Create-url-with-windows-1252-encoding.html

<!doctype html>
<meta charset=windows-1252>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
test(() => {
  const url = new URL("/", location);
  url.protocol = "ws";
  const input = "?\u20AC";
  const expected = url.href + "?%E2%82%AC";

  let ws = new WebSocket(url.href + input);
  assert_equals(ws.url, expected);
  ws.close();

  ws = new WebSocket("/" + input);
  assert_equals(ws.url, expected);
  ws.close();
}, "URL's percent-encoding is always in UTF-8 for WebSocket");
</script>

chromium/third_party/blink/web_tests/external/wpt/websockets/Create-url-with-windows-1252-encoding.html