From 748b1a0313d5851fa04615d183cc3e71c4caebaa Mon Sep 17 00:00:00 2001
From: Audrius Baltusis <abaltusis@exadel.com>
Date: Tue, 8 Sep 2020 18:02:37 +0300
Subject: [PATCH] Make tests great again

---
 js-jasmine/spec/gilded_rose_spec.js | 85 ++++++++++++++++++++++++++---
 1 file changed, 78 insertions(+), 7 deletions(-)

diff --git a/js-jasmine/spec/gilded_rose_spec.js b/js-jasmine/spec/gilded_rose_spec.js
index 9f267c13..5f1a9e65 100644
--- a/js-jasmine/spec/gilded_rose_spec.js
+++ b/js-jasmine/spec/gilded_rose_spec.js
@@ -1,10 +1,81 @@
-var {Shop, Item} = require('../src/gilded_rose.js');
-describe("Gilded Rose", function() {
+const {Shop, Item} = require('../src/gilded_rose.js');
 
-  it("should foo", function() {
-    const gildedRose = new Shop([ new Item("foo", 0, 0) ]);
-    const items = gildedRose.updateQuality();
-    expect(items[0].name).toEqual("fixme");
-  });
+const items = [
+    new Item("+5 Dexterity Vest", 10, 20),
+    new Item("Aged Brie", 2, 0),
+    new Item("Elixir of the Mongoose", 5, 7),
+    new Item("Sulfuras, Hand of Ragnaros", 0, 80),
+    new Item("Sulfuras, Hand of Ragnaros", -1, 80),
+    new Item("Backstage passes to a TAFKAL80ETC concert", 15, 20),
+    new Item("Backstage passes to a TAFKAL80ETC concert", 10, 49),
+    new Item("Backstage passes to a TAFKAL80ETC concert", 5, 49),
 
+    // This Conjured item does not work properly yet
+    new Item("Conjured Mana Cake", 3, 6),
+];
+
+describe("Gilded Rose", function () {
+    it("should day 1", function () {
+        const gildedRose = new Shop(deepCopy(items));
+        const result = getItems(gildedRose, items, 1);
+
+        expect(result).toEqual([
+            jasmine.objectContaining({name: '+5 Dexterity Vest', sellIn: 9, quality: 19}),
+            jasmine.objectContaining({name: 'Aged Brie', sellIn: 1, quality: 1}),
+            jasmine.objectContaining({name: 'Elixir of the Mongoose', sellIn: 4, quality: 6}),
+            jasmine.objectContaining({name: 'Sulfuras, Hand of Ragnaros', sellIn: 0, quality: 80}),
+            jasmine.objectContaining({name: 'Sulfuras, Hand of Ragnaros', sellIn: -1, quality: 80}),
+            jasmine.objectContaining({name: 'Backstage passes to a TAFKAL80ETC concert', sellIn: 14, quality: 21}),
+            jasmine.objectContaining({name: 'Backstage passes to a TAFKAL80ETC concert', sellIn: 9, quality: 50}),
+            jasmine.objectContaining({name: 'Backstage passes to a TAFKAL80ETC concert', sellIn: 4, quality: 50}),
+            jasmine.objectContaining({name: 'Conjured Mana Cake', sellIn: 2, quality: 5})
+        ]);
+    });
+
+    it("should day 2", function () {
+        const gildedRose = new Shop(deepCopy(items));
+        const result = getItems(gildedRose, items, 2);
+
+        expect(result).toEqual([
+            jasmine.objectContaining({name: '+5 Dexterity Vest', sellIn: 8, quality: 18}),
+            jasmine.objectContaining({name: 'Aged Brie', sellIn: 0, quality: 2}),
+            jasmine.objectContaining({name: 'Elixir of the Mongoose', sellIn: 3, quality: 5}),
+            jasmine.objectContaining({name: 'Sulfuras, Hand of Ragnaros', sellIn: 0, quality: 80}),
+            jasmine.objectContaining({name: 'Sulfuras, Hand of Ragnaros', sellIn: -1, quality: 80}),
+            jasmine.objectContaining({name: 'Backstage passes to a TAFKAL80ETC concert', sellIn: 13, quality: 22}),
+            jasmine.objectContaining({name: 'Backstage passes to a TAFKAL80ETC concert', sellIn: 8, quality: 50}),
+            jasmine.objectContaining({name: 'Backstage passes to a TAFKAL80ETC concert', sellIn: 3, quality: 50}),
+            jasmine.objectContaining({name: 'Conjured Mana Cake', sellIn: 1, quality: 4})
+        ]);
+    });
+
+    function getItems(shop, items, days) {
+        return days ? [...Array(days)].map(() => shop.updateQuality())[days - 1] : items;
+    }
+
+    function deepCopy(obj) {
+      // Prevent original items from mutation and make tests independent
+      // https://stackoverflow.com/a/53771927
+        if (typeof obj !== 'object' || obj === null) {
+            return obj;
+        }
+
+        if (obj instanceof Date) {
+            return new Date(obj.getTime());
+        }
+
+        if (obj instanceof Array) {
+            return obj.reduce((arr, item, i) => {
+                arr[i] = deepCopy(item);
+                return arr;
+            }, []);
+        }
+
+        if (obj instanceof Object) {
+            return Object.keys(obj).reduce((newObj, key) => {
+                newObj[key] = deepCopy(obj[key]);
+                return newObj;
+            }, {})
+        }
+    }
 });