RTCPeerConnection-getStats-timestamp.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webrtc/RTCPeerConnection-getStats-timestamp.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<meta name="timeout" content="long">

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

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

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

<script>

'use strict';

// It is not possible to make `Date.now()` and `performance.timeOrigin +

// performance.now()` diverge inside of WPTs, so implementers beware that these

// tests may give FALSE positives if `timestamp` is implemented as Wall Clock.

// TODO: crbug.com/372749742 - Timestamps from RTCStats differs slightly from

// performance.timeOrigin + performance.now(). We add an epsilon to the

// timestamp checks as a workaround to avoid making the tests flaky.

const kTimeEpsilon = 0.2;

promise_test(async t => {

  const pc = new RTCPeerConnection();

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

  const t0 = performance.timeOrigin + performance.now();

  const report = await pc.getStats();

  const t1 = performance.timeOrigin + performance.now();

  // Any locally sourced RTCStats would do for this test but we have to pick one

  // for consistency between test runs and make no assumption about stats report

  // iteration order.

  const peerConnectionStats =

      report.values().find(stats => stats.type == 'peer-connection');

  assert_less_than_equal(t0, peerConnectionStats.timestamp + kTimeEpsilon,

      't0 < timestamp');

  assert_less_than_equal(peerConnectionStats.timestamp, t1 + kTimeEpsilon,

      'timestamp < t1');

}, 'RTCStats.timestamp is expressed as Performance time');

promise_test(async t => {

  const pc1 = new RTCPeerConnection();

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

  const pc2 = new RTCPeerConnection();

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

  // Media is needed for RTCP reports.

  const stream = await getNoiseStream({video: true});

  const [track] = stream.getTracks();

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

  pc1.addTrack(track);

  // Negotiate and ICE connect.

  pc1.onicecandidate = e => pc2.addIceCandidate(e.candidate);

  pc2.onicecandidate = e => pc1.addIceCandidate(e.candidate);

  await pc1.setLocalDescription();

  await pc2.setRemoteDescription(pc1.localDescription);

  await pc2.setLocalDescription();

  await pc1.setRemoteDescription(pc2.localDescription);

  // The report won't contain RTCP stats objects until the first RTCP report is

  // received. This can take several seconds so we poll `getStats()` in a loop.

  const t0 = performance.timeOrigin + performance.now();

  let remoteInboundRtp = null;

  while (remoteInboundRtp == null) {

    // When https://crbug.com/369369568 is fixed consider clearing stats cache

    // here (e.g. SLD) and then making the interval tighter by updating `t0` to

    // "now" if `remoteInboundRtp` was missing.

    const report = await pc1.getStats();

    remoteInboundRtp =

        report.values().find(stats => stats.type == 'remote-inbound-rtp');

  const t1 = performance.timeOrigin + performance.now();

  assert_less_than_equal(t0, remoteInboundRtp.timestamp + kTimeEpsilon,

      't0 < timestamp');

  assert_less_than_equal(remoteInboundRtp.timestamp, t1 + kTimeEpsilon,

      'timestamp < t1');

}, 'RTCRemoteInboundRtpStats.timestamp is expressed as Performance time');

</script>