GildedRose-Refactoring-Kata/GildedRose/js/README.md

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If you want to get cracking on the JavaScript source then do this:
git clone git@github.com:guyroyse/gilded-rose-javascript.git
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 *sell_in* 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_in* days is less then zero, *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 nor does it
decrease in *quality*
- "Backstage passes", like aged brie, increases in *quality* as it's *sell_in*
value decreases; *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 *update_quality* 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.
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.
Sources:
<http://www.iamnotmyself.com/2011/02/13/RefactorThisTheGildedRoseKata.aspx>
<https://github.com/professor/GildedRose>