mime-sniffing.https.html | Explore in Territory

<!DOCTYPE html>
<title>Service Worker: MIME sniffing</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/test-helpers.sub.js"></script>
<script>
promise_test(t => {
    const SCOPE = 'resources/blank.html?mime-sniffing';
    const SCRIPT = 'resources/mime-sniffing-worker.js';
    return service_worker_unregister_and_register(t, SCRIPT, SCOPE)
      .then(registration => {
          add_completion_callback(() => registration.unregister());
          return wait_for_state(t, registration.installing, 'activated');
        })
      .then(_ => with_iframe(SCOPE))
      .then(frame => {
          add_completion_callback(() => frame.remove());
          assert_equals(frame.contentWindow.document.body.innerText, 'test');
          const h1 = frame.contentWindow.document.getElementById('testid');
          assert_equals(h1.innerText,'test');
        });
  }, 'The response from service worker should be correctly MIME siniffed.');
</script>

chromium/third_party/blink/web_tests/external/wpt/service-workers/service-worker/mime-sniffing.https.html