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<!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);
assert_equals(callerSender.getParameters().headerExtensions.length, 0,
"caller header extensions before offer");
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");
assert_greater_than(callerSender.getParameters().headerExtensions.length, 0,
"caller header extensions after answer");
}, 'getParameters() surfaces codecs on two-way sender with addTrack at the right time');
</script>
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