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package rtcp
import (
"errors"
"reflect"
"testing"
)
var _ Packet = (*TransportLayerNack)(nil) // assert is a Packet
func TestTransportLayerNackUnmarshal(t *testing.T) {
for _, test := range []struct {
Name string
Data []byte
Want TransportLayerNack
WantError error
}{
{
Name: "valid",
Data: []byte{
// TransportLayerNack
0x81, 0xcd, 0x0, 0x3,
// sender=0x902f9e2e
0x90, 0x2f, 0x9e, 0x2e,
// media=0x902f9e2e
0x90, 0x2f, 0x9e, 0x2e,
// nack 0xAAAA, 0x5555
0xaa, 0xaa, 0x55, 0x55,
},
Want: TransportLayerNack{
SenderSSRC: 0x902f9e2e,
MediaSSRC: 0x902f9e2e,
Nacks: []NackPair{{0xaaaa, 0x5555}},
},
},
{
Name: "short report",
Data: []byte{
0x81, 0xcd, 0x0, 0x2,
// ssrc=0x902f9e2e
0x90, 0x2f, 0x9e, 0x2e,
// report ends early
},
WantError: errPacketTooShort,
},
{
Name: "wrong type",
Data: []byte{
// v=2, p=0, count=1, SR, len=7
0x81, 0xc8, 0x0, 0x7,
// ssrc=0x902f9e2e
0x90, 0x2f, 0x9e, 0x2e,
// ssrc=0xbc5e9a40
0xbc, 0x5e, 0x9a, 0x40,
// fracLost=0, totalLost=0
0x0, 0x0, 0x0, 0x0,
// lastSeq=0x46e1
0x0, 0x0, 0x46, 0xe1,
// jitter=273
0x0, 0x0, 0x1, 0x11,
// lsr=0x9f36432
0x9, 0xf3, 0x64, 0x32,
// delay=150137
0x0, 0x2, 0x4a, 0x79,
},
WantError: errWrongType,
},
{
Name: "nil",
Data: nil,
WantError: errPacketTooShort,
},
} {
var tln TransportLayerNack
err := tln.Unmarshal(test.Data)
if got, want := err, test.WantError; !errors.Is(got, want) {
t.Fatalf("Unmarshal %q rr: err = %v, want %v", test.Name, got, want)
}
if err != nil {
continue
}
if got, want := tln, test.Want; !reflect.DeepEqual(got, want) {
t.Fatalf("Unmarshal %q rr: got %v, want %v", test.Name, got, want)
}
}
}
func TestTransportLayerNackRoundTrip(t *testing.T) {
for _, test := range []struct {
Name string
Report TransportLayerNack
WantError error
}{
{
Name: "valid",
Report: TransportLayerNack{
SenderSSRC: 0x902f9e2e,
MediaSSRC: 0x902f9e2e,
Nacks: []NackPair{{1, 0xAA}, {1034, 0x05}},
},
},
} {
data, err := test.Report.Marshal()
if got, want := err, test.WantError; !errors.Is(got, want) {
t.Fatalf("Marshal %q: err = %v, want %v", test.Name, got, want)
}
if err != nil {
continue
}
var decoded TransportLayerNack
if err := decoded.Unmarshal(data); err != nil {
t.Fatalf("Unmarshal %q: %v", test.Name, err)
}
if got, want := decoded, test.Report; !reflect.DeepEqual(got, want) {
t.Fatalf("%q tln round trip: got %#v, want %#v", test.Name, got, want)
}
}
}
func testNackPair(t *testing.T, s []uint16, n NackPair) {
l := n.PacketList()
if !reflect.DeepEqual(l, s) {
t.Errorf("%v: expected %v, got %v", n, s, l)
}
}
func TestNackPair(t *testing.T) {
testNackPair(t, []uint16{42}, NackPair{42, 0})
testNackPair(t, []uint16{42, 43}, NackPair{42, 1})
testNackPair(t, []uint16{42, 44}, NackPair{42, 2})
testNackPair(t, []uint16{42, 43, 44}, NackPair{42, 3})
testNackPair(t, []uint16{42, 42 + 16}, NackPair{42, 0x8000})
}
func TestNackPairRange(t *testing.T) {
n := NackPair{42, 2}
out := make([]uint16, 0)
n.Range(func(s uint16) bool {
out = append(out, s)
return true
})
if !reflect.DeepEqual(out, []uint16{42, 44}) {
t.Errorf("Got %v", out)
}
out = make([]uint16, 0)
n.Range(func(s uint16) bool {
out = append(out, s)
return false
})
if !reflect.DeepEqual(out, []uint16{42}) {
t.Errorf("Got %v", out)
}
}
func TestTransportLayerNackPairGeneration(t *testing.T) {
for _, test := range []struct {
Name string
SequenceNumbers []uint16
Expected []NackPair
}{
{
"No Sequence Numbers",
[]uint16{},
[]NackPair{},
},
{
"Single Sequence Number",
[]uint16{100},
[]NackPair{
{PacketID: 100, LostPackets: 0x0},
},
},
{
"Multiple in range, Single NACKPair",
[]uint16{100, 101, 105, 115},
[]NackPair{
{PacketID: 100, LostPackets: 0x4011},
},
},
{
"Multiple Ranges, Multiple NACKPair",
[]uint16{100, 117, 500, 501, 502},
[]NackPair{
{PacketID: 100, LostPackets: 0},
{PacketID: 117, LostPackets: 0},
{PacketID: 500, LostPackets: 0x3},
},
},
} {
actual := NackPairsFromSequenceNumbers(test.SequenceNumbers)
if !reflect.DeepEqual(actual, test.Expected) {
t.Fatalf("%q NackPair generation mismatch: got %#v, want %#v", test.Name, actual, test.Expected)
}
}
}
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