<!doctype html>
<meta charset="utf-8">
<title>window.top</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
test(function() {
  assert_equals(window, top)
}, "Top level browsing context");

function step_func(test) {
  return function (top_pointer) {
    test.step(function() {assert_equals(top_pointer, window);})
    test.done();
  }
}

var t1 = async_test("One nested iframe");
t1.step(function() {
  var iframe = document.createElement("iframe");
  //iframe.src = "data:text/html,"

  iframe.onload = t1.step_func(
    function() {
      var doc = iframe.contentDocument;
      iframe.contentWindow.test_func = step_func(t1);

      var script = doc.createElement("script")
      script.textContent = "test_func(top);"
      doc.body.appendChild(script);
    });
    document.body.appendChild(iframe);
});

var t2 = async_test("Two nested iframes");
t2.step(function() {
  var iframe = document.createElement("iframe");
  //iframe.src = "data:text/html,"

  iframe.onload = t2.step_func(
    function() {
      var doc = iframe.contentDocument;
      iframe2 = document.createElement("iframe");
      //iframe2.src = "data:text/html,"

      iframe2.onload = t2.step_func(
        function() {
          var doc2 = iframe2.contentDocument;

          iframe2.contentWindow.test_func = step_func(t2);

          var script = doc2.createElement("script")
          script.textContent = "test_func(top);"
          doc2.body.appendChild(script);
        });
      doc.body.appendChild(iframe2);
   });

  document.body.appendChild(iframe);
});

</script>