[event-dispatch.tentative.html]
  [Before -> Idle (Animation.timeline = null)]
    expected:
      if not nightly_build: FAIL

  [Active -> Idle, no delay (Animation.timeline = null)]
    expected:
      if not nightly_build: FAIL

  [Active -> Idle, with positive delay (Animation.timeline = null)]
    expected:
      if not nightly_build: FAIL

  [Active -> Idle, with negative delay (Animation.timeline = null)]
    expected:
      if not nightly_build: FAIL

  [Set timeline and play transition after clear the timeline]
    expected:
      if not nightly_build: FAIL
