ransceiver('audio', { direction: 'recvonly' });
    await initialOfferAnswerWithIceGatheringStateTransitions(
        pc1, pc2);

    const pc1waiter = iceGatheringStateTransitions(pc1, 'new');
    const pc2waiter = iceGatheringStateTransitions(pc2, 'new');
    pc1.getTransceivers()[0].stop();
    await pc1.setLocalDescription(await pc1.createOffer());
    await pc2.setRemoteDescription(pc1.localDescription);
    await pc2.setLocalDescription(await pc2.createAnswer());
    assert_equals(pc2.getTransceivers(