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The Gilded Rose Kata

Setup

This repository includes a problem file and a test file.

  1. Before starting, make sure you have Go installed and configured properly.
  2. To check your work, please execute go test in the terminal in the root directory.

Rules

Hi and welcome to team Gilded Rose. As you know, we are a small inn with a prime location in a prominent city ran by a friendly innkeeper named Allison. We also buy and sell only the finest goods. Unfortunately, our 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 the new feature to our system so that we can begin selling a new category of items.

First, an introduction to our system:

  • 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
  • At the end of each day our system lowers both values for every item

Pretty simple, right? Well, this is where it gets interesting:

  • Once the sell by date has passed, Quality degrades twice as fast
  • The Quality of an item is never negative
  • "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; Quality increases by 2 when there are 10 days or less and by 3 when there are 5 days or less but Quality drops to 0 after the concert

We have recently signed a supplier of conjured items. This requires an update to our system:

"Conjured" items degrade in Quality twice as fast as normal items.

Just for clarification, an item can never have its Quality increase above 50. However, because "Sulfuras" is a legendary item, its Quality starts at 80 and never changes.

Challenge

  1. Refactor the monstrous code in the gildedrose.go class.
  2. Add a new item type, "Conjured". The specs for this item are commented out in the gildedrose_test.go file.