cache-revalidation.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:
- /client-hints/accept-ch/cache-revalidation.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Tests Stale While Revalidate is not executed for fetch API</title>

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

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

<script src="/client-hints/resources/export.js"></script>

<script src="/common/utils.js"></script>

<script>

function wait25ms(test) {

  return new Promise(resolve => {

    test.step_timeout(() => {

      resolve();

    }, 25);

});

promise_test(async (test) => {

  var request_token = token();

  const response = await fetch(`/client-hints/resources/stale-echo-client-hints.py?token=` + request_token);

  const response2 = await fetch(`/client-hints/resources/stale-echo-client-hints.py?token=` + request_token);

  assert_equals(response.headers.get('Unique-Id'), response2.headers.get('Unique-Id'));

  while(true) {

    const revalidation_check = await fetch(`/client-hints/resources/stale-echo-client-hints.py?query&token=` + request_token);

    if (revalidation_check.headers.get('Count') == '2') {

      client_hints_full_list.forEach(header => {

        assert_equals(revalidation_check.headers.get(header+"-recieved"), revalidation_check.headers.get(header+"-previous"));

});

      break;

    await wait25ms(test);

}, 'Same headers sent for revalidation request');

</script>