<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>Test DOMLocalization's MutationObserver</title>
  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
  <script type="application/javascript">
  "use strict";
  const l10nReg = new L10nRegistry();
  const fs = [
    { path: "/localization/en-US/mock.ftl", source: `
title = Hello World
title2 = Hello Another World
` },
  ];
  const source = L10nFileSource.createMock("test", "app", ["en-US"], "/localization/{locale}", fs);
  l10nReg.registerSources([source]);

  window.onload = async function() {
    SimpleTest.waitForExplicitFinish();

    const domLoc = new DOMLocalization(
      [],
      false,
      l10nReg,
      ["en-US"],
    );

    const h1 = document.querySelectorAll("h1")[0];

    domLoc.addResourceIds(["/mock.ftl"]);
    domLoc.connectRoot(document.body);

    await domLoc.translateRoots();

    is(h1.textContent, "Hello World");


    const mo = new MutationObserver(function onMutations(mutations) {
      is(h1.textContent, "Hello Another World");
      mo.disconnect();
      SimpleTest.finish();
    });

    mo.observe(h1, { childList: true, characterData: true });

    domLoc.setAttributes(h1, "title2");
  };
  </script>
</head>
<body>
  <div>
    <h1 data-l10n-id="title"></h1>
  </div>
</body>
</html>
