found and fixed bug where quality could go above 50 and below 0 when change increment was greater than one

ruby/lib/gilded_rose.rb

@@ -12,6 +12,8 @@ class GildedRose
       when brie?(item)
         update_brie_quality(item)
         item.sell_in -= 1
+      when conjured?(item)
+          2.times {update_normal_quality(item)}
       end
     end
   end
@@ -21,9 +23,9 @@ class GildedRose
       when (-(Float::INFINITY)..0)
         item.quality = 0
       when 0..5 
-        item.quality += 3
+        3.times { item.quality += 1 if item.quality < 50 }
       when 6..10
-        item.quality += 2
+        2.times { item.quality += 1 if item.quality < 50 }
       when  10..Float::INFINITY
         item.quality += 1
        end
@@ -31,7 +33,7 @@ class GildedRose
 
   def self.update_normal_quality(item)
     if item.sell_in < 0
-      item.quality -= 2 unless item.quality.zero?
+      2.times {  item.quality -= 1 unless item.quality.zero?}
     else
       item.quality -= 1 unless item.quality.zero?
     end
@@ -57,8 +59,12 @@ class GildedRose
     !item.name.downcase.match(/backstage/).nil?
   end
 
+  def self.conjured?(item)
+    !item.name.downcase.match(/conjured/).nil?
+  end
+
   def self.special_item?(item)
-   ( brie?(item) ||  backstage?(item) || sulfuras?(item))
+   ( brie?(item) ||  backstage?(item) || conjured?(item) || sulfuras?(item))
   end
 
 

ruby/spec/gilded_rose_spec.rb

@@ -36,6 +36,8 @@ let(:sulfarus) { Item.new('Sulfuras, Hand of Ragnaros', 50, 80) }
       end
     end
 
+    
+
     describe 'Aged Brie input' do
       it 'increases in quality as it ages' do
         items = [Item.new("Aged Brie", 25, 45)]
@@ -89,7 +91,37 @@ let(:sulfarus) { Item.new('Sulfuras, Hand of Ragnaros', 50, 80) }
         expect(items.first.quality).to eq 0
       end
     end
-  end
+
+    describe 'conjured input' do
+      it "should degrade twice as fast as normal items" do
+        items = [Item.new("Conjured Armour", 10, 15)]
+        GildedRose.update_quality(items)
+        expect(items.first.quality).to eq 13
+      end
+      
+      it "should not degrade past 0" do
+        items = [Item.new("Conjured Armour", 10, 1)]
+        GildedRose.update_quality(items)
+        expect(items.first.quality).to eq 0
+      end
+
+      it "should degrade by 4 when sell in has passed" do
+          items = [Item.new("Conjured Armour", -1, 17)]
+          GildedRose.update_quality(items)
+          expect(items.first.quality).to eq 13
+      end
+
+      it "still should not degrade past 0 when sell in has passed" do
+        items = [Item.new("Conjured Armour", -1, 3)]
+        GildedRose.update_quality(items)
+        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", sell_in: 1, quality: 3
@@ -149,14 +181,14 @@ let(:sulfarus) { Item.new('Sulfuras, Hand of Ragnaros', 50, 80) }
 
       it 'increases in quality by 2 when sellin < 10 days' do
         items_double = double :item, name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 9, quality: 20
-        expect(items_double).to receive(:quality=).with(22)
+        expect(items_double).to receive(:quality=).with(21).twice
         GildedRose.update_backstage_quality(items_double)
         
       end
 
       it 'increases by 3 when sellin < 5' do
         items_double = double :item, name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 4, quality: 20
-        expect(items_double).to receive(:quality=).with(23)
+        expect(items_double).to receive(:quality=).with(21).exactly(3).times
         GildedRose.update_backstage_quality(items_double)
       end
 
@@ -211,6 +243,7 @@ let(:sulfarus) { Item.new('Sulfuras, Hand of Ragnaros', 50, 80) }
       expect(GildedRose.backstage?(item_double)).to eq false
     end
   end
+