webrtc/RTCPeerConnection-plan-b-is-not-supported.html

<!doctype html>
<meta charset=utf-8>
<meta name="timeout" content="long">
<title></title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
'use strict';

promise_test(async t => {
  // Plan B is a legacy feature that should not be supported on a modern
  // browser. To pass this test you must either ignore sdpSemantics altogether
  // (and construct with Unified Plan despite us asking for Plan B) or throw an
  // exception.
  let pc = null;
  try {
    pc = new RTCPeerConnection({sdpSemantics:"plan-b"});
    t.add_cleanup(() => pc.close());
  } catch (e) {
    // Test passed!
    return;
  }
  // If we did not throw, we must not have gotten what we asked for. If
  // sdpSemantics is not recognized by the browser it will be undefined here.
  assert_not_equals(pc.getConfiguration().sdpSemantics, "plan-b");
}, 'Plan B is not supported');

</script>