Guilded Rose Kata

Designed to practice refactoring legacy code and writing tests.

Originally created by Terry Hughes Translated to Ruby by Emily Bache

View original code base here.

View full requirements here.

To run tests:

bundle install
rspec

Summary of requirements

Task:

Add new feature to system for new category of item.

Basic 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

Additional features:

- 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 its 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

New requirement:

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

Kata restrictions:

Only allowed to edit the UpdateQuality method, not the Item class or Items property.