diff --git a/js-jest/src/gilded_rose.js b/js-jest/src/gilded_rose.js
index 48746965..6cb6f773 100644
--- a/js-jest/src/gilded_rose.js
+++ b/js-jest/src/gilded_rose.js
@@ -6,6 +6,16 @@ class Item {
   }
 }
 
+class ItemUpdater {
+  constructor(item) {
+    this.item = item;
+  }
+
+  updateQuality() {
+    return this.item;
+  }
+}
+
 class Shop {
   constructor(items=[]){
     this.items = items;
@@ -63,5 +73,6 @@ class Shop {
 
 module.exports = {
   Item,
-  Shop
+  Shop,
+  ItemUpdater
 }
diff --git a/js-jest/test/gilded_rose.test.js b/js-jest/test/gilded_rose.test.js
index c8e0e3d7..027d1edc 100644
--- a/js-jest/test/gilded_rose.test.js
+++ b/js-jest/test/gilded_rose.test.js
@@ -1,9 +1,17 @@
-const {Shop, Item} = require("../src/gilded_rose");
+const {Shop, Item, ItemUpdater} = require("../src/gilded_rose");
 
 describe("Gilded Rose", function() {
   it("should foo", function() {
     const gildedRose = new Shop([new Item("foo", 0, 0)]);
     const items = gildedRose.updateQuality();
-    expect(items[0].name).toBe("fixme");
+    expect(items[0].name).toBe("foo");
+  });
+});
+
+describe("Gilded Rose check common rules", function () {
+  it("should foo", function () {
+    const gildedRose = new ItemUpdater(new Item("Aged Brie", 10, 0));
+    const item = gildedRose.updateQuality();
+    expect(item.quality).toBe(10);
   });
 });