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package codecs
import (
"errors"
"reflect"
"testing"
)
func TestVP8Packet_Unmarshal(t *testing.T) {
pck := VP8Packet{}
// Nil packet
raw, err := pck.Unmarshal(nil)
if raw != nil {
t.Fatal("Result should be nil in case of error")
}
if !errors.Is(err, errNilPacket) {
t.Fatal("Error should be:", errNilPacket)
}
// Nil payload
raw, err = pck.Unmarshal([]byte{})
if raw != nil {
t.Fatal("Result should be nil in case of error")
}
if !errors.Is(err, errShortPacket) {
t.Fatal("Error should be:", errShortPacket)
}
// Payload smaller than header size
raw, err = pck.Unmarshal([]byte{0x00, 0x11, 0x22})
if raw != nil {
t.Fatal("Result should be nil in case of error")
}
if !errors.Is(err, errShortPacket) {
t.Fatal("Error should be:", errShortPacket)
}
// Normal payload
raw, err = pck.Unmarshal([]byte{0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x90})
if raw == nil {
t.Fatal("Result shouldn't be nil in case of success")
}
if err != nil {
t.Fatal("Error should be nil in case of success")
}
// Header size, only X
raw, err = pck.Unmarshal([]byte{0x80, 0x00, 0x00, 0x00})
if raw == nil {
t.Fatal("Result shouldn't be nil in case of success")
}
if err != nil {
t.Fatal("Error should be nil in case of success")
}
// Header size, X and I
raw, err = pck.Unmarshal([]byte{0x80, 0x80, 0x00, 0x00})
if raw == nil {
t.Fatal("Result shouldn't be nil in case of success")
}
if err != nil {
t.Fatal("Error should be nil in case of success")
}
// Header size, X and I, PID 16bits
raw, err = pck.Unmarshal([]byte{0x80, 0x80, 0x81, 0x00})
if raw != nil {
t.Fatal("Result should be nil in case of error")
}
if !errors.Is(err, errShortPacket) {
t.Fatal("Error should be:", errShortPacket)
}
// Header size, X and L
raw, err = pck.Unmarshal([]byte{0x80, 0x40, 0x00, 0x00})
if raw == nil {
t.Fatal("Result shouldn't be nil in case of success")
}
if err != nil {
t.Fatal("Error should be nil in case of success")
}
// Header size, X and T
raw, err = pck.Unmarshal([]byte{0x80, 0x20, 0x00, 0x00})
if raw == nil {
t.Fatal("Result shouldn't be nil in case of success")
}
if err != nil {
t.Fatal("Error should be nil in case of success")
}
// Header size, X and K
raw, err = pck.Unmarshal([]byte{0x80, 0x10, 0x00, 0x00})
if raw == nil {
t.Fatal("Result shouldn't be nil in case of success")
}
if err != nil {
t.Fatal("Error should be nil in case of success")
}
// Header size, all flags
raw, err = pck.Unmarshal([]byte{0xff, 0xff, 0x00, 0x00})
if raw != nil {
t.Fatal("Result should be nil in case of error")
}
if !errors.Is(err, errShortPacket) {
t.Fatal("Error should be:", errShortPacket)
}
}
func TestVP8Payloader_Payload(t *testing.T) {
testCases := map[string]struct {
payloader VP8Payloader
mtu uint16
payload [][]byte
expected [][][]byte
}{
"WithoutPictureID": {
payloader: VP8Payloader{},
mtu: 2,
payload: [][]byte{
{0x90, 0x90, 0x90},
{0x91, 0x91},
},
expected: [][][]byte{
{{0x10, 0x90}, {0x00, 0x90}, {0x00, 0x90}},
{{0x10, 0x91}, {0x00, 0x91}},
},
},
"WithPictureID_1byte": {
payloader: VP8Payloader{
EnablePictureID: true,
pictureID: 0x20,
},
mtu: 5,
payload: [][]byte{
{0x90, 0x90, 0x90},
{0x91, 0x91},
},
expected: [][][]byte{
{
{0x90, 0x80, 0x20, 0x90, 0x90},
{0x80, 0x80, 0x20, 0x90},
},
{
{0x90, 0x80, 0x21, 0x91, 0x91},
},
},
},
"WithPictureID_2bytes": {
payloader: VP8Payloader{
EnablePictureID: true,
pictureID: 0x120,
},
mtu: 6,
payload: [][]byte{
{0x90, 0x90, 0x90},
{0x91, 0x91},
},
expected: [][][]byte{
{
{0x90, 0x80, 0x81, 0x20, 0x90, 0x90},
{0x80, 0x80, 0x81, 0x20, 0x90},
},
{
{0x90, 0x80, 0x81, 0x21, 0x91, 0x91},
},
},
},
}
for name, testCase := range testCases {
testCase := testCase
t.Run(name, func(t *testing.T) {
pck := testCase.payloader
for i := range testCase.payload {
res := pck.Payload(testCase.mtu, testCase.payload[i])
if !reflect.DeepEqual(testCase.expected[i], res) {
t.Fatalf("Generated packet[%d] differs, expected: %v, got: %v", i, testCase.expected[i], res)
}
}
})
}
t.Run("Error", func(t *testing.T) {
pck := VP8Payloader{}
payload := []byte{0x90, 0x90, 0x90}
// Positive MTU, nil payload
res := pck.Payload(1, nil)
if len(res) != 0 {
t.Fatal("Generated payload should be empty")
}
// Positive MTU, small payload
// MTU of 1 results in fragment size of 0
res = pck.Payload(1, payload)
if len(res) != 0 {
t.Fatal("Generated payload should be empty")
}
})
}
func TestVP8IsPartitionHead(t *testing.T) {
vp8 := &VP8Packet{}
t.Run("SmallPacket", func(t *testing.T) {
if vp8.IsPartitionHead([]byte{0x00}) {
t.Fatal("Small packet should not be the head of a new partition")
}
})
t.Run("SFlagON", func(t *testing.T) {
if !vp8.IsPartitionHead([]byte{0x10, 0x00, 0x00, 0x00}) {
t.Fatal("Packet with S flag should be the head of a new partition")
}
})
t.Run("SFlagOFF", func(t *testing.T) {
if vp8.IsPartitionHead([]byte{0x00, 0x00, 0x00, 0x00}) {
t.Fatal("Packet without S flag should not be the head of a new partition")
}
})
}
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