top-bit-set-header.html | Explore in Territory

<!DOCTYPE html>
<meta charset="utf-8">
<title>XMLHttpRequest top-bit-set header</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async_test(function(t) {
  var xhr = new XMLHttpRequest();
  xhr.open('GET', 'resources/top-bit-set-header.php');
  xhr.onload = t.step_func(function() {
    assert_equals(
        xhr.getResponseHeader('X-Custom-Header-Bytes'),
        '\x80\xA0\xFF', 'header value should match expectation');
    t.done();
  });
  xhr.send();
}, 'top-bit-set bytes in HTTP response headers should be treated as Unicode ' +
    'code points');
</script>

chromium/third_party/blink/web_tests/http/tests/xmlhttprequest/top-bit-set-header.html