| This is a testharness.js-based test. | |
| FAIL setParameters with degradationPreference set should succeed Failed to execute 'addTransceiver' on 'RTCPeerConnection': This operation is only supported in 'unified-plan'. | |
| FAIL setParameters with degradationPreference unset should succeed Failed to execute 'addTransceiver' on 'RTCPeerConnection': This operation is only supported in 'unified-plan'. | |
| Harness: the test ran to completion. | |