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Gilded Rose

Inventory system for a store that buys and sells high-quality products. In this system, items decrease in quality (Quality) as their sale date approaches, and this depreciation is updated automatically.

This inventory system was developed by a person who is no longer available to make new implementations.

Below, we will explain how the current system works so you can quickly integrate

General Rules

Rule 1: Degradation of Quality and SellIn

  • Given an item with initial values of SellIn and Quality
  • When a day passes
  • Then the value of SellIn decreases by 1
  • And the value of Quality decreases by 1

Rule 2: Degradation of Quality after the sell-by date

  • Given an item with SellIn less than 0
  • When a day passes
  • Then the value of Quality decreases by 2

Rule 3: Quality is never negative

  • Given an item with Quality equal to 0
  • When a day passes
  • Then the value of Quality remains 0

Rule 4: Quality is never more than 50

  • Given an item with Quality equal to 50
  • When a day passes
  • Then the value of Quality remains 50

Special Cases

Special Case 1: Aged Brie

  • Given an item named "Aged Brie"
  • When a day passes
  • Then the value of Quality increases by 1
  • And if SellIn is less than 0, the value of Quality increases by 2

Special Case 2: Sulfuras, Hand of Ragnaros

  • Given an item named "Sulfuras, Hand of Ragnaros"
  • When a day passes
  • Then the value of SellIn and Quality remain unchanged
  • And the value of Quality is always 80

Special Case 3: Backstage passes to a TAFKAL80ETC concert

  • Given an item named "Backstage passes to a TAFKAL80ETC concert"
  • When SellIn is greater than 10
  • Then the value of Quality increases by 1
  • When SellIn is 10 or less
  • Then the value of Quality increases by 2
  • When SellIn is 5 or less
  • Then the value of Quality increases by 3
  • When SellIn is less than 0
  • Then the value of Quality is 0