<DOCTYPE html>
<html>
<body>
<script src="../../../resources/js-test.js"></script>
<script>
description("Tests that setting window.opener to null disown its opener");
jsTestIsAsync = true;

onload = function() {
  if (window.testRunner)
    testRunner.setCanOpenWindows();

  newWindow = open("resources/blank.html");
  newWindow.onload = function() {
    shouldBe("newWindow.opener", "window");

    openerGetter = Object.getOwnPropertyDescriptor(newWindow, "opener").get;

    shouldNotThrow("newWindow.opener = null");
    shouldBeNull("newWindow.opener");
    shouldBeNull("openerGetter.call(newWindow)");

    finishJSTest();
  };
};
</script>
</body>
</html>