1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/preventExtensions/15.2.3.10-3-15.js b/js/src/tests/test262/built-ins/Object/preventExtensions/15.2.3.10-3-15.js
new file mode 100644
index 0000000000..61ebf986b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/preventExtensions/15.2.3.10-3-15.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.10-3-15
+description: >
+    Object.preventExtensions - named properties cannot be added into a
+    String object
+includes: [propertyHelper.js]
+---*/
+
+var obj = new String("bbq");
+
+assert(Object.isExtensible(obj));
+Object.preventExtensions(obj);
+assert(!Object.isExtensible(obj));
+
+verifyNotWritable(obj, "exName", "nocheck");
+
+assert(!obj.hasOwnProperty("exName"));
+
+reportCompare(0, 0);