1 files changed, 27 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fenced-frame/resources/client-hints-inner.sub.https.html b/testing/web-platform/tests/fenced-frame/resources/client-hints-inner.sub.https.html
new file mode 100644
index 0000000000..0271d0290d
--- /dev/null
+++ b/testing/web-platform/tests/fenced-frame/resources/client-hints-inner.sub.https.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="utils.js"></script>
+<title>Client Hints Helper</title>
+<body>
+<script type="module">
+const [key] = parseKeylist();
+let iframe = document.createElement('iframe');
+let p = new Promise((resolve, reject) => {
+  window.addEventListener('message', e => {
+    resolve(e.data);
+  });
+});
+iframe.src = 'client-hints-iframe-inner.sub.https.html';
+document.body.appendChild(iframe);
+const response = await p;
+const result = {
+  'root-fenced-frame-headers': {
+    'sec-ch-viewport-width': '{{header_or_default(sec-ch-viewport-width, )}}',
+    'sec-ch-ua-reduced': '{{header_or_default(sec-ch-ua-reduced, )}}',
+    'sec-ch-ua-mobile': '{{header_or_default(sec-ch-ua-mobile, )}}',
+  },
+  'iframe-headers': response.headers,
+};
+writeValueToServer(key, JSON.stringify(result));
+</script>
+</body>