gopenfusion/cnet/service_test.go

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package cnet_test
import (
"context"
"fmt"
"log"
"net"
"os"
"sync"
"testing"
"time"
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"github.com/CPunch/gopenfusion/cnet"
"github.com/CPunch/gopenfusion/cnet/protocol"
"github.com/CPunch/gopenfusion/util"
"github.com/matryer/is"
)
var (
srvcPort int
)
const (
timeout = 2 * time.Second
maxDummyPeers = 5
)
func TestMain(m *testing.M) {
var err error
srvcPort, err = cnet.RandomPort()
if err != nil {
panic(err)
}
os.Exit(m.Run())
}
func TestService(t *testing.T) {
is := is.New(t)
ctx, cancel := context.WithCancel(context.Background())
srvc := cnet.NewService(ctx, "TEST", srvcPort)
wg := sync.WaitGroup{}
// shutdown service when test is done
defer func() {
cancel()
is.True(util.SelectWithTimeout(srvc.Stopped(), timeout)) // wait for service to stop with timeout
}()
// our dummy packet handler
wg.Add(maxDummyPeers)
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srvc.AddPacketHandler(0x1234, func(peer *cnet.Peer, pkt protocol.Packet) error {
log.Printf("Received packet %#v", pkt)
wg.Done()
return nil
})
// wait for all dummy peers to connect and disconnect
wg.Add(maxDummyPeers)
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srvc.OnConnect = func(peer *cnet.Peer) {
wg.Done()
}
wg.Add(maxDummyPeers)
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srvc.OnDisconnect = func(peer *cnet.Peer) {
wg.Done()
}
// run service
go func() { is.NoErr(srvc.Start()) }() // srvc.Start error
is.True(util.SelectWithTimeout(srvc.Started(), timeout)) // wait for service to start with timeout
wg.Add(maxDummyPeers * 2) // 2 wg.Done() per peer for receiving packets
for i := 0; i < maxDummyPeers; i++ {
go func() {
// make dummy client
conn, err := net.Dial("tcp", fmt.Sprintf("127.0.0.1:%d", srvcPort))
is.NoErr(err) // net.Dial error
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peer := cnet.NewPeer(ctx, conn)
go func() {
defer peer.Kill()
// send dummy packets
for i := 0; i < 2; i++ {
is.NoErr(peer.Send(0x1234)) // peer.Send error
}
}()
// we wait until Handler gracefully exits (peer was killed)
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peer.Handler(make(chan *cnet.PacketEvent))
wg.Done()
}()
}
is.True(util.WaitWithTimeout(&wg, timeout)) // wait for all dummy peers to be done with timeout
}