--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/test/script/basic/NASHORN-398.js	Fri Dec 21 16:36:24 2012 -0400
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2010, 2012, 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.
+ */
+
+/**
+ * NASHORN-398 : Should not be able to set non-existing indexed property if object is not extensible
+ *
+ * @test
+ * @run
+ */
+
+function funcNonStrict(array) {
+    var obj = array? [] : {};
+    Object.preventExtensions(obj);
+    obj[0] = 12;
+    if (obj[0] === 12) {
+        fail("#1 obj[0] has been set");
+    }
+
+    if (obj.hasOwnProperty("0")) {
+        fail("#2 has property '0'");
+    }
+}
+
+funcNonStrict(true);
+funcNonStrict(false);
+
+function funcStrict(array) {
+    'use strict';
+
+    var obj = array? [] : {};
+    Object.preventExtensions(obj);
+    try {
+        obj[0] = 12;
+        fail("#3 should have thrown TypeError");
+    } catch (e) {
+        if (! (e instanceof TypeError)) {
+            fail("#4 TypeError expected, got " + e);
+        }
+    }
+
+    if (obj[0] === 12) {
+        fail("#5 obj[0] has been set");
+    }
+
+    if (obj.hasOwnProperty("0")) {
+        fail("has property '0'");
+    }
+}
+
+funcStrict(true);
+funcStrict(false);
+