ed_value('animation-timeline', '--test');
test_computed_value('animation-timeline', '--test1, --test2');
test_computed_value('animation-timeline', '--test1, --test2, none, --test3, auto');

test(() => {
  let style = getComputedStyle(document.getElementById('target'));
  assert_not_equals(Array.from(style).indexOf('animation-timeline'), -1);
}, 'The animation-timeline property shows up in CSSStyleDeclaration enumeration');

test(() => {
  let style = document.getElementById('target').style;
  assert_not_equ