peerjs/__test__/faker.ts

import { WebSocket } from "mock-socket";
import "webrtc-adapter";

const fakeGlobals = {
	WebSocket,
	MediaStream: class MediaStream {
		private readonly _tracks: MediaStreamTrack[] = [];

		constructor(tracks?: MediaStreamTrack[]) {
			if (tracks) {
				this._tracks = tracks;
			}
		}

		getTracks(): MediaStreamTrack[] {
			return this._tracks;
		}

		addTrack(track: MediaStreamTrack) {
			this._tracks.push(track);
		}
	},
	MediaStreamTrack: class MediaStreamTrack {
		kind: string;
		id: string;

		private static _idCounter = 0;

		constructor() {
			this.id = `track#${fakeGlobals.MediaStreamTrack._idCounter++}`;
		}
	},
	RTCPeerConnection: class RTCPeerConnection {
		private _senders: RTCRtpSender[] = [];

		close() {}

		addTrack(track: MediaStreamTrack, ..._stream: MediaStream[]): RTCRtpSender {
			const newSender = new RTCRtpSender();
			newSender.replaceTrack(track);

			this._senders.push(newSender);

			return newSender;
		}

		// removeTrack(_: RTCRtpSender): void { }

		getSenders(): RTCRtpSender[] {
			return this._senders;
		}
	},
	RTCRtpSender: class RTCRtpSender {
		readonly dtmf: RTCDTMFSender | null;
		readonly rtcpTransport: RTCDtlsTransport | null;
		track: MediaStreamTrack | null;
		readonly transport: RTCDtlsTransport | null;

		replaceTrack(withTrack: MediaStreamTrack | null): Promise<void> {
			this.track = withTrack;

			return Promise.resolve();
		}
	},
};

Object.assign(global, fakeGlobals);
Object.assign(window, fakeGlobals);