add rsepc test

ruby/gilded_rose.rb

@@ -8,9 +8,9 @@ class GildedRose
       next if item.name == "Sulfuras, Hand of Ragnaros"
 
       if item.name == "Aged Brie"
-        item.quality += 1 if item.quality < 50
+        increases_proportionally_to_times(item)
       elsif item.name == "Backstage passes to a TAFKAL80ETC concert"
-        increases_proportionally_to_age(item)
+        increases_proportionally_to_times(item)
       else
         decrease_quality(item)
       end
@@ -36,12 +36,12 @@ class GildedRose
     item.quality -= decrement if item.quality > 0
   end
 
-  def increases_proportionally_to_age(item)
+  def increases_proportionally_to_times(item)
     if item.sell_in <= 10
-      item.quality += 1 if item.quality < 50
+      item.quality += 2 if item.quality < 50
     end
     if item.sell_in <= 5
-      item.quality += 1 if item.quality < 50
+      item.quality += 3 if item.quality < 50
     end
   end
 end

ruby/gilded_rose_spec.rb

@@ -3,9 +3,49 @@ require 'rspec'
 require File.join(File.dirname(__FILE__), 'gilded_rose')
 
 describe GildedRose do
-  it "does not change the name" do
-    items = [Item.new("foo", 0, 0)]
-    GildedRose.new(items).update_quality()
-    expect(items[0].name).to eq "fixme"
+  let(:items) { [Item.new("foo", 10, 20)] }
+  let(:gilded_rose) { GildedRose.new(items) }
+
+  it 'decreases quality and sell in' do
+    gilded_rose.update_quality
+    expect(items[0].sell_in).to eq(9)
+    expect(items[0].quality).to eq(19)
+  end
+
+  it "not decrease quality below 0" do
+    items[0].quality = 0
+    gilded_rose.update_quality
+    expect(items[0].quality).to eq(0) 
+  end
+
+  context "with Aged Brie" do
+    let(:items) { [Item.new("Aged Brie", 10, 20)] }
+
+    it 'quality never be more than 50' do
+      items[0].quality = 50
+      gilded_rose.update_quality
+      expect(items[0].quality).to eq(50)
+    end
+
+    it 'increases proportionally to time until 10' do
+      items[0].sell_in = 7
+      gilded_rose.update_quality
+      expect(items[0].quality).to eq(22)
+    end
+
+    it 'increases proportionally to time until 5' do
+      items[0].sell_in = 5
+      gilded_rose.update_quality
+      expect(items[0].quality).to eq(25)
+    end
+  end
+
+  context 'with Conjured' do
+    let(:items) { [Item.new("Conjured", 10, 20)] }
+
+    it 'decreases by 2' do
+      gilded_rose.update_quality
+      expect(items[0].quality).to eq(18)
+    end
   end
 end