defineProperty test

Person.js

"use strict";

var Person = function(name){
    var _name = name || "Unknown";
    
    Object.defineProperty(this, "name", {
        get: function(){ return "My name is " + _name; },
        set: function(newvalue){ _name = newvalue; }
    });
    
    Object.defineProperty(this, "location", {
        get: function(){ throw Error("NotImplementException"); },
        configurable: true
    }); 
};

Person.prototype.getBusinessCard = function(){
    return "[Card] " + this.name + " " + this.location;
};  

var Melbourner = function(){
    Person.apply(this, arguments);
    Object.defineProperty(this, "location", {
        get: function(){ return "Melbourne" }
    });
    Object.freeze(this);
};

Melbourner.prototype = Object.create(Person.prototype);

var mindy = new Person('Mindy');
console.log(mindy.name);

try{
    console.log(mindy.location);
} catch(e){
    console.log(e);
}

var edward = new Melbourner('Edward');
console.log(edward.name, edward.location);
console.log(edward.getBusinessCard());