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+/* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 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: instanceof-002.js
+ Section:
+ Description: Determining Instance Relationships
+
+ This test is the same as js1_3/inherit/proto-002, except that it uses
+ the builtin instanceof operator rather than a user-defined function
+ called InstanceOf.
+
+ 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.
+
+ Author: christine@netscape.com
+ Date: 12 november 1997
+*/
+// onerror = err;
+
+var SECTION = "instanceof-002";
+var VERSION = "ECMA_2";
+var TITLE = "Determining Instance Relationships";
+
+startTest();
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+function InstanceOf( object, constructor ) {
+ while ( object != null ) {
+ if ( object == constructor.prototype ) {
+ return true;
+ }
+ object = object.__proto__;
+ }
+ return false;
+}
+
+function Employee ( name, dept ) {
+ this.name = name || "";
+ this.dept = dept || "general";
+}
+
+function Manager () {
+ this.reports = [];
+}
+Manager.prototype = new Employee();
+
+function WorkerBee ( name, dept, projs ) {
+ this.base = Employee;
+ this.base( name, dept)
+ this.projects = projs || new Array();
+}
+WorkerBee.prototype = new Employee();
+
+function SalesPerson () {
+ this.dept = "sales";
+ this.quota = 100;
+}
+SalesPerson.prototype = new WorkerBee();
+
+function Engineer ( name, projs, machine ) {
+ this.base = WorkerBee;
+ this.base( name, "engineering", projs )
+ this.machine = machine || "";
+}
+Engineer.prototype = new WorkerBee();
+
+var pat = new Engineer();
+
+new TestCase( SECTION,
+ "pat.__proto__ == Engineer.prototype",
+ true,
+ pat.__proto__ == Engineer.prototype );
+
+new TestCase( SECTION,
+ "pat.__proto__.__proto__ == WorkerBee.prototype",
+ true,
+ pat.__proto__.__proto__ == WorkerBee.prototype );
+
+new TestCase( SECTION,
+ "pat.__proto__.__proto__.__proto__ == Employee.prototype",
+ true,
+ pat.__proto__.__proto__.__proto__ == Employee.prototype );
+
+new TestCase( SECTION,
+ "pat.__proto__.__proto__.__proto__.__proto__ == Object.prototype",
+ true,
+ pat.__proto__.__proto__.__proto__.__proto__ == Object.prototype );
+
+new TestCase( SECTION,
+ "pat.__proto__.__proto__.__proto__.__proto__.__proto__ == null",
+ true,
+ pat.__proto__.__proto__.__proto__.__proto__.__proto__ == null );
+
+new TestCase( SECTION,
+ "pat instanceof Engineer",
+ true,
+ pat instanceof Engineer );
+
+new TestCase( SECTION,
+ "pat instanceof WorkerBee )",
+ true,
+ pat instanceof WorkerBee );
+
+new TestCase( SECTION,
+ "pat instanceof Employee )",
+ true,
+ pat instanceof Employee );
+
+new TestCase( SECTION,
+ "pat instanceof Object )",
+ true,
+ pat instanceof Object );
+
+new TestCase( SECTION,
+ "pat instanceof SalesPerson )",
+ false,
+ pat instanceof SalesPerson );
+test();