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41 File Name: proto_10.js
43 Description: Determining Instance Relationships
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 Author: christine@netscape.com
54 Date: 12 november 1997
57 var SECTION = "proto_10";
58 var VERSION = "JS1_3";
59 var TITLE = "Determining Instance Relationships";
62 writeHeaderToLog( SECTION + " "+ TITLE);
64 function InstanceOf( object, constructor ) {
65 return object instanceof constructor;
67 function Employee ( name, dept ) {
68 this.name = name || "";
69 this.dept = dept || "general";
75 Manager.prototype = new Employee();
77 function WorkerBee ( name, dept, projs ) {
79 this.base( name, dept)
80 this.projects = projs || new Array();
82 WorkerBee.prototype = new Employee();
84 function SalesPerson () {
88 SalesPerson.prototype = new WorkerBee();
90 function Engineer ( name, projs, machine ) {
91 this.base = WorkerBee;
92 this.base( name, "engineering", projs )
93 this.machine = machine || "";
95 Engineer.prototype = new WorkerBee();
97 var pat = new Engineer();
99 new TestCase( SECTION,
100 "InstanceOf( pat, Engineer )",
102 InstanceOf( pat, Engineer ) );
104 new TestCase( SECTION,
105 "InstanceOf( pat, WorkerBee )",
107 InstanceOf( pat, WorkerBee ) );
109 new TestCase( SECTION,
110 "InstanceOf( pat, Employee )",
112 InstanceOf( pat, Employee ) );
114 new TestCase( SECTION,
115 "InstanceOf( pat, Object )",
117 InstanceOf( pat, Object ) );
119 new TestCase( SECTION,
120 "InstanceOf( pat, SalesPerson )",
122 InstanceOf ( pat, SalesPerson ) );