This is a testharness.js-based test.
Found 29 FAIL, 0 TIMEOUT, 0 NOTRUN.
[FAIL] Partial interface AudioTrack: valid exposure set
  Partial AudioTrack interface is exposed to 'DedicatedWorker', the original interface is not.
[FAIL] Partial interface VideoTrack: valid exposure set
  Partial VideoTrack interface is exposed to 'DedicatedWorker', the original interface is not.
[FAIL] Partial interface TextTrack: valid exposure set
  Partial TextTrack interface is exposed to 'DedicatedWorker', the original interface is not.
[FAIL] SourceBuffer interface: member audioTracks
  assert_false: The prototype object must not have a property "audioTracks" expected false got true
[FAIL] SourceBuffer interface: member videoTracks
  assert_false: The prototype object must not have a property "videoTracks" expected false got true
[FAIL] ManagedMediaSource interface: existence and properties of interface object
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] ManagedMediaSource interface object length
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] ManagedMediaSource interface object name
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] ManagedMediaSource interface: existence and properties of interface prototype object
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] ManagedMediaSource interface: existence and properties of interface prototype object's "constructor" property
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] ManagedMediaSource interface: existence and properties of interface prototype object's @@unscopables property
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] ManagedMediaSource interface: attribute streaming
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] ManagedMediaSource interface: attribute onstartstreaming
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] ManagedMediaSource interface: attribute onendstreaming
  assert_own_property: self does not have own property "ManagedMediaSource" expected property "ManagedMediaSource" missing
[FAIL] BufferedChangeEvent interface: existence and properties of interface object
  assert_own_property: self does not have own property "BufferedChangeEvent" expected property "BufferedChangeEvent" missing
[FAIL] BufferedChangeEvent interface object length
  assert_own_property: self does not have own property "BufferedChangeEvent" expected property "BufferedChangeEvent" missing
[FAIL] BufferedChangeEvent interface object name
  assert_own_property: self does not have own property "BufferedChangeEvent" expected property "BufferedChangeEvent" missing
[FAIL] BufferedChangeEvent interface: existence and properties of interface prototype object
  assert_own_property: self does not have own property "BufferedChangeEvent" expected property "BufferedChangeEvent" missing
[FAIL] BufferedChangeEvent interface: existence and properties of interface prototype object's "constructor" property
  assert_own_property: self does not have own property "BufferedChangeEvent" expected property "BufferedChangeEvent" missing
[FAIL] BufferedChangeEvent interface: existence and properties of interface prototype object's @@unscopables property
  assert_own_property: self does not have own property "BufferedChangeEvent" expected property "BufferedChangeEvent" missing
[FAIL] BufferedChangeEvent interface: attribute addedRanges
  assert_own_property: self does not have own property "BufferedChangeEvent" expected property "BufferedChangeEvent" missing
[FAIL] BufferedChangeEvent interface: attribute removedRanges
  assert_own_property: self does not have own property "BufferedChangeEvent" expected property "BufferedChangeEvent" missing
[FAIL] ManagedSourceBuffer interface: existence and properties of interface object
  assert_own_property: self does not have own property "ManagedSourceBuffer" expected property "ManagedSourceBuffer" missing
[FAIL] ManagedSourceBuffer interface object length
  assert_own_property: self does not have own property "ManagedSourceBuffer" expected property "ManagedSourceBuffer" missing
[FAIL] ManagedSourceBuffer interface object name
  assert_own_property: self does not have own property "ManagedSourceBuffer" expected property "ManagedSourceBuffer" missing
[FAIL] ManagedSourceBuffer interface: existence and properties of interface prototype object
  assert_own_property: self does not have own property "ManagedSourceBuffer" expected property "ManagedSourceBuffer" missing
[FAIL] ManagedSourceBuffer interface: existence and properties of interface prototype object's "constructor" property
  assert_own_property: self does not have own property "ManagedSourceBuffer" expected property "ManagedSourceBuffer" missing
[FAIL] ManagedSourceBuffer interface: existence and properties of interface prototype object's @@unscopables property
  assert_own_property: self does not have own property "ManagedSourceBuffer" expected property "ManagedSourceBuffer" missing
[FAIL] ManagedSourceBuffer interface: attribute onbufferedchange
  assert_own_property: self does not have own property "ManagedSourceBuffer" expected property "ManagedSourceBuffer" missing
Harness: the test ran to completion.