created boolean methods for brie and backstage, implemented them in a case statement

ruby/lib/gilded_rose.rb

@@ -1,18 +1,15 @@
 class GildedRose
 
-  # def initialize(items)
-  #   @items = items
-  # end
-
   def self.update_quality(items)
     items.map do |item|
-      if !special_item?(item)
-            update_normal_quality(item) 
-            item.sell_in -= 1
-      elsif item.name.downcase.match /backstage/
+      case 
+      when !special_item?(item)
+        update_normal_quality(item) 
+        item.sell_in -= 1
+      when backstage?(item)
         update_backstage_quality(item) if item.quality < 50
         item.sell_in -= 1
-      elsif item.name.downcase.match /aged brie/
+      when brie?(item)
         update_brie_quality(item)
         item.sell_in -= 1
       end
@@ -38,7 +35,6 @@ class GildedRose
     else
       item.quality -= 1 unless item.quality.zero?
     end
- 
   end
 
   def self.update_brie_quality(item)
@@ -53,9 +49,20 @@ class GildedRose
     !item.name.downcase.match( /sulfuras/).nil?
   end
 
-  def self.special_item?(item)
-   ( !item.name.downcase.match( /aged brie/).nil? ||  !item.name.downcase.match(/backstage/).nil? || sulfuras?(item))
+  def self.brie?(item)
+    !item.name.downcase.match( /aged brie/).nil?
   end
+
+  def self.backstage?(item)
+    !item.name.downcase.match(/backstage/).nil?
+  end
+
+  def self.special_item?(item)
+   ( brie?(item) ||  backstage?(item) || sulfuras?(item))
+  end
+
+
+
 end
 
 

ruby/spec/gilded_rose_spec.rb

@@ -2,10 +2,9 @@ require 'gilded_rose'
 
 describe GildedRose do
 let(:potato) { Item.new('potato', 15, 2)}
-#let(:grain) {instance_double("item", name: "potato", :quality => 5)}
 let(:sulfarus) { Item.new('Sulfuras, Hand of Ragnaros', 50, 80) }
 
-  describe "#update_quality" do
+  describe "feature tests" do
     it "does not change the name" do
       items = [Item.new("foo", 0, 0)]
       GildedRose.update_quality(items)
@@ -188,6 +187,30 @@ let(:sulfarus) { Item.new('Sulfuras, Hand of Ragnaros', 50, 80) }
 
 
   end
+
+  describe '#brie?' do
+    it 'returns true on a brie item' do
+      brie_double = double :brie, name: 'Aged Brie', sell_in: 50, quality: 80
+      expect(GildedRose.brie?(brie_double)).to eq true
+    end
+
+    it 'returns false on a non brie item' do
+      item_double = double :item, name: "potato", sell_in: 1, quality: 0
+      expect(GildedRose.sulfuras?(item_double)).to eq false
+    end
+  end
+
+  describe '#backstage?' do
+    it 'returns true on a backstage item' do
+      backstage_double = double :item, name: "Backstage passes to a TAFKAL80ETC concert"
+      expect(GildedRose.backstage?(backstage_double)).to eq true
+    end
+
+    it 'returns false on a non brie item' do
+      item_double = double :item, name: "potato", sell_in: 1, quality: 0
+      expect(GildedRose.backstage?(item_double)).to eq false
+    end
+  end