image-sw-same-origin.https.html

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This WPT test may be referenced by the following Test IDs:
- /largest-contentful-paint/image-sw-same-origin.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<meta charset=utf-8>

<title>Largest Contentful Paint: same-origin service worker should not be treated as TAO-fail</title>

<body>

  <script src="/resources/testharness.js"></script>

  <script src="/resources/testharnessreport.js"></script>

  <script src="resources/largest-contentful-paint-helpers.js"></script>

  <script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>

  <script>

    setup(() => {

      assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented");

});

    promise_test(async t => {

      const scope = "resources/lcp-sw.https.html";

      const registration =

          await service_worker_unregister_and_register(t, "resources/lcp-sw-from-cache.js", "resources/");

      await wait_for_state(t, registration.installing, "activated");

      t.add_cleanup(() => registration.unregister());

      const iframe = document.createElement("iframe");

      iframe.src = scope;

      document.body.appendChild(iframe);

      t.add_cleanup(() => iframe.remove());

      const entry = await new Promise(resolve => window.addEventListener("message", e => resolve(e.data)));

      assert_equals(entry.id, "theImage");

      assert_not_equals(entry.renderTime, 0);

    }, "Same-origin images served from a service-worker should have a correct renderTime");

</script>

</body>