js/tests/js1_3/inherit/proto_4.js

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  38
  39 gTestfile = 'proto_4.js';
  40
  41 /**
  42    File Name:          proto_4.js
  43    Section:
  44    Description:        new PrototypeObject
  45
  46    This tests Object Hierarchy and Inheritance, as described in the document
  47    Object Hierarchy and Inheritance in JavaScript, last modified on 12/18/97
  48    15:19:34 on http://devedge.netscape.com/.  Current URL:
  49    http://devedge.netscape.com/docs/manuals/communicator/jsobj/contents.htm
  50
  51    This tests the syntax ObjectName.prototype = new PrototypeObject using the
  52    Employee example in the document referenced above.
  53
  54    If you add a property to an object in the prototype chain, instances of
  55    objects that derive from that prototype should inherit that property, even
  56    if they were instatiated after the property was added to the prototype object.
  57
  58
  59    Author:             christine@netscape.com
  60    Date:               12 november 1997
  61 */
  62
  63 var SECTION = "proto_3";
  64 var VERSION = "JS1_3";
  65 var TITLE   = "Adding properties to the prototype";
  66
  67 startTest();
  68 writeHeaderToLog( SECTION + " "+ TITLE);
  69
  70 function Employee () {
  71   this.name = "";
  72   this.dept = "general";
  73 }
  74 function Manager () {
  75   this.reports = [];
  76 }
  77 Manager.prototype = new Employee();
  78
  79 function WorkerBee () {
  80   this.projects = new Array();
  81 }
  82
  83 WorkerBee.prototype = new Employee();
  84
  85 function SalesPerson () {
  86   this.dept = "sales";
  87   this.quota = 100;
  88 }
  89 SalesPerson.prototype = new WorkerBee();
  90
  91 function Engineer () {
  92   this.dept = "engineering";
  93   this.machine = "";
  94 }
  95 Engineer.prototype = new WorkerBee();
  96
  97 var jim = new Employee();
  98 var terry = new Engineer();
  99 var sean = new SalesPerson();
 100 var wally = new Manager();
 101
 102 Employee.prototype.specialty = "none";
 103
 104 var pat = new Employee();
 105 var leslie = new Engineer();
 106 var bubbles = new SalesPerson();
 107 var furry = new Manager();
 108
 109 Engineer.prototype.specialty = "code";
 110
 111 var chris = new Engineer();
 112
 113
 114 new TestCase( SECTION,
 115               "jim = new Employee(); jim.specialty",
 116               "none",
 117               jim.specialty );
 118
 119 new TestCase( SECTION,
 120               "terry = new Engineer(); terry.specialty",
 121               "code",
 122               terry.specialty );
 123
 124 new TestCase( SECTION,
 125               "sean = new SalesPerson(); sean.specialty",
 126               "none",
 127               sean.specialty );
 128
 129 new TestCase( SECTION,
 130               "wally = new Manager(); wally.specialty",
 131               "none",
 132               wally.specialty );
 133
 134 new TestCase( SECTION,
 135               "furry = new Manager(); furry.specialty",
 136               "none",
 137               furry.specialty );
 138
 139 new TestCase( SECTION,
 140               "pat = new Employee(); pat.specialty",
 141               "none",
 142               pat.specialty );
 143
 144 new TestCase( SECTION,
 145               "leslie = new Engineer(); leslie.specialty",
 146               "code",
 147               leslie.specialty );
 148
 149 new TestCase( SECTION,
 150               "bubbles = new SalesPerson(); bubbles.specialty",
 151               "none",
 152               bubbles.specialty );
 153
 154
 155 new TestCase( SECTION,
 156               "chris = new Employee(); chris.specialty",
 157               "code",
 158               chris.specialty );
 159 test();