sxg-sw-register-after-fallback.tentative.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /signed-exchange/service-workers/sxg-sw-register-after-fallback.tentative.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Service worker registration after fallback</title>

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

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

<script src="/common/get-host-info.sub.js"></script>

<script src="../resources/sxg-util.js"></script>

<body>

<script>

promise_test(async (t) => {

  const sxgUrl =

      get_host_info().HTTPS_ORIGIN +

      '/signed-exchange/resources/sxg/register-sw-after-fallback.sxg';

  const message = await openSXGInIframeAndWaitForMessage(t, sxgUrl);

  assert_equals(message.location,

                get_host_info().HTTPS_ORIGIN +

                '/signed-exchange/resources/register-sw-after-fallback.html');

  assert_true(message.is_fallback);

  assert_equals(message.err, undefined);

  assert_equals(message.iframe_body, 'Generated by service worker');

}, 'Service worker registration after fallback');

</script>

</body>