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package quic
import (
"net"
"testing"
"time"
"github.com/quic-go/quic-go/internal/protocol"
"github.com/quic-go/quic-go/internal/synctest"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.uber.org/mock/gomock"
)
func getPacketWithContents(b []byte) *packetBuffer {
buf := getPacketBuffer()
buf.Data = buf.Data[:len(b)]
copy(buf.Data, b)
return buf
}
func TestSendQueueSendOnePacket(t *testing.T) {
synctest.Test(t, func(t *testing.T) {
mockCtrl := gomock.NewController(t)
c := NewMockSendConn(mockCtrl)
q := newSendQueue(c)
written := make(chan struct{})
c.EXPECT().Write([]byte("foobar"), uint16(10), protocol.ECT1).Do(
func([]byte, uint16, protocol.ECN) error { close(written); return nil },
)
done := make(chan struct{})
go func() {
q.Run()
close(done)
}()
q.Send(getPacketWithContents([]byte("foobar")), 10, protocol.ECT1)
synctest.Wait()
select {
case <-written:
default:
t.Fatal("write should have returned")
}
q.Close()
synctest.Wait()
select {
case <-done:
default:
t.Fatal("Run should have returned")
}
})
}
func TestSendQueueBlocking(t *testing.T) {
synctest.Test(t, func(t *testing.T) {
mockCtrl := gomock.NewController(t)
c := NewMockSendConn(mockCtrl)
q := newSendQueue(c)
blockWrite := make(chan struct{})
written := make(chan struct{}, 1)
c.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any()).Do(
func([]byte, uint16, protocol.ECN) error {
select {
case written <- struct{}{}:
default:
}
<-blockWrite
return nil
},
).AnyTimes()
done := make(chan struct{})
go func() {
q.Run()
close(done)
}()
// +1, since one packet will be queued in the Write call
for i := range sendQueueCapacity + 1 {
require.False(t, q.WouldBlock())
q.Send(getPacketWithContents([]byte("foobar")), 10, protocol.ECT1)
// make sure that the first packet is actually enqueued in the Write call
if i == 0 {
select {
case <-written:
case <-time.After(time.Second):
t.Fatal("timeout")
}
}
}
require.True(t, q.WouldBlock())
select {
case <-q.Available():
t.Fatal("should not be available")
default:
}
require.Panics(t, func() { q.Send(getPacketWithContents([]byte("foobar")), 10, protocol.ECT1) })
// allow one packet to be sent
blockWrite <- struct{}{}
select {
case <-written:
case <-time.After(time.Second):
t.Fatal("timeout")
}
select {
case <-q.Available():
require.False(t, q.WouldBlock())
case <-time.After(time.Second):
t.Fatal("timeout")
}
// when calling Close, all packets are first sent out
closed := make(chan struct{})
go func() {
q.Close()
close(closed)
}()
synctest.Wait()
select {
case <-closed:
t.Fatal("Close should have blocked")
default:
}
for range sendQueueCapacity {
blockWrite <- struct{}{}
}
synctest.Wait()
select {
case <-closed:
default:
t.Fatal("Close should have returned")
}
select {
case <-done:
default:
t.Fatal("Run should have returned")
}
})
}
func TestSendQueueWriteError(t *testing.T) {
synctest.Test(t, func(t *testing.T) {
mockCtrl := gomock.NewController(t)
c := NewMockSendConn(mockCtrl)
q := newSendQueue(c)
c.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any()).Return(assert.AnError)
q.Send(getPacketWithContents([]byte("foobar")), 6, protocol.ECNNon)
errChan := make(chan error, 1)
go func() { errChan <- q.Run() }()
synctest.Wait()
select {
case err := <-errChan:
require.ErrorIs(t, err, assert.AnError)
default:
t.Fatal("Run should have returned")
}
// further calls to Send should not block
sent := make(chan struct{})
go func() {
defer close(sent)
for range 2 * sendQueueCapacity {
q.Send(getPacketWithContents([]byte("raboof")), 6, protocol.ECNNon)
}
}()
synctest.Wait()
select {
case <-sent:
default:
t.Fatal("Send should have returned")
}
})
}
func TestSendQueueSendProbe(t *testing.T) {
mockCtrl := gomock.NewController(t)
c := NewMockSendConn(mockCtrl)
q := newSendQueue(c)
addr := &net.UDPAddr{IP: net.IPv4(42, 42, 42, 42), Port: 42}
c.EXPECT().WriteTo([]byte("foobar"), addr)
q.SendProbe(getPacketWithContents([]byte("foobar")), addr)
}
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