This is a testharness.js-based test.
[FAIL] TextTrack.activeCues, empty list
assert_not_equals: t1.activeCues and t2.activeCues should be different objects got disallowed value null
[FAIL] TextTrack.activeCues, after addCue()
assert_equals: t1.activeCues should return same object expected null but got object "[object TextTrackCueList]"
[FAIL] TextTrack.activeCues, different modes
assert_equals: t1.activeCues should return the same object after setting mode to showing expected null but got object "[object TextTrackCueList]"
[FAIL] TextTrack.activeCues, video loading
assert_equals: t1.activeCues should return the same object after loading a video expected null but got object "[object TextTrackCueList]"
[FAIL] TextTrack.activeCues, video playing
assert_unreached: Reached unreachable code
[FAIL] TextTrack.activeCues, adding cue during playback
assert_unreached: Reached unreachable code
Harness: the test ran to completion.