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<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection.prototype.iceGatheringState</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>
'use strict';
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
pc1.addTransceiver('audio', { direction: 'recvonly' });
await initialOfferAnswerWithIceGatheringStateTransitions(pc1, pc2);
await pc1.setLocalDescription(await pc1.createOffer({iceRestart: true}));
await iceGatheringStateTransitions(pc1, 'gathering', 'complete');
expectNoMoreGatheringStateChanges(t, pc1);
await pc1.setLocalDescription({type: 'rollback'});
await new Promise(r => t.step_timeout(r, 1000));
}, 'rolling back an ICE restart when gathering is complete should not result in iceGatheringState changes');
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
pc1.createDataChannel('test');
await initialOfferAnswerWithIceGatheringStateTransitions(pc1, pc2);
await pc1.setLocalDescription(await pc1.createOffer({iceRestart: true}));
await iceGatheringStateTransitions(pc1, 'gathering', 'complete');
expectNoMoreGatheringStateChanges(t, pc1);
await pc1.setLocalDescription({type: 'rollback'});
await new Promise(r => t.step_timeout(r, 1000));
}, 'rolling back an ICE restart when gathering is complete should not result in iceGatheringState changes (DataChannel case)');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
pc.addTransceiver('audio', { direction: 'recvonly' });
await pc.setLocalDescription();
await iceGatheringStateTransitions(pc, 'gathering', 'complete');
const backToNew = iceGatheringStateTransitions(pc, 'new');
await pc.setLocalDescription({type: 'rollback'});
await backToNew;
}, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "complete"');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
pc.createDataChannel('test');
await pc.setLocalDescription();
await iceGatheringStateTransitions(pc, 'gathering', 'complete');
const backToNew = iceGatheringStateTransitions(pc, 'new');
await pc.setLocalDescription({type: 'rollback'});
await backToNew;
}, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "complete" (DataChannel case)');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
pc.addTransceiver('audio', { direction: 'recvonly' });
await pc.setLocalDescription();
await iceGatheringStateTransitions(pc, 'gathering');
const backToNew = Promise.allSettled([
iceGatheringStateTransitions(pc, 'new'),
iceGatheringStateTransitions(pc, 'complete', 'new')]);
await pc.setLocalDescription({type: 'rollback'});
// We might go directly to 'new', or we might go to 'complete' first,
// depending on timing. Allow either.
const results = await backToNew;
assert_true(results.some(result => result.status == 'fulfilled'),
'ICE gathering state should go back to "new", possibly through "complete"');
}, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "gathering"');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
pc.createDataChannel('test');
await pc.setLocalDescription();
await iceGatheringStateTransitions(pc, 'gathering');
const backToNew = Promise.allSettled([
iceGatheringStateTransitions(pc, 'new'),
iceGatheringStateTransitions(pc, 'complete', 'new')]);
await pc.setLocalDescription({type: 'rollback'});
// We might go directly to 'new', or we might go to 'complete' first,
// depending on timing. Allow either.
const results = await backToNew;
assert_true(results.some(result => result.status == 'fulfilled'),
'ICE gathering state should go back to "new", possibly through "complete"');
}, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "gathering" (DataChannel case)');
</script>
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