diff --git a/js-jest/src/gilded_rose.js b/js-jest/src/gilded_rose.js
index 48746965..0fac2b1e 100644
--- a/js-jest/src/gilded_rose.js
+++ b/js-jest/src/gilded_rose.js
@@ -1,16 +1,35 @@
 class Item {
-  constructor(name, sellIn, quality){
+  constructor(name, sellIn, quality) {
     this.name = name;
     this.sellIn = sellIn;
     this.quality = quality;
   }
 }
 
+class Rules {
+  constructor(dailyQualityChangeValue, maxQuality, minQuality, tenDayChange, fiveDayChange,
+    isZeroDayQualityDrop, zeroDayQualityValue) {
+    this.dailyQualityChangeValue = dailyQualityChangeValue;
+    this.maxQuality = maxQuality;
+    this.minQuality = minQuality;
+    this.tenDayChange = tenDayChange;
+    this.fiveDayChange = fiveDayChange;
+    this.isZeroDayQualityDrop = isZeroDayQualityDrop;
+    this.zeroDayQualityValue = zeroDayQualityValue;
+  }
+}
+
 class Shop {
-  constructor(items=[]){
+  constructor(items = []) {
     this.items = items;
   }
+
+
   updateQuality() {
+    const rules = {
+      'Aged Brie': new Rules(1, 50, 0, 1, 1),
+      'Backstage passes to a TAFKAL80ETC concert': new Rules(1, 50, 0)
+    }
     for (let i = 0; i < this.items.length; i++) {
       if (this.items[i].name != 'Aged Brie' && this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
         if (this.items[i].quality > 0) {
diff --git a/js-jest/test/gilded_rose.test.js b/js-jest/test/gilded_rose.test.js
index c8e0e3d7..efc04800 100644
--- a/js-jest/test/gilded_rose.test.js
+++ b/js-jest/test/gilded_rose.test.js
@@ -1,9 +1,23 @@
-const {Shop, Item} = require("../src/gilded_rose");
+const { Shop, Item } = require("../src/gilded_rose");
 
-describe("Gilded Rose", function() {
-  it("should foo", function() {
+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");
+  });
+
+  it("Aged Brie test", function () {
+    const items = [
+      new Item("Aged Brie", 2, 0),
+    ];
+    const gildedRose = new Shop(items);
+    for (let day = 0; day < 4; day++) {
+      console.log(`\n-------- day ${day} --------`);
+      console.log("name, sellIn, quality");
+      items.forEach(item => console.log(`${item.name}, ${item.sellIn}, ${item.quality}`));
+      gildedRose.updateQuality();
+    }
+    expect(items[0].name).toBe("Aged Brie");
   });
 });