proto_4.js   [plain text]

/* The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Mozilla Communicator client code, released March
 * 31, 1998.
 *
 * The Initial Developer of the Original Code is Netscape Communications
 * Corporation. Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 * 
 */
/**
    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);

    var testcases = new Array();

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();

function test() {
    for ( tc=0; tc < testcases.length; tc++ ) {
        testcases[tc].passed = writeTestCaseResult(
                            testcases[tc].expect,
                            testcases[tc].actual,
                            testcases[tc].description +" = "+
                            testcases[tc].actual );

        testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
    }
    stopTest();
    return ( testcases );
}

    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();


    testcases[tc++] = new TestCase( SECTION,
                                    "jim = new Employee(); jim.specialty",
                                    "none",
                                    jim.specialty );

    testcases[tc++] = new TestCase( SECTION,
                                    "terry = new Engineer(); terry.specialty",
                                    "code",
                                    terry.specialty );

    testcases[tc++] = new TestCase( SECTION,
                                    "sean = new SalesPerson(); sean.specialty",
                                    "none",
                                    sean.specialty );

    testcases[tc++] = new TestCase( SECTION,
                                    "wally = new Manager(); wally.specialty",
                                    "none",
                                    wally.specialty );

    testcases[tc++] = new TestCase( SECTION,
                                    "furry = new Manager(); furry.specialty",
                                    "none",
                                    furry.specialty );

    testcases[tc++] = new TestCase( SECTION,
                                    "pat = new Employee(); pat.specialty",
                                    "none",
                                    pat.specialty );

    testcases[tc++] = new TestCase( SECTION,
                                    "leslie = new Engineer(); leslie.specialty",
                                    "code",
                                    leslie.specialty );

    testcases[tc++] = new TestCase( SECTION,
                                    "bubbles = new SalesPerson(); bubbles.specialty",
                                    "none",
                                    bubbles.specialty );


    testcases[tc++] = new TestCase( SECTION,
                                    "chris = new Employee(); chris.specialty",
                                    "code",
                                    chris.specialty );
    test();