bidirectional-cancel-crash.https.html

<!DOCTYPE html>
<meta charset="utf-8">
<html class="test-wait">
<script src="/common/get-host-info.sub.js"></script>
<script src="resources/webtransport-test-helpers.sub.js"></script>
<script type="module">
  const WT_CODE = 127;
  const HTTP_CODE = webtransport_code_to_http_code(WT_CODE);
  const wt = new WebTransport(
    webtransport_url(`abort-stream-from-server.py?code=${HTTP_CODE}`));
  await wt.ready;

  const bidi = await wt.createBidirectionalStream();
  const writer = bidi.writable.getWriter();

  const reader = bidi.readable.getReader();
  reader.read();

  // Write something, to make the stream visible to the server side.
  await writer.write(new Uint8Array([64]));

  const e = await reader.closed.catch(e => e);
  document.documentElement.classList.remove("test-wait");
</script>

chromium/third_party/blink/web_tests/external/wpt/webtransport/bidirectional-cancel-crash.https.html