This is a testharness.js-based test.
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed without any KeyframeEffectOptions object
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by an empty KeyframeEffectOptions object
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by a normal KeyframeEffectOptions object
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by a double value
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by +Infinity
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by an Infinity duration
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by an auto duration
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by an Infinity iterations
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by an auto fill
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] values of getComputedTiming() when a KeyframeEffect is constructed by a forwards fill
  assert_equals: computed startTime expected (number) 0 but got (undefined) undefined
[FAIL] getComputedTiming().startTime for an empty KeyframeEffectOptions object
  assert_equals: expected (number) 0 but got (undefined) undefined
[FAIL] getComputedTiming().startTime for a non-zero duration and delay
  assert_equals: expected (number) 0 but got (undefined) undefined
[FAIL] getComputedTiming().startTime for a negative delay
  assert_equals: expected (number) 0 but got (undefined) undefined
[FAIL] getComputedTiming().startTime for a non-default iteration count and iterationStart
  assert_equals: expected (number) 0 but got (undefined) undefined
[FAIL] getComputedTiming().startTime for an infinite duration
  assert_equals: expected (number) 0 but got (undefined) undefined
Harness: the test ran to completion.