Test task

ruby/gilded_rose.rb

@@ -1,56 +1,93 @@
+# frozen_string_literal: true
+
 class GildedRose
+  MAX_QUALITY = 50
 
   def initialize(items)
     @items = items
   end
 
-  def update_quality()
+  def update_quality
     @items.each do |item|
-      if item.name != "Aged Brie" and item.name != "Backstage passes to a TAFKAL80ETC concert"
-        if item.quality > 0
-          if item.name != "Sulfuras, Hand of Ragnaros"
-            item.quality = item.quality - 1
-          end
-        end
+      case item.name
+      when 'Aged Brie'
+        update_aged_brie(item)
+      when 'Backstage passes to a TAFKAL80ETC concert'
+        update_backstage_passes(item)
+      when 'Sulfuras, Hand of Ragnaros'
+        next # Sulfuras remains unchanged, move to the next item
+      when 'Conjured Mana Cake'
+        update_conjured(item)
       else
-        if item.quality < 50
-          item.quality = item.quality + 1
-          if item.name == "Backstage passes to a TAFKAL80ETC concert"
-            if item.sell_in < 11
-              if item.quality < 50
-                item.quality = item.quality + 1
-              end
-            end
-            if item.sell_in < 6
-              if item.quality < 50
-                item.quality = item.quality + 1
-              end
-            end
-          end
-        end
-      end
-      if item.name != "Sulfuras, Hand of Ragnaros"
-        item.sell_in = item.sell_in - 1
-      end
-      if item.sell_in < 0
-        if item.name != "Aged Brie"
-          if item.name != "Backstage passes to a TAFKAL80ETC concert"
-            if item.quality > 0
-              if item.name != "Sulfuras, Hand of Ragnaros"
-                item.quality = item.quality - 1
-              end
-            end
-          else
-            item.quality = item.quality - item.quality
-          end
-        else
-          if item.quality < 50
-            item.quality = item.quality + 1
-          end
-        end
+        update_normal_item(item)
       end
     end
   end
+
+  private
+
+  def update_aged_brie(item)
+    increase_quality(item)
+    decrease_sell_in(item)
+  end
+
+  def update_backstage_passes(item)
+    if positive_sell?(item)
+      if item.sell_in > 11
+        increase_quality(item)
+      elsif item.sell_in > 6
+        increase_quality(item, 2)
+      else
+        increase_quality(item, 3)
+      end
+    else
+      item.quality = 0
+    end
+
+    decrease_sell_in(item)
+  end
+
+  def update_normal_item(item)
+    decrease_quality(item, 2)
+    decrease_sell_in(item)
+  end
+
+  def update_conjured(item)
+    decrease_quality(item, 2)
+    decrease_sell_in(item)
+  end
+
+  def increase_quality(item, rate = 1)
+    return item.quality if minimum_sell?(item)
+
+    item.quality += rate if maximum_quality?(item)
+  end
+
+  def decrease_sell_in(item)
+    item.sell_in -= 1
+  end
+
+  def decrease_quality(item, rate = 1)
+    return item.quality if minimum_sell?(item)
+
+    item.quality -= rate if positive_sell?(item)
+  end
+
+  def positive_sell?(item)
+    item.sell_in.positive?
+  end
+
+  def negative_sell?(item)
+    item.sell_in.negative?
+  end
+
+  def minimum_sell?(item)
+    item.sell_in <= 0
+  end
+
+  def maximum_quality?(item)
+    item.quality < MAX_QUALITY
+  end
 end
 
 class Item
@@ -62,7 +99,7 @@ class Item
     @quality = quality
   end
 
-  def to_s()
+  def to_s
     "#{@name}, #{@sell_in}, #{@quality}"
   end
 end

ruby/gilded_rose_spec.rb

@@ -1,7 +1,7 @@
+require 'rspec'
 require File.join(File.dirname(__FILE__), 'gilded_rose')
 
-describe GildedRose do
-
+RSpec.describe GildedRose do
   describe "#update_quality" do
     it "does not change the name" do
       items = [Item.new("foo", 0, 0)]
@@ -9,5 +9,4 @@ describe GildedRose do
       expect(items[0].name).to eq "fixme"
     end
   end
-
 end