1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/resize-observer/calculate-depth-for-node.html b/testing/web-platform/tests/resize-observer/calculate-depth-for-node.html
new file mode 100644
index 0000000000..339e52bb79
--- /dev/null
+++ b/testing/web-platform/tests/resize-observer/calculate-depth-for-node.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://drafts.csswg.org/resize-observer/#calculate-depth-for-node">
+<body>
+<div id="host"></div>
+<script>
+let didSeeError = false;
+window.onerror = (message, source, lineno, colno, error) => {
+  didSeeError = true;
+}
+
+async_test(t => {
+  let host = document.querySelector('#host');
+  let observer = new ResizeObserver(t.step_func(() => {
+    let root = host.attachShadow({mode:'open'});
+    let child = root.appendChild(document.createElement('div'));
+    new ResizeObserver(() => {}).observe(child);
+    requestAnimationFrame(t.step_func_done(() => { assert_false(didSeeError); }));
+  }));
+  observer.observe(host);
+}, '"Calculate depth for node" algorithm with Shadow DOM');
+
+
+</script>
+</body>