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<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection Simulcast Offer</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
// Tests for the construction of offers with simulcast according to:
// draft-ietf-mmusic-sdp-simulcast-13
// draft-ietf-mmusic-rid-15
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const expected_rids = ['foo', 'bar', 'baz'];
pc.addTransceiver('video', {
sendEncodings: expected_rids.map(rid => ({rid}))
});
const offer = await pc.createOffer();
let offer_lines = offer.sdp.split('\r\n');
// Check for a RID line for each layer.
for (const rid of expected_rids) {
let result = offer_lines.find(line => line.startsWith(`a=rid:${rid}`));
assert_not_equals(result, undefined, `RID attribute for '${rid}' missing.`);
}
// Check for simulcast attribute with send direction and all RIDs.
let result = offer_lines.find(
line => line.startsWith(`a=simulcast:send ${expected_rids.join(';')}`));
assert_not_equals(result, undefined, "Could not find simulcast attribute.");
}, 'createOffer() with multiple send encodings should create simulcast offer');
</script>
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