<!DOCTYPE HTML>
<html>
<head>
  <script type="application/javascript" src="pc.js"></script>
<body>
<pre id="test">
<script type="application/javascript">
  createHTML({
    bug: "1793776",
    title: "Test that media.peerconnection.sdp.disable_stereo_fmtp works"
  });

  const tests = [
    async function testStereo() {
      const offerer = new RTCPeerConnection();
      offerer.addTransceiver('audio');
      const answerer = new RTCPeerConnection();
      await offerer.setLocalDescription();
      ok(offerer.localDescription.sdp.includes('stereo=1'),
          'Offer uses stereo=1 when media.peerconnection.sdp.disable_stereo_fmtp is not set');
      await answerer.setRemoteDescription(offerer.localDescription);
      const {sdp} = await answerer.createAnswer();
      ok(sdp.includes('stereo=1'), 'Answer uses stereo=1 when media.peerconnection.sdp.disable_stereo_fmtp is not set');
    },

    async function testNoStereo() {
      await pushPrefs(
          ['media.peerconnection.sdp.disable_stereo_fmtp', true]);

      const offerer = new RTCPeerConnection();
      offerer.addTransceiver('audio');
      const answerer = new RTCPeerConnection();
      await offerer.setLocalDescription();
      ok(offerer.localDescription.sdp.includes('stereo=0'),
          'Offer uses stereo=0 when media.peerconnection.sdp.disable_stereo_fmtp is set');
      await answerer.setRemoteDescription(offerer.localDescription);
      const {sdp} = await answerer.createAnswer();
      ok(sdp.includes('stereo=0'), 'Answer uses stereo=0 when media.peerconnection.sdp.disable_stereo_fmtp is set');
    },
  ];

  runNetworkTest(async () => {
    for (const test of tests) {
      info(`Running test: ${test.name}`);
      try {
        await test();
      } catch (e) {
        ok(false, `Caught ${e.name}: ${e.message} ${e.stack}`);
      }
      info(`Done running test: ${test.name}`);
      // Make sure we don't build up a pile of GC work, and also get PCImpl to
      // print their timecards.
      await new Promise(r => SpecialPowers.exactGC(r));
    }

    await SpecialPowers.popPrefEnv();
  });
</script>
</pre>
</body>
</html>
