repo_description: End-to-end realtime stack for connecting humans and AI
repo_topics: golang media-server sfu video voice voice-ai webrtc
code: // Copyright 2023 LiveKit, Inc.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  package rtc
  
  import (
  	"math/rand/v2"
  	"strings"
  	"testing"
  
  	"github.com/google/uuid"
  	"github.com/stretchr/testify/require"
  	"google.golang.org/protobuf/proto"
  
  	"github.com/livekit/protocol/livekit"
  	"github.com/livekit/protocol/utils/guid"
  )
  
  func TestPackStreamId(t *testing.T) {
  	packed := "PA_123abc|uuid-id"
  	pID, trackID := UnpackStreamID(packed)
  	require.Equal(t, livekit.ParticipantID("PA_123abc"), pID)
  	require.Equal(t, livekit.TrackID("uuid-id"), trackID)
  
  	require.Equal(t, packed, PackStreamID(pID, trackID))
  }
  
  func TestPackDataTrackLabel(t *testing.T) {
  	pID := livekit.ParticipantID("PA_123abc")
  	trackID := livekit.TrackID("TR_b3da25")
  	label := "trackLabel"
  	packed := "PA_123abc|TR_b3da25|trackLabel"
  	require.Equal(t, packed, PackDataTrackLabel(pID, trackID, label))
  
  	p, tr, l := UnpackDataTrackLabel(packed)
  	require.Equal(t, pID, p)
  	require.Equal(t, trackID, tr)
  	require.Equal(t, label, l)
  }
  
  func TestChunkProtoBatch(t *testing.T) {
  	rng := rand.New(rand.NewPCG(1, 2))
  	var updates []*livekit.ParticipantInfo
  	for range 32 {
  		updates = append(updates, &livekit.ParticipantInfo{
  			Sid:      guid.New(guid.ParticipantPrefix),
  			Identity: uuid.NewString(),
  			Metadata: strings.Repeat("x", rng.IntN(128*1024)),
  		})
  	}
  
  	target := 64 * 1024
  	batches := ChunkProtoBatch(updates, target)
  	var count int
  	for _, b := range batches {
  		var sum int
  		for _, m := range b {
  			sum += proto.Size(m)
  			count++
  		}
  		require.True(t, sum < target || len(b) == 1, "batch size exceeds target")
  	}
  	require.Equal(t, len(updates), count)
  }
  