1 files changed, 56 insertions, 0 deletions
diff --git a/testing/web-platform/tests/speculation-rules/prerender/restriction-service-worker-update.https.html b/testing/web-platform/tests/speculation-rules/prerender/restriction-service-worker-update.https.html
new file mode 100644
index 0000000000..92c16e5433
--- /dev/null
+++ b/testing/web-platform/tests/speculation-rules/prerender/restriction-service-worker-update.https.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<title>ServiceWorkerRegistration.update in a prerendered page</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>
+<script src="/speculation-rules/prerender/resources/utils.js"></script>
+<body>
+<script>
+
+setup(() => assertSpeculationRulesIsSupported());
+
+const uid = token();
+
+const PAGE_URL = `resources/service-worker-update.html?uid=${uid}`;
+const WORKER_URL = 'resources/do-nothing-worker.js';
+
+promise_test(async t => {
+  const registration =
+      await navigator.serviceWorker.register(WORKER_URL, {scope: PAGE_URL});
+  t.add_cleanup(_ => registration.unregister());
+
+  const bc = new PrerenderChannel('test-channel', uid);
+  t.add_cleanup(_ => bc.close());
+
+  const gotMessage = new Promise(resolve => {
+    bc.addEventListener('message', e => {
+      resolve(e.data);
+    }, {
+      once: true
+    });
+  });
+  window.open(PAGE_URL, '_blank', 'noopener');
+
+  const result = await gotMessage;
+  const expected = [
+    {event: 'started waiting ServiceWorkerRegistration.update',  prerendering: true},
+    {event: 'prerendering change',                               prerendering: false},
+    {event: 'service worker updated',                            prerendering: false},
+    {event: 'finished waiting ServiceWorkerRegistration.update', prerendering: false},
+  ];
+  assert_equals(result.length, expected.length);
+  for (let i = 0; i < result.length; i++) {
+    assert_equals(result[i].event, expected[i].event, `event[${i}]`);
+    assert_equals(result[i].prerendering, expected[i].prerendering,
+      `prerendering[${i}]`);
+  }
+
+  // Send a close signal to PrerenderEventCollector on the prerendered page.
+  new PrerenderChannel('close', uid).postMessage('');
+}, 'ServiceWorkerRegistration.update() should be deferred in a prerendered ' +
+   'page');
+
+</script>
+</body>