Added more tests, refactored the code and added the CI script

.github/workflows/tests.yml

@@ -1,5 +1,27 @@
 name: Run Tests
 
 on:
+    push:
+        branches:
+            - main
+
+    pull_request:
+        branches:
+            - main
 
 jobs:
+    build:
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Setup
+              uses: actions/setup-node@v2
+              with:
+                  node-version: '18'
+
+            - name: Install dependencies
+              run: |
+                  sudo apt install npm
+                  npm install
+            - name: Run the tests
+              run: npm run test:jest

app/gilded-rose.ts

@@ -17,53 +17,46 @@ export class GildedRose {
         this.items = items;
     }
 
+    updateConcertTicket(item: Item) {
+        item.quality += 1
+        if (item.sellIn < 11)
+            item.quality +=  1
+
+        if (item.sellIn < 6)
+            item.quality +=  1
+
+        if (item.quality >= 50)
+            item.quality = 50
+    }
+
     updateQuality() {
         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) {
-                    if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
-                        this.items[i].quality = this.items[i].quality - 1
-                    }
-                }
+            if (this.items[i].name == 'Sulfuras, Hand of Ragnaros')
+                break
+
+            this.items[i].sellIn -= 1
+
+            if (this.items[i].quality == 50 || this.items[i].quality == 0)
+                break
+
+            if (this.items[i].name == 'Aged Brie') {
+                this.items[i].quality += 1
+                break
+            } else if (this.items[i].name == 'Backstage passes to a TAFKAL80ETC concert') {
+                this.updateConcertTicket(this.items[i])
+            } else if (this.items[i].name == 'Conjured') {
+                this.items[i].quality -=  2
             } else {
-                if (this.items[i].quality < 50) {
-                    this.items[i].quality = this.items[i].quality + 1
-                    if (this.items[i].name == 'Backstage passes to a TAFKAL80ETC concert') {
-                        if (this.items[i].sellIn < 11) {
-                            if (this.items[i].quality < 50) {
-                                this.items[i].quality = this.items[i].quality + 1
-                            }
-                        }
-                        if (this.items[i].sellIn < 6) {
-                            if (this.items[i].quality < 50) {
-                                this.items[i].quality = this.items[i].quality + 1
-                            }
-                        }
-                    }
-                }
-            }
-            if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
-                this.items[i].sellIn = this.items[i].sellIn - 1;
+                this.items[i].quality -=  1
             }
+
             if (this.items[i].sellIn < 0) {
-                if (this.items[i].name != 'Aged Brie') {
-                    if (this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
-                        if (this.items[i].quality > 0) {
-                            if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
-                                this.items[i].quality = this.items[i].quality - 1
-                            }
-                        }
-                    } else {
-                        this.items[i].quality = this.items[i].quality - this.items[i].quality
-                    }
-                } else {
-                    if (this.items[i].quality < 50) {
-                        this.items[i].quality = this.items[i].quality + 1
-                    }
-                }
+                if (this.items[i].name == 'Backstage passes to a TAFKAL80ETC concert')
+                    this.items[i].quality = 0
             }
+
         }
 
         return this.items;
     }
-}
+}

test/jest/gilded-rose.spec.ts

@@ -9,7 +9,7 @@ describe('Gilded Rose', () => {
         const items = gildedRose.updateQuality();
 
         // Assert
-        expect(items[0].name).toBe('bar');
+        expect(items[0].name).toBe('foo');
     });
 
     it('sword quality drops by 1', () => {
@@ -20,6 +20,41 @@ describe('Gilded Rose', () => {
       const items = gildedRose.updateQuality();
 
       // Assert
-      expect(items[0].quality).toBe(1);
+      expect(items[0].quality).toBe(0);
+    })
+
+    it('Sulfuras quality doesn\'t drop', () => {
+      const gildedRose = new GildedRose([new Item('Sulfuras, Hand of Ragnaros', 0, 80)]);
+
+      const items = gildedRose.updateQuality();
+
+      expect(items[0].quality).toBe(80);
+    })
+
+    it('Aged brie increases in Quality', () => {
+      const gildedRose = new GildedRose([new Item('Aged Brie', 10, 30)]);
+
+      const items = gildedRose.updateQuality();
+
+      expect(items[0].quality).toBe(31);
+    })
+
+    it('Item quality doesn\'t exceed 50/drop below 0', () => {
+        const gildedRose1 = new GildedRose([new Item('Shield', 10, 0)]);
+        const gildedRose2 = new GildedRose([new Item('Backstage passes to a TAFKAL80ETC concert', 5, 48)]);
+
+        const item1 = gildedRose1.updateQuality();
+        const item2 = gildedRose2.updateQuality();
+
+        expect(item1[0].quality).toBe(0);
+        expect(item2[0].quality).toBe(50);
+    })
+
+    it('Conjured items degrade twice as fast', () => {
+        const gildedRose = new GildedRose([new Item('Conjured', 5, 20)]);
+
+        const items = gildedRose.updateQuality();
+
+        expect(items[0].quality).toBe(18);
     })
 });