chromium/third_party/blink/web_tests/external/wpt/css/css-properties-values-api/animation/custom-property-transition-transform-list.html

<!DOCTYPE html>
<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/utils.js"></script>
<div id="target"></div>
<script>

transition_test({
  syntax: "<transform-list>",
  from: "translateX(100px) scale(2)",
  to: "translateX(200px) scale(4)",
  expected: "translateX(150px) scale(3)",
  behavior: 'allow-discrete',
}, 'A custom property of type <transform-list> can yield a CSS Transition');

</script>