<DOCTYPE html>
<html>
<body>
<script src="../../../resources/js-test.js"></script>
<script>
description("Tests shadowing of window.opener property");

shouldBeNull("window.opener");
evalAndLog("desc = Object.getOwnPropertyDescriptor(window, 'opener')");
shouldBeType("desc.get", "Function");
shouldBeType("desc.set", "Function");
shouldBeTrue("desc.enumerable");
shouldBeTrue("desc.configurable");

openerGetter = desc.get;

shouldNotThrow("window.opener = 'foo'");
shouldBeEqualToString("window.opener", "foo");

evalAndLog("desc = Object.getOwnPropertyDescriptor(window, 'opener')");
shouldBeEqualToString("desc.value", "foo");
shouldBeTrue("desc.writable");
shouldBeTrue("desc.enumerable");
shouldBeTrue("desc.configurable");

shouldBeNull("openerGetter.call(window)");

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

evalAndLog("desc = Object.getOwnPropertyDescriptor(window, 'opener')");
shouldBe("desc.value", "null");
shouldBeTrue("desc.writable");
shouldBeTrue("desc.enumerable");
shouldBeTrue("desc.configurable");

shouldNotThrow("delete window.opener");
shouldBeUndefined("window.opener");

shouldBeNull("openerGetter.call(window)");

evalAndLog("desc = Object.getOwnPropertyDescriptor(window, 'opener')");
shouldBeUndefined("desc");
</script>
</body>
</html>