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path: root/p2p/messenger_test.go
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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")
    }
}