chromium/third_party/blink/web_tests/external/wpt/xhr/open-url-encoding.htm

<!DOCTYPE html>
<html>
  <head>
    <meta charset=windows-1252>
    <title>XMLHttpRequest: open() - URL encoding</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
  </head>
  <body>
    <div id="log"></div>
    <script>
      test(function() {
        var client = new XMLHttpRequest()
        client.open("GET", "resources/content.py?\u00DF", false) // This is the German "eszett" character
        client.send()
        assert_equals(client.getResponseHeader("x-request-query"), "%DF")
      }, "percent encode characters");
      test(function() {
        var client = new XMLHttpRequest()
        client.open("GET", "resources/content.py?\uD83D", false)
        client.send()
        assert_equals(client.getResponseHeader("x-request-query"), "%26%2365533%3B");
      }, "lone surrogate");
    </script>
  </body>
</html>