--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/test/script/basic/assign_builtin_func_props.js	Fri Feb 15 18:30:19 2013 +0530
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+/**
+ * Check that we can assign to all properties from builtin functions and their
+ * prototypes. This is to make sure all such properties are writable.
+ *
+ * @test
+ * @run
+ */
+
+(function() {
+    var PropNamesGetter = Object.getOwnPropertyNames;
+    var ObjectType = Object;
+
+    function assignAll(obj) {
+        if (! (obj instanceof ObjectType)) {
+            return;
+        }
+        var props = PropNamesGetter(obj);
+        for (var p in props) {
+            var value = obj[props[p]];
+            obj[props[p]] = value;
+        }
+    }
+
+    var globalProps = PropNamesGetter(this);
+    for (var i in globalProps) {
+        var prop = globalProps[i];
+        if (typeof this[prop] == 'function') {
+            assignAll(this[prop].prototype);
+            assignAll(this[prop]);
+        }
+    }
+})();