testing/web-platform/tests/html/syntax/speculative-charset/speculative-script.tentative.html


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<!DOCTYPE html>
<html>
<head>
<meta charset="windows-1253">
<title>Speculative script</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=/common/utils.js></script>
<body>
<script>
const uuid = token();

window.onmessage = function(e) {
  // The script is first speculatively loaded in the windows-1253 context (inherited from this doc), so
  // the Greek hex NCR turns into a byte. This byte is stored. Then the script is fetched
  // non-speculatively, because the Greek hexNCR in the URL makes the URL not match in the
  // windows-1251 context. Now the Greek hex NCR turns in to a decimal NCR and the original Greek
  // character comes back as a byte that gets a Cyrillic interpretation.
  assert_equals(e.data, `token: ${uuid}, character: &#950;, previous character: \u0436, byte: \u0436`, "Check result");
  done();
}

setup({single_test: true});
const iframe = document.createElement('iframe');
iframe.src = `support/speculative-script.py?uuid=${uuid}`;
document.body.appendChild(iframe);
</script>