RTCRtpSender-getParameters.html

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This WPT test may be referenced by the following Test IDs:
- /webrtc/RTCRtpSender-getParameters.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>RTCRtpSender.prototype.getParameters</title>

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

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

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

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

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

<script>

  'use strict';

promise_test(async t => {

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

  t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));

  const [track] = stream.getTracks();

  const caller = new RTCPeerConnection();

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

  caller.addTrack(track);

  const callee = new RTCPeerConnection();

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

  callee.addTrack(track);

  var callerSender = caller.getTransceivers()[0].sender;

  assert_equals(callerSender.getParameters().codecs.length, 0);

  const offer = await caller.createOffer();

  await caller.setLocalDescription(offer);

  await callee.setRemoteDescription(offer);

  // Check that it is a single 2-way transceiver.

  assert_equals(callee.getTransceivers().length, 1);

  var calleeSender = callee.getTransceivers()[0].sender;

  assert_equals(calleeSender.getParameters().codecs.length, 0);

  const answer = await callee.createAnswer();

  await callee.setLocalDescription(answer);

  assert_greater_than(calleeSender.getParameters().codecs.length, 0,

                      "callee codecs after answer");

  await caller.setRemoteDescription(answer);

  assert_greater_than(callerSender.getParameters().codecs.length, 0,

                      "caller codecs after answer");

}, 'getParameters() surfaces codecs on two-way sender with addTrack at the right time');

</script>