<!DOCTYPE HTML>
<html>
  <head>
    <title>Bug 1121857 - document.baseURI should not get blocked if baseURI is null</title>
  </head>
  <body>
  <script type="text/javascript">
    // check the initial base-uri
    window.parent.postMessage({baseURI: document.baseURI, test: "initial_base_uri"}, "*");

    // append a child and check the base-uri
    var baseTag = document.head.appendChild(document.createElement('base'));
    baseTag.href = 'http://www.base-tag.com';
    window.parent.postMessage({baseURI: document.baseURI, test: "changed_base_uri"}, "*");

    // remove the child and check that the base-uri is back to the initial one
    document.head.remove(baseTag);
    window.parent.postMessage({baseURI: document.baseURI, test: "initial_base_uri"}, "*");
  </script>
</body>
</html>
