css/css-animations/animation-multiple-from-to-keyframes-with-only-timing-function.html

<!doctype html>
<meta charset=utf-8>
<title>Multiple from and to keyframes</title>
<link rel="help" href="https://drafts.csswg.org/css-animations-1/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/testcommon.js"></script>
<style>

@keyframes multiple-from-to-keyframes {
    from, to { animation-timing-function: cubic-bezier(0, 0, 1, 1) }
    from { left: 50px }
    to { left: 150px }
}

</style>
<div id="log"></div>
<script>
'use strict';

test(t => {
  const div = addDiv(t);
  div.style.animation = 'multiple-from-to-keyframes 100s -50s linear';
  assert_equals(getComputedStyle(div).left, "100px");
}, 'Animations should not use an implicit value when the first rule within a @keyframes rule specifies "from" and "to" but only specifies a timing function.');

</script>