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Merge pull request #562 from AwesomePatrol/dev/patrol/bench01

#60 Add simple tests and benchmark
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Arceliar 2019-10-05 12:20:27 -05:00 committed by GitHub
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src/yggdrasil/core_test.go Normal file
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package yggdrasil
import (
"bytes"
"math/rand"
"os"
"testing"
"time"
"github.com/gologme/log"
"github.com/yggdrasil-network/yggdrasil-go/src/config"
)
// GenerateConfig produces default configuration with suitable modifications for tests.
func GenerateConfig() *config.NodeConfig {
cfg := config.GenerateConfig()
cfg.AdminListen = "none"
cfg.Listen = []string{"tcp://127.0.0.1:0"}
cfg.IfName = "none"
return cfg
}
// GetLoggerWithPrefix creates a new logger instance wih prefix.
// If verbose is set to true, three log levels are enabled: "info", "warn", "error".
func GetLoggerWithPrefix(prefix string, verbose bool) *log.Logger {
l := log.New(os.Stderr, prefix, log.Flags())
if !verbose {
return l
}
l.EnableLevel("info")
l.EnableLevel("warn")
l.EnableLevel("error")
return l
}
// CreateAndConnectTwo creates two nodes. nodeB connects to nodeA.
// Verbosity flag is passed to logger.
func CreateAndConnectTwo(t testing.TB, verbose bool) (nodeA *Core, nodeB *Core) {
nodeA = new(Core)
_, err := nodeA.Start(GenerateConfig(), GetLoggerWithPrefix("A: ", verbose))
if err != nil {
t.Fatal(err)
}
nodeB = new(Core)
_, err = nodeB.Start(GenerateConfig(), GetLoggerWithPrefix("B: ", verbose))
if err != nil {
t.Fatal(err)
}
err = nodeB.AddPeer("tcp://"+nodeA.link.tcp.getAddr().String(), "")
if err != nil {
t.Fatal(err)
}
if l := len(nodeA.GetPeers()); l != 1 {
t.Fatal("unexpected number of peers", l)
}
if l := len(nodeB.GetPeers()); l != 1 {
t.Fatal("unexpected number of peers", l)
}
return nodeA, nodeB
}
// WaitConnected blocks until either nodes negotiated DHT or 5 seconds passed.
func WaitConnected(nodeA, nodeB *Core) bool {
// It may take up to 3 seconds, but let's wait 5.
for i := 0; i < 50; i++ {
time.Sleep(100 * time.Millisecond)
if len(nodeA.GetSwitchPeers()) > 0 && len(nodeB.GetSwitchPeers()) > 0 {
return true
}
}
return false
}
// CreateEchoListener creates a routine listening on nodeA. It expects repeats messages of length bufLen.
// It returns a channel used to synchronize the routine with caller.
func CreateEchoListener(t testing.TB, nodeA *Core, bufLen int, repeats int) chan struct{} {
// Listen. Doing it here guarantees that there will be something to try to connect when it returns.
listener, err := nodeA.ConnListen()
if err != nil {
t.Fatal(err)
}
// Start routine
done := make(chan struct{})
go func() {
defer listener.Close()
conn, err := listener.Accept()
if err != nil {
t.Error(err)
return
}
defer conn.Close()
buf := make([]byte, bufLen)
for i := 0; i < repeats; i++ {
n, err := conn.Read(buf)
if err != nil {
t.Error(err)
return
}
if n != bufLen {
t.Error("missing data")
return
}
_, err = conn.Write(buf)
if err != nil {
t.Error(err)
}
}
done <- struct{}{}
}()
return done
}
// TestCore_Start_Connect checks if two nodes can connect together.
func TestCore_Start_Connect(t *testing.T) {
CreateAndConnectTwo(t, true)
}
// TestCore_Start_Transfer checks that messages can be passed between nodes (in both directions).
func TestCore_Start_Transfer(t *testing.T) {
nodeA, nodeB := CreateAndConnectTwo(t, true)
msgLen := 1500
done := CreateEchoListener(t, nodeA, msgLen, 1)
if !WaitConnected(nodeA, nodeB) {
t.Fatal("nodes did not connect")
}
// Dial
dialer, err := nodeB.ConnDialer()
if err != nil {
t.Fatal(err)
}
conn, err := dialer.Dial("nodeid", nodeA.NodeID().String())
if err != nil {
t.Fatal(err)
}
defer conn.Close()
msg := make([]byte, msgLen)
rand.Read(msg)
conn.Write(msg)
if err != nil {
t.Fatal(err)
}
buf := make([]byte, msgLen)
_, err = conn.Read(buf)
if err != nil {
t.Fatal(err)
}
if bytes.Compare(msg, buf) != 0 {
t.Fatal("expected echo")
}
<-done
}
// BenchmarkCore_Start_Transfer estimates the possible transfer between nodes (in MB/s).
func BenchmarkCore_Start_Transfer(b *testing.B) {
nodeA, nodeB := CreateAndConnectTwo(b, false)
msgLen := 1500 // typical MTU
done := CreateEchoListener(b, nodeA, msgLen, b.N)
if !WaitConnected(nodeA, nodeB) {
b.Fatal("nodes did not connect")
}
// Dial
dialer, err := nodeB.ConnDialer()
if err != nil {
b.Fatal(err)
}
conn, err := dialer.Dial("nodeid", nodeA.NodeID().String())
if err != nil {
b.Fatal(err)
}
defer conn.Close()
msg := make([]byte, msgLen)
rand.Read(msg)
buf := make([]byte, msgLen)
b.SetBytes(int64(b.N * msgLen))
b.ResetTimer()
for i := 0; i < b.N; i++ {
conn.Write(msg)
if err != nil {
b.Fatal(err)
}
_, err = conn.Read(buf)
if err != nil {
b.Fatal(err)
}
}
<-done
}