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kata-refactor's Introduction

Poniższe zadanie zostało stworzone do ćwiczenia praktycznych umiejętności refaktoryzacji kodu. W katalogu tests znajduje się 19 testów, które w momencie rozpoczęcia zadania wszystkie uruchamiają się i przechodzą prawidłowo. Testy te będą podstawowym narzędziem umożliwiającym kontrolę refaktoryzowanego kodu. Twoim zadaniem jest refaktoryzacja kodu – czyli wprowadzanie zmian, które poprawią jego jakość, nie zmieniając przy tym logiki działania. Jakie zmiany prowadzisz, jakiś wzorców lub dobrych praktyk użyjesz – zależy od Ciebie. Każda poprawa jakości kodu jest lepsza niż jej brak! Pamiętaj jednak, że w momencie oddawania zadania wszystkie testy muszą ponownie przechodzić poprawnie.

Zadanie powinno być uruchamiane w PHP 7.3. Testy jednostkowe zostały napisane z użyciem frameworka phpunit w wersji 8.2 i na takim powinny być odpalane. Opis zadania zawierający wyjaśnienie logiki biznesowej zawartej w klasie GildedRose.php znajduje się poniżej.

Requirements

  • composer
  • php 7.3
  • phpunit 8.2

Instalation

To install dependencies run composer install. To run test use ./vendor/bin/phpunit.

Introduction

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 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

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.

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