package p2p
import (
"bytes"
"fmt"
"io"
"net"
"testing"
"time"
)
type TestNetworkConnection struct {
in chan []byte
current []byte
Out [][]byte
addr net.Addr
}
func NewTestNetworkConnection(addr net.Addr) *TestNetworkConnection {
return &TestNetworkConnection{
in: make(chan []byte),
current: []byte{},
Out: [][]byte{},
addr: addr,
}
}
func (self *TestNetworkConnection) In(latency time.Duration, packets ...[]byte) {
time.Sleep(latency)
for _, s := range packets {
self.in <- s
}
}
func (self *TestNetworkConnection) Read(buff []byte) (n int, err error) {
if len(self.current) == 0 {
select {
case self.current = <-self.in:
default:
return 0, io.EOF
}
}
length := len(self.current)
if length > len(buff) {
copy(buff[:], self.current[:len(buff)])
self.current = self.current[len(buff):]
return len(buff), nil
} else {
copy(buff[:length], self.current[:])
self.current = []byte{}
return length, io.EOF
}
}
func (self *TestNetworkConnection) Write(buff []byte) (n int, err error) {
self.Out = append(self.Out, buff)
fmt.Printf("net write %v\n%v\n", len(self.Out), buff)
return len(buff), nil
}
func (self *TestNetworkConnection) Close() (err error) {
return
}
func (self *TestNetworkConnection) LocalAddr() (addr net.Addr) {
return
}
func (self *TestNetworkConnection) RemoteAddr() (addr net.Addr) {
return self.addr
}
func (self *TestNetworkConnection) SetDeadline(t time.Time) (err error) {
return
}
func (self *TestNetworkConnection) SetReadDeadline(t time.Time) (err error) {
return
}
func (self *TestNetworkConnection) SetWriteDeadline(t time.Time) (err error) {
return
}
func setupConnection() (*Connection, *TestNetworkConnection) {
addr := &TestAddr{"test:30303"}
net := NewTestNetworkConnection(addr)
conn := NewConnection(net, NewPeerErrorChannel())
conn.Open()
return conn, net
}
func TestReadingNilPacket(t *testing.T) {
conn, net := setupConnection()
go net.In(0, []byte{})
// time.Sleep(10 * time.Millisecond)
select {
case packet := <-conn.Read():
t.Errorf("read %v", packet)
case err := <-conn.Error():
t.Errorf("incorrect error %v", err)
default:
}
conn.Close()
}
func TestReadingShortPacket(t *testing.T) {
conn, net := setupConnection()
go net.In(0, []byte{0})
select {
case packet := <-conn.Read():
t.Errorf("read %v", packet)
case err := <-conn.Error():
if err.Code != PacketTooShort {
t.Errorf("incorrect error %v, expected %v", err.Code, PacketTooShort)
}
}
conn.Close()
}
func TestReadingInvalidPacket(t *testing.T) {
conn, net := setupConnection()
go net.In(0, []byte{1, 0, 0, 0, 0, 0, 0, 0})
select {
case packet := <-conn.Read():
t.Errorf("read %v", packet)
case err := <-conn.Error():
if err.Code != MagicTokenMismatch {
t.Errorf("incorrect error %v, expected %v", err.Code, MagicTokenMismatch)
}
}
conn.Close()
}
func TestReadingInvalidPayload(t *testing.T) {
conn, net := setupConnection()
go net.In(0, []byte{34, 64, 8, 145, 0, 0, 0, 2, 0})
select {
case packet := <-conn.Read():
t.Errorf("read %v", packet)
case err := <-conn.Error():
if err.Code != PayloadTooShort {
t.Errorf("incorrect error %v, expected %v", err.Code, PayloadTooShort)
}
}
conn.Close()
}
func TestReadingEmptyPayload(t *testing.T) {
conn, net := setupConnection()
go net.In(0, []byte{34, 64, 8, 145, 0, 0, 0, 0})
time.Sleep(10 * time.Millisecond)
select {
case packet := <-conn.Read():
t.Errorf("read %v", packet)
default:
}
select {
case err := <-conn.Error():
code := err.Code
if code != EmptyPayload {
t.Errorf("incorrect error, expected EmptyPayload, got %v", code)
}
default:
t.Errorf("no error, expected EmptyPayload")
}
conn.Close()
}
func TestReadingCompletePacket(t *testing.T) {
conn, net := setupConnection()
go net.In(0, []byte{34, 64, 8, 145, 0, 0, 0, 1, 1})
time.Sleep(10 * time.Millisecond)
select {
case packet := <-conn.Read():
if bytes.Compare(packet, []byte{1}) != 0 {
t.Errorf("incorrect payload read")
}
case err := <-conn.Error():
t.Errorf("incorrect error %v", err)
default:
t.Errorf("nothing read")
}
conn.Close()
}
func TestReadingTwoCompletePackets(t *testing.T) {
conn, net := setupConnection()
go net.In(0, []byte{34, 64, 8, 145, 0, 0, 0, 1, 0, 34, 64, 8, 145, 0, 0, 0, 1, 1})
for i := 0; i < 2; i++ {
time.Sleep(10 * time.Millisecond)
select {
case packet := <-conn.Read():
if bytes.Compare(packet, []byte{byte(i)}) != 0 {
t.Errorf("incorrect payload read")
}
case err := <-conn.Error():
t.Errorf("incorrect error %v", err)
default:
t.Errorf("nothing read")
}
}
conn.Close()
}
func TestWriting(t *testing.T) {
conn, net := setupConnection()
conn.Write() <- []byte{0}
time.Sleep(10 * time.Millisecond)
if len(net.Out) == 0 {
t.Errorf("no output")
} else {
out := net.Out[0]
if bytes.Compare(out, []byte{34, 64, 8, 145, 0, 0, 0, 1, 0}) != 0 {
t.Errorf("incorrect packet %v", out)
}
}
conn.Close()
}
// hello packet with client id ABC: 0x22 40 08 91 00 00 00 08 84 00 00 00 43414243
