Finished adding tests

package.json

@@ -22,8 +22,8 @@
     "rimraf": "~3.0.2",
     "source-map-support": "^0.5.20",
     "ts-jest": "^27.0.7",
-    "ts-node": "^10.4.0",
+    "ts-node": "^10.9.2",
     "tsconfig-paths": "^3.11.0",
-    "typescript": "^4.4.4"
+    "typescript": "^4.9.5"
   }
 }

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 +20,103 @@ describe('Gilded Rose', () => {
       const items = gildedRose.updateQuality();
 
       // Assert
-      expect(items[0].quality).toBe(1);
+      expect(items[0].quality).toBe(0);
     })
+
+    it('Confit de Canard quality drops by 1', () => {
+          // Arrange
+          const confitDeCanard = new GildedRose([new Item('Confit de Canard', 100, 10)]);
+
+          // Act
+          const items = confitDeCanard.updateQuality();
+
+          // Assert
+          expect(items[0].quality).toBe(9);
+        })
+
+    it('Confit de Canard remains 0', () => {
+              // Arrange
+              const confitDeCanard = new GildedRose([new Item('Confit de Canard', 100, 0)]);
+
+              // Act
+              const items = confitDeCanard.updateQuality();
+
+              // Assert
+              expect(items[0].quality).toBe(0);
+            })
+
+    it('Aged Brie quality increases by 1', () => {
+          const agedBrie = new GildedRose([new Item('Aged Brie', 70, 1)]);
+
+          const items = agedBrie.updateQuality();
+
+          expect(items[0].quality).toBe(2);
+    })
+
+    it('Aged Brie quality increases by 2 and sword quality decreases by 2', () => {
+          const objects = new GildedRose([new Item('Aged Brie', 70, 1), new Item('Sword', 80, 6)]);
+
+          let items;
+          for (let i = 0; i < 2; i++) {
+            items = objects.updateQuality();
+          }
+
+
+           expect(items[0].quality).toBe(3);
+           expect(items[1].quality).toBe(4);
+    })
+
+    it('Aged Brie quality caps at 50', () => {
+      const agedBrie = new GildedRose([new Item('Aged Brie', 70, 1)]);
+
+      let items;
+
+      for (let i = 0; i < 100; i++) {
+        items = agedBrie.updateQuality();
+        }
+
+      expect(items[0].quality).toBe(50);
+    })
+
+    it('Sulfuras value remains 80', () => {
+        const sulfuras = new GildedRose([new Item('Sulfuras, Hand of Ragnaros', 70, 80)]);
+
+        let items;
+
+        for (let i = 0; i < 100; i++) {
+          items = sulfuras.updateQuality();
+        }
+
+        expect(items[0].quality).toBe(80);
+    })
+
+    it('Backstage passes evolution', () => {
+      const backstagePasses = new GildedRose([new Item('Backstage passes to a TAFKAL80ETC concert', 30, 0)]);
+
+      let items;
+
+      for (let i = 0; i < 20; i++) {
+        items = backstagePasses.updateQuality();
+        }
+
+      expect(items[0].quality).toBe(20);
+
+      for (let i = 0; i < 5; i++) {
+        items = backstagePasses.updateQuality();
+        }
+
+      expect(items[0].quality).toBe(30);
+
+      for (let i = 0; i < 5; i++) {
+        items = backstagePasses.updateQuality();
+        }
+
+      expect(items[0].quality).toBe(45);
+
+      for (let i = 0; i < 5; i++) {
+        items = backstagePasses.updateQuality();
+        }
+
+      expect(items[0].quality).toBe(0);
+      })
 });