speculation-rules/prerender/resources/web-nfc.https.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<script src="/speculation-rules/prerender/resources/deferred-promise-utils.js"></script>
<script>

const params = new URLSearchParams(location.search);

// The main test page (restriction-web-nfc.https.html) loads the initiator page,
// then the initiator page will prerender itself with the `prerendering`
// parameter.
const isPrerendering = params.has('prerendering');

if (!isPrerendering) {
  loadInitiatorPage();
} else {
  const prerenderEventCollector = new PrerenderEventCollector();
  const promise = new Promise(async (resolve) => {
    // We expect an error from NDEFReader.write() and scan() since we don't
    // enable NFC HW.
    const ndef = new NDEFReader();
    const result1 = await ndef.write("Test")
      .then(() => 'ndef.write() unexpectedly succeeded')
      .catch(e => 'ndef.write() failed');
    prerenderEventCollector.addEvent(result1);
    const result2 = await ndef.scan()
      .then(() => 'ndef.scan() unexpectedly succeeded')
      .catch(e => 'ndef.scan() failed');
    prerenderEventCollector.addEvent(result2);
    resolve();
  });
  prerenderEventCollector.start(promise, 'NDEFReader.[write|scan]');
}

</script>