video_socket-server/client/test/unit/server-recording-peer.test.js

import { jest } from '@jest/globals';
import { ServerRecordingPeer } from '../../public/call/media/server-recording-peer.js';

function createTrack(kind, id) {
    return {
        kind,
        id,
        readyState: 'live'
    };
}

function createStream(tracks) {
    return {
        getTracks() {
            return tracks;
        }
    };
}

describe('ServerRecordingPeer', () => {
    test('queues remote candidates until answer is applied', async () => {
        const originalRTCPeerConnection = window.RTCPeerConnection;
        const originalRTCSessionDescription = window.RTCSessionDescription;
        const originalRTCIceCandidate = window.RTCIceCandidate;
        class FakeRTCPeerConnection {
            constructor() {
                this.localDescription = null;
                this.remoteDescription = null;
                this.candidates = [];
            }

            addTransceiver() {}

            async createOffer() {
                return { type: 'offer', sdp: 'test-offer-sdp' };
            }

            async setLocalDescription(description) {
                this.localDescription = description;
            }

            async setRemoteDescription(description) {
                this.remoteDescription = description;
            }

            async addIceCandidate(candidate) {
                if (!this.remoteDescription) {
                    throw new Error('remote description missing');
                }
                this.candidates.push(candidate);
            }

            close() {}
        }

        window.RTCPeerConnection = FakeRTCPeerConnection;
        window.RTCSessionDescription = class {
            constructor(init) {
                Object.assign(this, init);
            }
        };
        window.RTCIceCandidate = class {
            constructor(init) {
                Object.assign(this, init);
            }
        };

        const signaling = {
            sendRecordingOffer: jest.fn(),
            sendRecordingCandidate: jest.fn()
        };
        const peer = new ServerRecordingPeer({
            rtcConfiguration: {},
            getLocalStream: () => createStream([createTrack('video', 'video-1')]),
            getSignaling: () => signaling,
            getConnectionId: () => 'room-1',
            getParticipantId: () => 'participant-1'
        });

        await peer.start({
            recordingId: 'recording-1',
            connectionId: 'room-1'
        });

        await expect(peer.addIceCandidate({
            recordingId: 'recording-1',
            candidate: 'candidate:1',
            sdpMid: '0',
            sdpMLineIndex: 0
        })).resolves.toBeUndefined();

        const state = peer.peers.get('recording-1');
        expect(state.pendingCandidates).toHaveLength(1);
        expect(state.pc.candidates).toHaveLength(0);

        await peer.applyAnswer({
            recordingId: 'recording-1',
            sdp: 'test-answer-sdp'
        });

        expect(state.pendingCandidates).toHaveLength(0);
        expect(state.pc.candidates).toHaveLength(1);

        window.RTCPeerConnection = originalRTCPeerConnection;
        window.RTCSessionDescription = originalRTCSessionDescription;
        window.RTCIceCandidate = originalRTCIceCandidate;
    });
});