diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_3/inherit/proto_4.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_3/inherit/proto_4.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,125 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+/**
+   File Name:          proto_4.js
+   Section:
+   Description:        new PrototypeObject
+
+   This tests Object Hierarchy and Inheritance, as described in the document
+   Object Hierarchy and Inheritance in JavaScript, last modified on 12/18/97
+   15:19:34 on http://devedge.netscape.com/.  Current URL:
+   http://devedge.netscape.com/docs/manuals/communicator/jsobj/contents.htm
+
+   This tests the syntax ObjectName.prototype = new PrototypeObject using the
+   Employee example in the document referenced above.
+
+   If you add a property to an object in the prototype chain, instances of
+   objects that derive from that prototype should inherit that property, even
+   if they were instatiated after the property was added to the prototype object.
+
+
+   Author:             christine@netscape.com
+   Date:               12 november 1997
+*/
+
+var SECTION = "proto_3";
+var VERSION = "JS1_3";
+var TITLE   = "Adding properties to the prototype";
+
+startTest();
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+function Employee () {
+  this.name = "";
+  this.dept = "general";
+}
+function Manager () {
+  this.reports = [];
+}
+Manager.prototype = new Employee();
+
+function WorkerBee () {
+  this.projects = new Array();
+}
+
+WorkerBee.prototype = new Employee();
+
+function SalesPerson () {
+  this.dept = "sales";
+  this.quota = 100;
+}
+SalesPerson.prototype = new WorkerBee();
+
+function Engineer () {
+  this.dept = "engineering";
+  this.machine = "";
+}
+Engineer.prototype = new WorkerBee();
+
+var jim = new Employee();
+var terry = new Engineer();
+var sean = new SalesPerson();
+var wally = new Manager();
+
+Employee.prototype.specialty = "none";
+
+var pat = new Employee();
+var leslie = new Engineer();
+var bubbles = new SalesPerson();
+var furry = new Manager();
+
+Engineer.prototype.specialty = "code";
+
+var chris = new Engineer();
+
+
+new TestCase( SECTION,
+	      "jim = new Employee(); jim.specialty",
+	      "none",
+	      jim.specialty );
+
+new TestCase( SECTION,
+	      "terry = new Engineer(); terry.specialty",
+	      "code",
+	      terry.specialty );
+
+new TestCase( SECTION,
+	      "sean = new SalesPerson(); sean.specialty",
+	      "none",
+	      sean.specialty );
+
+new TestCase( SECTION,
+	      "wally = new Manager(); wally.specialty",
+	      "none",
+	      wally.specialty );
+
+new TestCase( SECTION,
+	      "furry = new Manager(); furry.specialty",
+	      "none",
+	      furry.specialty );
+
+new TestCase( SECTION,
+	      "pat = new Employee(); pat.specialty",
+	      "none",
+	      pat.specialty );
+
+new TestCase( SECTION,
+	      "leslie = new Engineer(); leslie.specialty",
+	      "code",
+	      leslie.specialty );
+
+new TestCase( SECTION,
+	      "bubbles = new SalesPerson(); bubbles.specialty",
+	      "none",
+	      bubbles.specialty );
+
+
+new TestCase( SECTION,
+	      "chris = new Employee(); chris.specialty",
+	      "code",
+	      chris.specialty );
+test();