src/third_party/web_platform_tests/encoding/gb18030-encoder.html

<!doctype html>
<meta charset=gb18030> <!-- if the server overrides this, it is stupid, as this is a testsuite -->
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<script>
 function encode(input, output, desc) {
   test(function() {
     var a = document.createElement("a") // <a> uses document encoding for URL's query
     a.href = "https://example.com/?" + input
     assert_equals(a.search.substr(1), output) // remove leading "?"
   }, "gb18030 encoder: " + desc)
 }

 encode("s", "s", "very basic")
 encode("\u20AC", "%A2%E3", "Euro")
 encode("\u4E02", "%81@", "character")
 encode("\uE4C6", "%A1@", "PUA")
 encode("\uE4C5", "%FE%FE", "PUA #2")
 encode("\ud83d\udca9", "%949%DA3", "poo")
</script>