update_normal_item method updates items without quality allowances if quality > 0

ruby/lib/gilded_rose.rb

@@ -7,11 +7,11 @@ class GildedRose
   def self.update_quality(items)
     items.map 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
+            update_normal_quality(item)
           end
-        end
+
       else
         if item.quality < 50
           item.quality = item.quality + 1
@@ -52,6 +52,10 @@ class GildedRose
     end
     items
   end
+
+  def self.update_normal_quality(item)
+    item.quality -= 1 unless item.quality.zero?
+  end
 end
 
 class Item

ruby/spec/gilded_rose_spec.rb

@@ -2,6 +2,7 @@ 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
@@ -84,10 +85,23 @@ let(:sulfarus) { Item.new('Sulfuras, Hand of Ragnaros', 50, 80) }
         expect(items.first.quality).to eq 0
       end
     end
+  end
+  describe '#update_normal_quality' do
+    it 'updates the quality of a normal item' do
+      item_double = double :item, name: "potato", sellIn: 1, quality: 3
+      expect(item_double).to receive(:quality=).with(2)
+      GildedRose.update_normal_quality(item_double)
+    end
 
-  
+    it 'does not update quality if quality == 0' do
- 
+      item_double = double :item, name: "potato", sellIn: 1, quality: 0
+      expect(item_double).not_to receive(:quality=).with(-1)
+      GildedRose.update_normal_quality(item_double)
+    end
 
   end
+ 
+
+  
 
 end