This Kata is a Kotlin-port from Emilie Bache's Github Repository.
The Kata was originally created by Terry Hughes (http://twitter.com/#!/TerryHughes). It is already on GitHub here. See also Bobby Johnson's description of the kata.
To build the project and run the test on the command line, use ./gradlew build.
The tests from GildedRoseTest are taken from
this Gist.
You might want to delete these test and write the for yourself based on the requirements befor you start with the refactoring.
The GildedRoseTextTest is inspired
by text-based approval testing. This test does not reveal
any domain logic but does provide 100% coverage. You can use this test as a safty net and try to
discover the domain logic only by applying structural refactorings.
These requirements are taken from Emilie Bache's Github Repository .
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 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
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
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.)
Just for clarification, an item can never have its Quality increase above 50, however "Sulfuras" is a legendary item and as such its Quality is 80 and it never alters.