1 files changed, 81 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-view-transitions/content-visibility-auto-shared-element.html b/testing/web-platform/tests/css/css-view-transitions/content-visibility-auto-shared-element.html
new file mode 100644
index 0000000000..b678f485f6
--- /dev/null
+++ b/testing/web-platform/tests/css/css-view-transitions/content-visibility-auto-shared-element.html
@@ -0,0 +1,81 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>Shared transitions: offscreen content with content-visibility auto</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:vmpstr@chromium.org">
+<link rel="match" href="content-visibility-auto-shared-element-ref.html">
+<script src="/common/reftest-wait.js"></script>
+<style>
+body {
+  overflow: hidden;
+}
+.flex {
+  display: flex;
+  flex-direction: row;
+  justify-content: flex-start;
+  align-items: flex-start;
+}
+.box {
+  width: 100px;
+  height: 500px;
+  contain: paint;
+}
+.shared {
+  background: green;
+  border: 1px solid black;
+  box-sizing: border-box;
+}
+.spacer {
+  height: 3000px;
+}
+#hidden {
+  width: 10px;
+  height: 10px;
+  background: red;
+  contain: paint;
+  view-transition-name: hidden;
+}
+.locked {
+  content-visibility: auto;
+  contain-intrinsic-size: 500px;
+}
+
+html::view-transition-group(hidden) { animation-duration: 300s; }
+html::view-transition-image-pair(hidden) { visibility: hidden; }
+
+html::view-transition-group(*) { animation-duration: 0s; }
+html::view-transition-new(*) { animation: unset; opacity: 0; }
+html::view-transition-old(*) { animation: unset; opacity: 1; }
+html::view-transition-group(root) { display: none; }
+html::view-transition { background: pink }
+
+</style>
+
+<div class=flex>
+ <div id=dst1 class=box></div>
+ <div id=dst2 class=box></div>
+ <div id=dst3 class=box></div>
+</div>
+<div id=hidden></div>
+<div class=spacer></div>
+<div id=content>
+ <div id=lockme><div id=src1 class="box shared" style="view-transition-name: one">ancestor c-v</div></div>
+ <div id=src2 class="box shared locked" style="view-transition-name: two">self c-v</div>
+ <div id=src3 class="box shared" style="view-transition-name: three"><div class=locked>descendant c-v</div></div>
+</div>
+
+<script>
+failIfNot(document.startViewTransition, "Missing document.startViewTransition");
+
+async function runTest() {
+  lockme.classList.add("locked");
+  document.startViewTransition(() => {
+    content.remove();
+    dst1.style = "view-transition-name: one";
+    dst2.style = "view-transition-name: two";
+    dst3.style = "view-transition-name: three";
+    requestAnimationFrame(() => requestAnimationFrame(takeScreenshot));
+  });
+}
+onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
+</script>