chromium/third_party/blink/web_tests/wpt_internal/prerender/resources/web-auth.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 type="module">

// Access external/wpt/credential-management/support/otpcredential-helper.js in
// order to test navigator.credentials.get() which needs to use a mock
// OTPRequest.
import {Status, expectOTPRequest} from
    '/credential-management/support/otpcredential-helper.js';

const params = new URLSearchParams(location.search);

// The main test page (restriction-web-auth.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, reject) => {
    await expectOTPRequest().andReturn(
        () => ({status: Status.SUCCESS, otp: "ABC123"}));
    const sms = await navigator.credentials.get({otp: {transport: ["sms"]}});
    prerenderEventCollector.addEvent(`SMS Code: ${sms.code}`);
    resolve();
  });
  prerenderEventCollector.start(promise, 'navigator.credentials.get');
}

</script>