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<!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>
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