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<title>RTCRtpTransceiver.prototype.stop</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>
// FIXME: Add a test adding a transceiver, stopping it and trying to create an empty offer.

promise_test(async (t)=> {
    const pc1 = new RTCPeerConnection();
    t.add_cleanup(() => pc1.close());

    pc1.addTransceiver("audio", { direction: "sendonly" });
    pc1.addTransceiver("video");
    pc1.getTransceivers()[0].stop();

    const offer = await pc1.createOffer();

    assert_false(offer.sdp.includes("m=audio"), "offer should not contain an audio m-section");
    assert_true(offer.sdp.includes("m=video"), "offer should contain a video m-section");
}, "A transceiver added and stopped before the initial offer generation should not trigger an offer m-section generation");

promise_test(async (t)=> {
    const pc1 = new RTCPeerConnection();
    t.add_cleanup(() => pc1.close());

    pc1.addTransceiver("audio", { direction: "sendonly" });
    pc1.addTransceiver("video");
    assert_equals(null, pc1.getTransceivers()[1].receiver.transport);

    pc1.getTransceivers()[1].stop();
    assert_equals(pc1.getTransceivers()[1].receiver.transport, null);
}, "A transceiver added and stopped should not crash when getting receiver's transport");

promise_test(async (t)=> {
    const pc1 = new RTCPeerConnection();
    const pc2 = new RTCPeerConnection();
    t.add_cleanup(() => pc1.close());
    t.add_cleanup(() => pc2.close());

    pc1.addTransceiver("audio");

    await exchangeOfferAnswer(pc1, pc2);

    pc1.addTransceiver("video");

    pc1.getTransceivers()[0].stop();
    pc1.getTransceivers()[1].stop();

    const offer = await pc1.createOffer();

    assert_true(offer.sdp.includes("m=audio"), "offer should contain an audio m-section");
    assert_true(offer.sdp.includes("m=audio 0"), "The audio m-section should be rejected");

    assert_false(offer.sdp.includes("m=video"), "offer should not contain a video m-section");
}, "During renegotiation, adding and stopping a transceiver should not trigger a renegotiated offer m-section generation");

promise_test(async (t)=> {
    const pc1 = new RTCPeerConnection();
    const pc2 = new RTCPeerConnection();
    t.add_cleanup(() => pc1.close());
    t.add_cleanup(() => pc2.close());

    pc1.addTransceiver("audio");

    await exchangeOfferAnswer(pc1, pc2);

    pc1.getTransceivers()[0].direction = "sendonly";
    pc1.getTransceivers()[0].stop();

    const offer = await pc1.createOffer();

    assert_true(offer.sdp.includes("a=inactive"), "The audio m-section should be inactive");
}, "A stopped sendonly transceiver should generate an inactive m-section in the offer");

promise_test(async (t)=> {
    const pc1 = new RTCPeerConnection();
    const pc2 = new RTCPeerConnection();
    t.add_cleanup(() => pc1.close());
    t.add_cleanup(() => pc2.close());

    pc1.addTransceiver("audio");

    await exchangeOfferAnswer(pc1, pc2);

    pc1.getTransceivers()[0].direction = "inactive";
    pc1.getTransceivers()[0].stop();

    const offer = await pc1.createOffer();

    assert_true(offer.sdp.includes("a=inactive"), "The audio m-section should be inactive");
}, "A stopped inactive transceiver should generate an inactive m-section in the offer");

promise_test(async (t) => {
  const pc1 = new RTCPeerConnection();
  const pc2 = new RTCPeerConnection();
  t.add_cleanup(() => pc1.close());
  t.add_cleanup(() => pc2.close());
  pc1.addTransceiver("audio");
  await exchangeOfferAnswer(pc1, pc2);
  pc1.getTransceivers()[0].stop();
  await exchangeOfferAnswer(pc1, pc2);
  await pc1.setLocalDescription(await pc1.createOffer());
}, 'If a transceiver is stopped locally, setting a locally generated answer should still work');

promise_test(async (t) => {
  const pc1 = new RTCPeerConnection();
  const pc2 = new RTCPeerConnection();
  t.add_cleanup(() => pc1.close());
  t.add_cleanup(() => pc2.close());
  pc1.addTransceiver("audio");
  await exchangeOfferAnswer(pc1, pc2);
  pc2.getTransceivers()[0].stop();
  await exchangeOfferAnswer(pc2, pc1);
  await pc1.setLocalDescription(await pc1.createOffer());
}, 'If a transceiver is stopped remotely, setting a locally generated answer should still work');

promise_test(async (t) => {
  const pc1 = new RTCPeerConnection();
  const pc2 = new RTCPeerConnection();
  t.add_cleanup(() => pc1.close());
  t.add_cleanup(() => pc2.close());
  pc1.addTransceiver("audio");
  await exchangeOfferAnswer(pc1, pc2);
  assert_equals(pc1.getTransceivers().length, 1);
  assert_equals(pc2.getTransceivers().length, 1);
  pc1.getTransceivers()[0].stop();
  await exchangeOfferAnswer(pc1, pc2);
  assert_equals(pc1.getTransceivers().length, 0);
  assert_equals(pc2.getTransceivers().length, 0);
  assert_equals(pc1.getSenders().length, 0, 'caller senders');
  assert_equals(pc1.getReceivers().length, 0, 'caller receivers');
  assert_equals(pc2.getSenders().length, 0, 'callee senders');
  assert_equals(pc2.getReceivers().length, 0, 'callee receivers');
}, 'If a transceiver is stopped, transceivers, senders and receivers should disappear after offer/answer');

promise_test(async (t) => {
  const pc1 = new RTCPeerConnection();
  const pc2 = new RTCPeerConnection();
  t.add_cleanup(() => pc1.close());
  t.add_cleanup(() => pc2.close());
  pc1.addTransceiver("audio");
  await exchangeOfferAnswer(pc1, pc2);
  assert_equals(pc1.getTransceivers().length, 1);
  assert_equals(pc2.getTransceivers().length, 1);
  pc1Transceiver = pc1.getTransceivers()[0];
  pc2Transceiver = pc2.getTransceivers()[0];
  pc1.getTransceivers()[0].stop();
  await exchangeOfferAnswer(pc1, pc2);
  assert_equals(pc1Transceiver.direction, 'stopped');
  assert_equals(pc2Transceiver.direction, 'stopped');
}, 'If a transceiver is stopped, transceivers should end up in state stopped');

</script>
