RTCRtpReceiver-getContributingSources.https.html

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This WPT test may be referenced by the following Test IDs:
- /webrtc/RTCRtpReceiver-getContributingSources.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>RTCRtpReceiver.prototype.getContributingSources</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="RTCPeerConnection-helper.js"></script>

<script>

'use strict';

async function connectAndExpectNoCsrcs(t, kind) {

  const pc1 = new RTCPeerConnection();

  t.add_cleanup(() => pc1.close());

  const pc2 = new RTCPeerConnection();

  t.add_cleanup(() => pc2.close());

  const stream = await getNoiseStream({[kind]:true});

  const [track] = stream.getTracks();

  t.add_cleanup(() => track.stop());

  pc1.addTrack(track, stream);

  exchangeIceCandidates(pc1, pc2);

  const trackEvent = await exchangeOfferAndListenToOntrack(t, pc1, pc2);

  await exchangeAnswer(pc1, pc2);

  // Some browsers might need an audio element attached to the DOM.

  const element = document.createElement(kind);

  element.autoplay = true;

  element.srcObject = trackEvent.streams[0];

  document.body.appendChild(element);

  t.add_cleanup(() => { document.body.removeChild(element) });

  assert_array_equals(trackEvent.receiver.getContributingSources(), []);

promise_test(async t => {

  await connectAndExpectNoCsrcs(t, 'audio');

}, '[audio] getContributingSources() returns an empty list in loopback call');

promise_test(async t => {

  await connectAndExpectNoCsrcs(t, 'video');

}, '[video] getContributingSources() returns an empty list in loopback call');

</script>