Added spec for GildedRose class

ruby/gilded_rose_spec.rb

@@ -1,12 +1,42 @@
-require File.join(File.dirname(__FILE__), 'gilded_rose')
+require_relative 'gilded_rose'
+require_relative 'item'
 
 describe GildedRose do
-
   describe "#update_quality" 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"
+      expect(items[0].name).to eq "foo"
+    end
+
+    it "updates quality of Aged Brie as it gets older" do
+      items = [Item.new("Aged Brie", 5, 10)]
+      GildedRose.new(items).update_quality()
+      expect(items[0].quality).to eq 11
+    end
+
+    it "updates quality of Sulfuras, Hand of Ragnaros" do
+      items = [Item.new("Sulfuras, Hand of Ragnaros", 5, 80)]
+      GildedRose.new(items).update_quality()
+      expect(items[0].quality).to eq 80
+    end
+
+    it "updates quality of Conjured item twice as fast" do
+      items = [Item.new("Conjured", 5, 10)]
+      GildedRose.new(items).update_quality()
+      expect(items[0].quality).to eq 6
+    end
+
+    it "updates quality of Backstage passes based on sell-in value" do
+      items = [Item.new("Backstage passes to a TAFKAL80ETC concert", 12, 10)]
+      GildedRose.new(items).update_quality()
+      expect(items[0].quality).to eq 11
+    end
+
+    it "sets quality of Backstage passes to 0 after concert" do
+      items = [Item.new("Backstage passes to a TAFKAL80ETC concert", 0, 10)]
+      GildedRose.new(items).update_quality()
+      expect(items[0].quality).to eq 0
     end
   end