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// Copyright 2019 Andy Pan. All rights reserved.
// Copyright 2017 Joshua J Baker. All rights reserved.
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package gnet
import (
"bufio"
"fmt"
"io"
"math/rand"
"net"
"os"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/panjf2000/gnet/pool"
)
func TestServe(t *testing.T) {
// start a server
// connect 10 clients
// each client will pipe random data for 1-3 seconds.
// the writes to the server will be random sizes. 0KB - 1MB.
// the server will echo back the data.
// waits for graceful connection closing.
t.Run("poll", func(t *testing.T) {
t.Run("tcp", func(t *testing.T) {
t.Run("1-loop", func(t *testing.T) {
testServe("tcp", ":9991", false, false, false, 10)
})
t.Run("N-loop", func(t *testing.T) {
testServe("tcp", ":9992", false, true, false, 10)
})
})
t.Run("tcp-async", func(t *testing.T) {
t.Run("1-loop", func(t *testing.T) {
testServe("tcp", ":9991", false, false, true, 10)
})
t.Run("N-loop", func(t *testing.T) {
testServe("tcp", ":9992", false, true, true, 10)
})
})
t.Run("udp", func(t *testing.T) {
t.Run("1-loop", func(t *testing.T) {
testServe("udp", ":9991", false, false, false, 10)
})
t.Run("N-loop", func(t *testing.T) {
testServe("udp", ":9992", false, true, false, 10)
})
})
//t.Run("unix", func(t *testing.T) {
// t.Run("1-loop", func(t *testing.T) {
// testServe("unix", "socket9991", false, false, false, 10)
// })
// t.Run("N-loop", func(t *testing.T) {
// testServe("unix", "socket9992", false, true, false, 10)
// })
//})
})
t.Run("poll-reuseport", func(t *testing.T) {
t.Run("tcp", func(t *testing.T) {
t.Run("1-loop", func(t *testing.T) {
testServe("tcp", ":9991", true, false, false, 10)
})
t.Run("N-loop", func(t *testing.T) {
testServe("tcp", ":9992", true, true, false, 10)
})
})
t.Run("udp", func(t *testing.T) {
t.Run("1-loop", func(t *testing.T) {
testServe("udp", ":9991", true, false, false, 10)
})
t.Run("N-loop", func(t *testing.T) {
testServe("udp", ":9992", true, true, false, 10)
})
})
//t.Run("unix", func(t *testing.T) {
// t.Run("1-loop", func(t *testing.T) {
// testServe("unix", "socket9991", true, false, false, 10)
// })
// t.Run("N-loop", func(t *testing.T) {
// testServe("unix", "socket9992", true, true, false, 10)
// })
//})
})
}
type testServer struct {
*EventServer
network string
addr string
multicore bool
async bool
nclients int
started int32
connected int32
clientActive int32
disconnected int32
bytesPool *pool.BytesPool
workerPool *pool.WorkerPool
bytesList [][]byte
}
func (s *testServer) OnOpened(c Conn) (out []byte, action Action) {
c.SetContext(c)
atomic.AddInt32(&s.connected, 1)
out = []byte("sweetness\r\n")
if c.LocalAddr() == nil {
panic("nil local addr")
}
if c.RemoteAddr() == nil {
panic("nil local addr")
}
return
}
func (s *testServer) OnClosed(c Conn, err error) (action Action) {
if c.Context() != c {
panic("invalid context")
}
atomic.AddInt32(&s.disconnected, 1)
if atomic.LoadInt32(&s.connected) == atomic.LoadInt32(&s.disconnected) &&
atomic.LoadInt32(&s.disconnected) == int32(s.nclients) {
action = Shutdown
for i := range s.bytesList {
s.bytesPool.Put(s.bytesList[i])
}
s.workerPool.Release()
}
return
}
func (s *testServer) React(c Conn) (out []byte, action Action) {
if s.async {
bufLen := c.BufferLength()
buf := s.bytesPool.GetLen(bufLen)
data := c.Read()
copy(buf, data)
s.bytesList = append(s.bytesList, buf)
c.ResetBuffer()
_ = s.workerPool.Submit(
func() {
c.AsyncWrite(buf)
})
return
} else if s.multicore {
readSize := 1024 * 1024
if s.network == "udp" {
readSize = 64
}
n, data := c.ReadN(readSize)
if n == readSize {
out = data
return
}
return
}
out = c.Read()
c.ResetBuffer()
return
}
func (s *testServer) Tick() (delay time.Duration, action Action) {
if atomic.LoadInt32(&s.started) == 0 {
for i := 0; i < s.nclients; i++ {
atomic.AddInt32(&s.clientActive, 1)
go func() {
startClient(s.network, s.addr, s.multicore, s.async)
atomic.AddInt32(&s.clientActive, -1)
}()
}
atomic.StoreInt32(&s.started, 1)
}
if s.network == "udp" && atomic.LoadInt32(&s.clientActive) == 0 {
action = Shutdown
return
}
delay = time.Second / 5
return
}
func testServe(network, addr string, reuseport, multicore, async bool, nclients int) {
var err error
ts := &testServer{network: network, addr: addr, multicore: multicore, async: async, nclients: nclients,
bytesPool: pool.NewBytesPool(), workerPool: pool.NewWorkerPool()}
if network == "unix" {
_ = os.RemoveAll(addr)
defer os.RemoveAll(addr)
err = Serve(ts, network+"://"+addr, WithMulticore(multicore), WithTicker(true), WithTCPKeepAlive(time.Minute*5))
} else {
if reuseport {
err = Serve(ts, network+"://"+addr, WithMulticore(multicore), WithReusePort(true), WithTicker(true), WithTCPKeepAlive(time.Minute*5))
} else {
err = Serve(ts, network+"://"+addr, WithMulticore(multicore), WithTicker(true), WithTCPKeepAlive(time.Minute*5))
}
}
if err != nil {
panic(err)
}
}
func startClient(network, addr string, multicore, async bool) {
rand.Seed(time.Now().UnixNano())
c, err := net.Dial(network, addr)
if err != nil {
panic(err)
}
defer c.Close()
rd := bufio.NewReader(c)
if network != "udp" {
msg, err := rd.ReadBytes('\n')
if err != nil {
panic(err)
}
if string(msg) != "sweetness\r\n" {
panic("bad header")
}
}
duration := time.Duration((rand.Float64()*2+1)*float64(time.Second)) / 8
start := time.Now()
for time.Since(start) < duration {
//sz := rand.Intn(10) * (1024 * 1024)
sz := 1024 * 1024
data := make([]byte, sz)
if network == "udp" {
n := 64
//if sz < 64 {
// n = sz
//}
data = data[:n]
}
if _, err := rand.Read(data); err != nil {
panic(err)
}
if _, err := c.Write(data); err != nil {
panic(err)
}
data2 := make([]byte, len(data))
if _, err := io.ReadFull(rd, data2); err != nil {
panic(err)
}
if string(data) != string(data2) && !async {
panic(fmt.Sprintf("mismatch %s/multi-core:%t: %d vs %d bytes\n", network, multicore, len(data), len(data2)))
}
}
}
func must(err error) {
if err != nil {
panic(err)
}
}
func TestTick(t *testing.T) {
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
testTick("tcp", ":9991")
}()
wg.Add(1)
go func() {
defer wg.Done()
testTick("unix", "socket1")
}()
wg.Wait()
}
type testTickServer struct {
*EventServer
count int
}
func (t *testTickServer) Tick() (delay time.Duration, action Action) {
if t.count == 25 {
action = Shutdown
return
}
t.count++
delay = time.Millisecond * 10
return
}
func testTick(network, addr string) {
events := &testTickServer{}
start := time.Now()
opts := Options{Ticker: true}
must(Serve(events, network+"://"+addr, WithOptions(opts)))
dur := time.Since(start)
if dur < 250&time.Millisecond || dur > time.Second {
panic("bad ticker timing")
}
}
func TestShutdown(t *testing.T) {
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
testShutdown("tcp", ":9991")
}()
wg.Add(1)
go func() {
defer wg.Done()
testShutdown("unix", "socket1")
}()
wg.Wait()
}
type testShutdownServer struct {
*EventServer
network string
addr string
count int
clients int64
N int
}
func (t *testShutdownServer) OnOpened(c Conn) (out []byte, action Action) {
atomic.AddInt64(&t.clients, 1)
return
}
func (t *testShutdownServer) OnClosed(c Conn, err error) (action Action) {
atomic.AddInt64(&t.clients, -1)
return
}
func (t *testShutdownServer) Tick() (delay time.Duration, action Action) {
if t.count == 0 {
// start clients
for i := 0; i < t.N; i++ {
go func() {
conn, err := net.Dial(t.network, t.addr)
must(err)
defer conn.Close()
_, err = conn.Read([]byte{0})
if err == nil {
panic("expected error")
}
}()
}
} else {
if int(atomic.LoadInt64(&t.clients)) == t.N {
action = Shutdown
}
}
t.count++
delay = time.Second / 20
return
}
func testShutdown(network, addr string) {
events := &testShutdownServer{network: network, addr: addr, N: 10}
must(Serve(events, network+"://"+addr, WithTicker(true)))
if events.clients != 0 {
panic("did not call close on all clients")
}
}
type testBadAddrServer struct {
*EventServer
}
func (t *testBadAddrServer) OnInitComplete(srv Server) (action Action) {
return Shutdown
}
func TestBadAddresses(t *testing.T) {
events := new(testBadAddrServer)
if err := Serve(events, "tulip://howdy"); err == nil {
t.Fatalf("expected error")
}
if err := Serve(events, "howdy"); err == nil {
t.Fatalf("expected error")
}
if err := Serve(events, "tcp://"); err != nil {
t.Fatalf("expected nil, got '%v'", err)
}
}