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43 Description: new PrototypeObject
45 This tests Object Hierarchy and Inheritance, as described in the document
46 Object Hierarchy and Inheritance in JavaScript, last modified on 12/18/97
47 15:19:34 on http://devedge.netscape.com/. Current URL:
48 http://devedge.netscape.com/docs/manuals/communicator/jsobj/contents.htm
50 This tests the syntax ObjectName.prototype = new PrototypeObject using the
51 Employee example in the document referenced above.
53 If you add a property to an object in the prototype chain, instances of
54 objects that derive from that prototype should inherit that property, even
55 if they were instatiated after the property was added to the prototype object.
58 Author: christine@netscape.com
59 Date: 12 november 1997
62 var SECTION = "proto_3";
63 var VERSION = "JS1_3";
64 var TITLE = "Adding properties to the prototype";
67 writeHeaderToLog( SECTION + " "+ TITLE);
69 function Employee () {
71 this.dept = "general";
76 Manager.prototype = new Employee();
78 function WorkerBee () {
79 this.projects = new Array();
82 WorkerBee.prototype = new Employee();
84 function SalesPerson () {
88 SalesPerson.prototype = new WorkerBee();
90 function Engineer () {
91 this.dept = "engineering";
94 Engineer.prototype = new WorkerBee();
96 var jim = new Employee();
97 var terry = new Engineer();
98 var sean = new SalesPerson();
99 var wally = new Manager();
101 Employee.prototype.specialty = "none";
103 var pat = new Employee();
104 var leslie = new Engineer();
105 var bubbles = new SalesPerson();
106 var furry = new Manager();
108 Engineer.prototype.specialty = "code";
110 var chris = new Engineer();
113 new TestCase( SECTION,
114 "jim = new Employee(); jim.specialty",
118 new TestCase( SECTION,
119 "terry = new Engineer(); terry.specialty",
123 new TestCase( SECTION,
124 "sean = new SalesPerson(); sean.specialty",
128 new TestCase( SECTION,
129 "wally = new Manager(); wally.specialty",
133 new TestCase( SECTION,
134 "furry = new Manager(); furry.specialty",
138 new TestCase( SECTION,
139 "pat = new Employee(); pat.specialty",
143 new TestCase( SECTION,
144 "leslie = new Engineer(); leslie.specialty",
148 new TestCase( SECTION,
149 "bubbles = new SalesPerson(); bubbles.specialty",
154 new TestCase( SECTION,
155 "chris = new Employee(); chris.specialty",