil {
+		t.Errorf("expect no error for known protocol: %v", err)
+	} else {
+		time.Sleep(wait)
+		if len(net.Out) != 1 {
+			t.Errorf("msg not written")
+		} else {
+			out := net.Out[0]
+			packet := Packet(16, 3, uint32(1), "000")
+			if bytes.Compare(out, packet) != 0 {
+				t.Errorf("incorrect packet %v", out)
+			}
+		}
+	}
+}
+
+func TestPulse(t *testing.T) {
+	net, _, mess := setupMessenger(make(Handlers))
+	defer mess.Stop()
+	ping := false
+	timeout := false
+	pingTimeout := 10 * time.Millisecond
+	gracePeriod := 200 * time.Millisecond
+	go mess.PingPong(pingTimeout, gracePeriod, func() { ping = true }, func() { timeout = true })
+	net.In(0, Packet(0, 1))
+	if ping {
+		t.Errorf("ping sent too early")
+	}
+	time.Sleep(pingTimeout + 100*time.Millisecond)
+	if !ping {
+		t.Errorf("no ping sent after timeout")
+	}
+	if timeout {
+		t.Errorf("timeout too early")
+	}
+	ping = false
+	net.In(0, Packet(0, 1))
+	time.Sleep(pingTimeout + 100*time.Millisecond)
+	if !ping {
+		t.Errorf("no ping sent after timeout")
+	}
+	if timeout {
+		t.Errorf("timeout too early")
+	}
+	ping = false
+	time.Sleep(gracePeriod)
+	if ping {
+		t.Errorf("ping called twice")
+	}
+	if !timeout {
+		t.Errorf("no timeout after grace period")
+	}
+}