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<!DOCTYPE html>
<html>
  <head>
    <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
    <script>
      function doIs(arg1, arg2, arg3) {
        window.parent.postMessage("t " + encodeURIComponent(arg1) + " " +
                                  encodeURIComponent(arg2) + " " +
                                  encodeURIComponent(arg3), "*");
      }

      function $(arg) { return document.getElementById(arg); }

      window.addEventListener("message",
        function(evt) {
          doIs(evt.data, "start", "Unexpected message");
          $("target").focus();
          sendString("Test");
          var t = $("target");
          doIs(t.value, "Test", "Typing should work");
          (function() {
            SpecialPowers.wrap(t).QueryInterface(SpecialPowers.Ci.nsIDOMNSEditableElement).editor.undo(1);
          })()
          doIs(t.value, "", "Undo should work");
          (function() {
            SpecialPowers.wrap(t).QueryInterface(SpecialPowers.Ci.nsIDOMNSEditableElement).editor.redo(1);
          })()
          doIs(t.value, "Test", "Redo should work");
          window.parent.postMessage("f", "*");
        },
        "false");
      
    </script>
  </head>
  <body>
    <input id="target">
  </body>
</html>