1 files changed, 23 insertions, 0 deletions
diff --git a/testing/web-platform/tests/signed-exchange/resources/register-sw-after-fallback.html b/testing/web-platform/tests/signed-exchange/resources/register-sw-after-fallback.html
new file mode 100644
index 0000000000..2711fc241f
--- /dev/null
+++ b/testing/web-platform/tests/signed-exchange/resources/register-sw-after-fallback.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<script src="sxg-util.js"></script>
+<script>
+window.addEventListener('message', async (event) => {
+  try {
+    const scope = './scope/' + location.href;
+    await registerServiceWorkerAndWaitUntilActivated(
+        './service-worker.js', scope)
+    const iframe = await withIframe(scope, 'inner_iframe');
+    event.data.port.postMessage({
+        location: document.location.href,
+        is_fallback: true,
+        err: undefined,
+        iframe_body: iframe.contentWindow.document.body.innerHTML});
+  } catch (err) {
+    event.data.port.postMessage({
+        location: document.location.href,
+        is_fallback: true,
+        err: err.toString()
+    });
+  }
+}, false);
+</script>