Modify Decorator code

Author: tcorral

Decorator/Beverage.js

@@ -3,7 +3,7 @@ var Beverage = function()
 	this.sDescription = 'Unknown beverage';
 };
 Beverage.prototype.getDescription = function(){
-	return this.sDescription;
+	throw new Error("This method must be overwritten!");
 };
 Beverage.prototype.cost = function()
 {

Decorator/CondimentDecorator.js

@@ -2,7 +2,4 @@ var CondimentDecorator = function()
 {
 	Beverage.apply(this);
 };
-CondimentDecorator.prototype.getDescription = function()
-{
-	throw new Error("This method must be overwritten!");
-};
+CondimentDecorator.prototype = new Beverage();

Decorator/Expresso.js

@@ -1,7 +1,9 @@
 var Expresso = function()
 {
+	Beverage.apply(this);
 	this.sDescription = 'Expresso';
 };
+Expresso.prototype = new Beverage();
 Expresso.prototype.cost = function()
 {
 	return 1.99;

Decorator/HouseBlend.js

@@ -1,7 +1,9 @@
 var HouseBlend = function()
 {
+	Beverage.apply(this);
 	this.sDescription = 'House Blend coffe';
 };
+HouseBlend.prototype = new Beverage();
 HouseBlend.prototype.cost = function()
 {
 	return 0.89;

Decorator/Mocha.js

@@ -3,6 +3,7 @@ var Mocha = function(oBeverage)
 	CondimentDecorator.apply(this);
 	this.oBeverage = oBeverage;
 };
+Mocha.prototype = new CondimentDecorator();
 Mocha.prototype.getDescription = function()
 {
 	return this.oBeverage.getDescription() + ", Mocha";