[constructor.html]
  type: testharness
  [composite values are parsed correctly when passed to the KeyframeEffectReadOnly constructor in property-indexed keyframes]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1291468

  [composite values are parsed correctly when passed to the KeyframeEffectReadOnly constructor in regular keyframes]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1291468

  [composite values are parsed correctly when passed to the KeyframeEffectReadOnly constructor in KeyframeTimingOptions]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1311620 # This needs additive animation

  [a KeyframeEffectReadOnly can be constructed with a keyframe sequence with different composite values, but the same composite value for a given offset]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1291468

