The Gilded Rose Kata

20th of February, 2014

Introduction

The Gilded Rose is a small inn with a prime location in a prominent city run by a friendly innkeeper named Allison.

It buys and sells only the finest goods. Unfortunately, the goods are constantly degrading in quality as they approach their sell by date. We have a system in place that updates our inventory for us. It was developed by a no-nonsense type named Leeroy, who has moved on to new adventures.

Your task is to add a new feature to our system so we can sell a new category of items. First, an introduction to our system...

Current System Behavior...

• All items have a SellIn value which denotes the number of days we have to sell the item
• All items have a Quality value which denotes how valuable the item is

Current System Behavior...

• At the end of each day our system lowers both values for every item
• Once the sell by date has passed, Quality degrades twice as fast
• The Quality of an item is never negative

Current System Behavior...

• “Aged Brie” actually increases in Quality the older it gets
• The Quality of an item is never more than 50
• “Sulfuras”, being a legendary item, never has to be sold or decreases in Quality
• “Backstage passes”, like aged brie, increases in Quality as it’s SellIn value approaches;

New Requirements

“Conjured” items degrade in Quality twice as fast as normal items

Restrictions

Feel free to make any changes to the UpdateQuality method and add any new code as long as everything still works correctly.

However, do not alter the Item class or Items property as those belong to the goblin in the corner who will insta-rage and one-shot you as he doesn’t believe in shared code ownership (you can make the UpdateQuality method and Items property static if you like, we’ll cover for you).

Add repository!