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package nack
import (
"testing"
"time"
"github.com/pion/interceptor"
"github.com/pion/interceptor/internal/test"
"github.com/pion/logging"
"github.com/pion/rtcp"
"github.com/pion/rtp"
"github.com/stretchr/testify/require"
)
func TestResponderInterceptor(t *testing.T) {
tests := []struct {
name string
opts []ResponderOption
}{
{
name: "with copy",
opts: []ResponderOption{
ResponderSize(8),
ResponderLog(logging.NewDefaultLoggerFactory().NewLogger("test")),
},
},
{
name: "without copy",
opts: []ResponderOption{
ResponderSize(8),
ResponderLog(logging.NewDefaultLoggerFactory().NewLogger("test")),
DisableCopy(),
},
},
}
for _, item := range tests {
item := item
t.Run(item.name, func(t *testing.T) {
f, err := NewResponderInterceptor(item.opts...)
require.NoError(t, err)
i, err := f.NewInterceptor("")
require.NoError(t, err)
stream := test.NewMockStream(&interceptor.StreamInfo{
SSRC: 1,
RTCPFeedback: []interceptor.RTCPFeedback{{Type: "nack"}},
}, i)
defer func() {
require.NoError(t, stream.Close())
}()
for _, seqNum := range []uint16{10, 11, 12, 14, 15} {
require.NoError(t, stream.WriteRTP(&rtp.Packet{Header: rtp.Header{SequenceNumber: seqNum}}))
select {
case p := <-stream.WrittenRTP():
require.Equal(t, seqNum, p.SequenceNumber)
case <-time.After(10 * time.Millisecond):
t.Fatal("written rtp packet not found")
}
}
stream.ReceiveRTCP([]rtcp.Packet{
&rtcp.TransportLayerNack{
MediaSSRC: 1,
SenderSSRC: 2,
Nacks: []rtcp.NackPair{
{PacketID: 11, LostPackets: 0b1011}, // sequence numbers: 11, 12, 13, 15
},
},
})
// seq number 13 was never sent, so it can't be resent
for _, seqNum := range []uint16{11, 12, 15} {
select {
case p := <-stream.WrittenRTP():
require.Equal(t, seqNum, p.SequenceNumber)
case <-time.After(10 * time.Millisecond):
t.Fatal("written rtp packet not found")
}
}
select {
case p := <-stream.WrittenRTP():
t.Errorf("no more rtp packets expected, found sequence number: %v", p.SequenceNumber)
case <-time.After(10 * time.Millisecond):
}
})
}
}
func TestResponderInterceptor_InvalidSize(t *testing.T) {
f, _ := NewResponderInterceptor(ResponderSize(5))
_, err := f.NewInterceptor("")
require.Error(t, err, ErrInvalidSize)
}
func TestResponderInterceptor_DisableCopy(t *testing.T) {
f, err := NewResponderInterceptor(
ResponderSize(8),
ResponderLog(logging.NewDefaultLoggerFactory().NewLogger("test")),
DisableCopy(),
)
require.NoError(t, err)
i, err := f.NewInterceptor("id")
require.NoError(t, err)
_, ok := i.(*ResponderInterceptor).packetFactory.(*noOpPacketFactory)
require.True(t, ok)
}
// this test is only useful when being run with the race detector, it won't fail otherwise:
//
// go test -race ./pkg/nack/
func TestResponderInterceptor_Race(t *testing.T) {
f, err := NewResponderInterceptor(
ResponderSize(32768),
ResponderLog(logging.NewDefaultLoggerFactory().NewLogger("test")),
)
require.NoError(t, err)
i, err := f.NewInterceptor("")
require.NoError(t, err)
stream := test.NewMockStream(&interceptor.StreamInfo{
SSRC: 1,
RTCPFeedback: []interceptor.RTCPFeedback{{Type: "nack"}},
}, i)
for seqNum := uint16(0); seqNum < 500; seqNum++ {
require.NoError(t, stream.WriteRTP(&rtp.Packet{Header: rtp.Header{SequenceNumber: seqNum}}))
// 25% packet loss
if seqNum%4 == 0 {
time.Sleep(time.Duration(seqNum%23) * time.Millisecond)
stream.ReceiveRTCP([]rtcp.Packet{
&rtcp.TransportLayerNack{
MediaSSRC: 1,
SenderSSRC: 2,
Nacks: []rtcp.NackPair{
{PacketID: seqNum, LostPackets: 0},
},
},
})
}
}
}
|
