Gilded Rose Kata
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 tasks
Your tasks are to :
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Add the new feature to our system so that we can begin selling a new category of items.
-
Present the system as a web application so that we can take orders worldwide.
First an introduction to our system:
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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:
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Once the sell by date has passed, Quality degrades twice as fast
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The Quality of an item is never negative
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“Aged Brie” actually increases in Quality the older it gets
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The Quality of an item is never more than 50
-
“Sulfuras”, being a legendary item, never has to be sold or decreases in Quality
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“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
New feature
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).
Misc Links
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Original Kata Code : https://github.com/NotMyself/GildedRose
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Note
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The examples shown here are generated from the source code. They therefore represent the behavior of the application at any times. Non regression is ensured by checking the absence of change in this document. Learn more here https://github.com/sfauvel/documentationtesting |
View source of project on Github
Inn test
Example of evolution by item
Item +5 Dexterity Vest
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 Once the sell by date has passed, Quality degrades twice as fast The Quality of an item is never negative The Quality of an item is never more than 50 |
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iteration |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
sellIn |
10 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
-1 |
-2 |
-3 |
-4 |
-5 |
-6 |
-7 |
-8 |
-9 |
qualities |
20 |
19 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 |
8 |
6 |
4 |
2 |
0 |
0 |
0 |
0 |
0 |
Item Aged Brie
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 Once the sell by date has passed, Quality degrades twice as fast The Quality of an item is never negative The Quality of an item is never more than 50 "Aged Brie" actually increases in Quality the older it gets |
|
iteration |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
sellIn |
2 |
1 |
0 |
-1 |
-2 |
-3 |
-4 |
-5 |
-6 |
-7 |
-8 |
-9 |
-10 |
-11 |
-12 |
-13 |
-14 |
-15 |
-16 |
-17 |
qualities |
0 |
1 |
2 |
4 |
6 |
8 |
10 |
12 |
14 |
16 |
18 |
20 |
22 |
24 |
26 |
28 |
30 |
32 |
34 |
36 |
Item Elixir of the Mongoose
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 Once the sell by date has passed, Quality degrades twice as fast The Quality of an item is never negative The Quality of an item is never more than 50 |
|
iteration |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
sellIn |
5 |
4 |
3 |
2 |
1 |
0 |
-1 |
-2 |
-3 |
-4 |
-5 |
-6 |
-7 |
-8 |
-9 |
-10 |
-11 |
-12 |
-13 |
-14 |
qualities |
7 |
6 |
5 |
4 |
3 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Item Sulfuras, Hand of Ragnaros
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 Once the sell by date has passed, Quality degrades twice as fast The Quality of an item is never negative The Quality of an item is never more than 50 "Sulfuras", being a legendary item, never has to be sold or decreases in Quality |
|
iteration |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
sellIn |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
qualities |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
Item Backstage passes to a TAFKAL80ETC concert
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 Once the sell by date has passed, Quality degrades twice as fast The Quality of an item is never negative The Quality of an item is never more than 50 "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 |
|
iteration |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
sellIn |
15 |
14 |
13 |
12 |
11 |
10 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
-1 |
-2 |
-3 |
-4 |
qualities |
20 |
21 |
22 |
23 |
24 |
25 |
27 |
29 |
31 |
33 |
35 |
38 |
41 |
44 |
47 |
50 |
0 |
0 |
0 |
0 |
Item Conjured Mana Cake
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 Once the sell by date has passed, Quality degrades twice as fast The Quality of an item is never negative The Quality of an item is never more than 50 |
|
iteration |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
sellIn |
3 |
2 |
1 |
0 |
-1 |
-2 |
-3 |
-4 |
-5 |
-6 |
-7 |
-8 |
-9 |
-10 |
-11 |
-12 |
-13 |
-14 |
-15 |
-16 |
qualities |
6 |
5 |
4 |
3 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |