test existing behaviour for aged brie

ruby/spec/gilded_rose_spec.rb

@@ -8,32 +8,45 @@ let(:potato) { Item.new('potato', 15, 2)}
       GildedRose.update_quality(items)
       expect(items[0].name).to eq "foo"
     end
+    describe 'non-special item input' do
+      it 'should decrese the quality of normal item' do
+        items = [potato]
+        GildedRose.update_quality(items)
+        expect(items.first.quality).to eq (1)
+      end
 
-    it 'should decrese the quality of normal item' do
-      items = [potato]
-      GildedRose.update_quality(items)
-      expect(items.first.quality).to eq (1)
+      it 'should decrese the sellIn of normal item' do
+        items = [potato]
+        GildedRose.update_quality(items)
+        expect(items.first.sell_in).to eq (14)
+      end
+
+      it 'should decrease quality of normal items by 2 when sell_in date passes' do
+        items = [Item.new("old potato", 0, 20)]
+        GildedRose.update_quality(items)
+        expect(items.first.quality).to eq (18)
+      end
+
+      it 'should not decrease quality below 0' do
+        items = [Item.new("old potato", 0, 0)]
+        GildedRose.update_quality(items)
+        expect(items.first.quality).to eq (0)
+      end
     end
 
-    it 'should decrese the sellIn of normal item' do
-      items = [potato]
-      GildedRose.update_quality(items)
-      expect(items.first.sell_in).to eq (14)
+    describe 'Aged Brie input' do
+      it 'increases in quality as it ages' do
+        items = [Item.new("Aged Brie", 25, 45)]
+        GildedRose.update_quality(items)
+        expect(items.first.quality).to eq 46
+      end
+
+      it 'cannot increase in quality beyond 50' do
+        items = [Item.new("Aged Brie", 25, 50)]
+        GildedRose.update_quality(items)
+        expect(items.first.quality).to eq 50
+      end
     end
-
-    it 'should decrease quality of normal items by 2 when sell_in date passes' do
-      items = [Item.new("old potato", 0, 20)]
-      GildedRose.update_quality(items)
-      expect(items.first.quality).to eq (18)
-    end
-
-    it 'should not decrease quality below 0' do
-      items = [Item.new("old potato", 0, 0)]
-      GildedRose.update_quality(items)
-      expect(items.first.quality).to eq (0)
-    end
-
-
  
 
   end