subresource-filter-disallowed.https.html

<!DOCTYPE html>
<meta charset="utf-8"/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="/webtransport/resources/webtransport-test-helpers.sub.js"></script>
<script>
if (window.testRunner) {
  testRunner.setDisallowedSubresourcePathSuffixes(
      ['headers.py'], true /* block_subresources */);
}

promise_test(async t => {
  const wt =
      new WebTransport(webtransport_url('custom-response.py?:status=200'));
  await wt.ready;
}, 'WebTransport session is established with status code 200');

promise_test(async t => {
  const wt =
      new WebTransport(webtransport_url('echo-request-headers.py'));
  return promise_rejects_dom(t, 'NetworkError', wt.ready);
}, 'Request suffixed with "headers.py" should be blocked.');
</script>

chromium/third_party/blink/web_tests/wpt_internal/webtransport/subresource-filter-disallowed.https.html