var SECTION = "proto_10";
var VERSION = "JS1_3";
var TITLE = "Determining Instance Relationships";
startTest();
writeHeaderToLog( SECTION + " "+ TITLE);
var testcases = new Array();
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();
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 pat = new Engineer()
testcases[tc++] = new TestCase( SECTION,
"pat.__proto__ == Engineer.prototype",
true,
pat.__proto__ == Engineer.prototype );
testcases[tc++] = new TestCase( SECTION,
"pat.__proto__.__proto__ == WorkerBee.prototype",
true,
pat.__proto__.__proto__ == WorkerBee.prototype );
testcases[tc++] = new TestCase( SECTION,
"pat.__proto__.__proto__.__proto__ == Employee.prototype",
true,
pat.__proto__.__proto__.__proto__ == Employee.prototype );
testcases[tc++] = new TestCase( SECTION,
"pat.__proto__.__proto__.__proto__.__proto__ == Object.prototype",
true,
pat.__proto__.__proto__.__proto__.__proto__ == Object.prototype );
testcases[tc++] = new TestCase( SECTION,
"pat.__proto__.__proto__.__proto__.__proto__.__proto__ == null",
true,
pat.__proto__.__proto__.__proto__.__proto__.__proto__ == null );
testcases[tc++] = new TestCase( SECTION,
"InstanceOf( pat, Engineer )",
true,
InstanceOf( pat, Engineer ) );
testcases[tc++] = new TestCase( SECTION,
"InstanceOf( pat, WorkerBee )",
true,
InstanceOf( pat, WorkerBee ) );
testcases[tc++] = new TestCase( SECTION,
"InstanceOf( pat, Employee )",
true,
InstanceOf( pat, Employee ) );
testcases[tc++] = new TestCase( SECTION,
"InstanceOf( pat, Object )",
true,
InstanceOf( pat, Object ) );
testcases[tc++] = new TestCase( SECTION,
"InstanceOf( pat, SalesPerson )",
false,
InstanceOf ( pat, SalesPerson ) );
test();