1 files changed, 54 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-view-transitions/class-specificity.html b/testing/web-platform/tests/css/css-view-transitions/class-specificity.html
new file mode 100644
index 0000000000..55de2ec388
--- /dev/null
+++ b/testing/web-platform/tests/css/css-view-transitions/class-specificity.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: class specificity</title>
+<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
+<link rel="author" href="mailto:vmpstr@chromium.org">
+<link rel="match" href="class-specificity-ref.html">
+<script src="/common/reftest-wait.js"></script>
+<style>
+#shared {
+  contain: paint;
+  width: 100px;
+  height: 100px;
+  background: blue;
+  view-transition-name: shared;
+  view-transition-class: sharedclass1 sharedclass2;
+}
+
+/* We're verifying what we capture, so just display the old contents for 5 minutes.  */
+html::view-transition { background: pink; }
+html::view-transition-group(shared) { animation-duration: 300s; }
+
+html::view-transition-old(shared) {
+  animation: unset;
+  opacity: 1;
+  border: 10px solid red;
+}
+html::view-transition-old(*.sharedclass1.sharedclass2) {
+  border: 10px solid yellow;
+}
+
+html::view-transition-old(*.sharedclass1) {
+  border: 10px solid green;
+}
+
+html::view-transition-old(*) {
+  border: 10px solid orange;
+}
+
+html::view-transition-new(shared) { animation: unset; opacity: 0; }
+
+html::view-transition-old(root) { animation: unset; opacity: 0; }
+html::view-transition-new(root) { animation: unset; opacity: 0 }
+</style>
+<div id=shared></div>
+<script>
+failIfNot(document.startViewTransition, "Missing document.startViewTransition");
+
+async function runTest() {
+  document.startViewTransition(() => {
+    requestAnimationFrame(() => requestAnimationFrame(takeScreenshot));
+  });
+}
+onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
+</script>