Node-append-meta-referrer-and-script-from-fragment.tentative.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /dom/nodes/insertion-removing-steps/Node-append-meta-referrer-and-script-from-fragment.tentative.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>Node.appendChild: inserting script and meta-referrer from a div</title>

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<script>

promise_test(async t => {

  const preMetaScript = document.createElement("script");

  preMetaScript.textContent = `

    window.preMetaScriptPromise = fetch('/html/infrastructure/urls/terminology-0/resources/echo-referrer-text.py')

      .then(response => response.text());

`;

  const meta = document.createElement("meta");

  meta.name = "referrer";

  meta.content = "no-referrer";

  const postMetaScript = document.createElement("script");

  postMetaScript.textContent = `

    window.postMetaScriptPromise = fetch('/html/infrastructure/urls/terminology-0/resources/echo-referrer-text.py')

      .then(response => response.text());

`;

  const fragment = new DocumentFragment();

  fragment.append(preMetaScript, meta, postMetaScript);

  document.head.append(fragment);

  const preMetaReferrer = await window.preMetaScriptPromise;

  assert_equals(preMetaReferrer, location.href,

      "preMetaReferrer is the full URL; by the time the first script runs in " +

      "its post-insertion steps, the later-inserted meta tag has not run its " +

      "post-insertion steps, which is where meta tags are processed");

  const postMetaReferrer = await window.postMetaScriptPromise;

  assert_equals(postMetaReferrer, "",

      "postMetaReferrer is empty; by the time the second script runs in " +

      "its post-insertion steps, the later-inserted meta tag has run its " +

      "post-insertion steps, and observes the meta tag's effect");

}, "<meta name=referrer> gets processed and applied in the post-insertion " +

   "steps");

</script>