group-animation-for-root-transition.html

<!DOCTYPE html>
<html>
<title>View transitions: group pseudo for the root transition has animation</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:[email protected]">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<script>
promise_test(() => {
  assert_implements(document.startViewTransition, "Missing document.startViewTransition");
  return new Promise(async (resolve, reject) => {
    let transition = document.startViewTransition();
    transition.ready.then(() => {
      let groupAnimationCount = 0;
      let oldAnimationCount = 0;
      let newAnimationCount = 0;

      document.getAnimations().forEach((animation) => {
        let pseudo = animation.effect.pseudoElement;
        if (pseudo == "::view-transition-group(root)") {
          groupAnimationCount++;
        } else if (pseudo == "::view-transition-new(root)") {
          newAnimationCount++;
        } else if (pseudo == "::view-transition-old(root)") {
          oldAnimationCount++;
        } else {
          reject();
        }
      });

      let total =
        groupAnimationCount + oldAnimationCount + newAnimationCount;
      // Old/new images have 2 animations : opacity and mix-blend-mode.
      if (total == 5) {
        assert_equals(groupAnimationCount, 1);
        assert_equals(oldAnimationCount, 2);
        assert_equals(newAnimationCount, 2);
        resolve();
      } else {
        reject();
      }
    });
  });
}, "incorrect UA animations for root transition");
</script>
chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/group-animation-for-root-transition.html
