Add: unit test

TypeScript/.gitignore

@@ -8,3 +8,5 @@ test/**/*.js
 test/**/*.js.map
 coverage
 .nyc_output
+.yarn
+.DS_Store

TypeScript/test/jest/gilded-rose.spec.ts

@@ -1,9 +1,82 @@
-import { Item, GildedRose } from '@/gilded-rose';
+import { Item, GildedRose } from "@/gilded-rose";
 
-describe('Gilded Rose', () => {
-  it('should foo', () => {
-    const gildedRose = new GildedRose([new Item('foo', 0, 0)]);
+describe("Aged Brie 테스트", () => {
+  let gildedRose = new GildedRose([new Item("Aged Brie", 1, 0)]);
+
+  beforeEach(() => {
+    gildedRose = new GildedRose([new Item("Aged Brie", 2, 3)]);
+  });
+
+  it("Aged Brie의 quality는 1 증가, sellIn은 1 감소", () => {
     const items = gildedRose.updateQuality();
-    expect(items[0].name).toBe('fixme');
+
+    expect(items[0].sellIn).toBe(1);
+    expect(items[0].quality).toBe(4);
+  });
+
+  it("quality는 50을 초과할 수 없음", () => {
+    const gildedRose = new GildedRose([new Item("Aged Brie", 2, 50)]);
+    const items = gildedRose.updateQuality();
+
+    expect(items[0].sellIn).toBe(1);
+    expect(items[0].quality).toBe(50);
   });
 });
+
+describe("Surfras 테스트", () => {
+  let gildedRose = new GildedRose([
+    new Item("Sulfuras, Hand of Ragnaros", 1, 0),
+  ]);
+
+  beforeEach(() => {
+    gildedRose = new GildedRose([new Item("Sulfuras, Hand of Ragnaros", 2, 3)]);
+  });
+
+  it("Surfras의 quality는 변하지 않음, sellIn 변하지 않음", () => {
+    const items = gildedRose.updateQuality();
+
+    expect(items[0].sellIn).toBe(2);
+    expect(items[0].quality).toBe(3);
+  });
+});
+
+describe("Backstage passes 테스트", () => {
+  let gildedRose = new GildedRose([
+    new Item("Backstage passes to a TAFKAL80ETC concert", 1, 0),
+  ]);
+
+  beforeEach(() => {
+    gildedRose = new GildedRose([
+      new Item("Backstage passes to a TAFKAL80ETC concert", 2, 3),
+    ]);
+  });
+
+  it("Backstage passes의 sellIn값 1감소, quality 1증가", () => {
+    const items = gildedRose.updateQuality();
+
+    expect(items[0].sellIn).toBe(1);
+    expect(items[0].quality).toBe(6);
+  });
+
+  it("Backstage passes의 sellIn값 10일부터, quality 2증가", () => {
+    const gildedRose = new GildedRose([
+      new Item("Backstage passes to a TAFKAL80ETC concert", 10, 3),
+    ]);
+    const items = gildedRose.updateQuality();
+
+    expect(items[0].sellIn).toBe(9);
+    expect(items[0].quality).toBe(5);
+  });
+
+  it("Backstage passes의 sellIn값 5일부터, quality 3증가", () => {
+    const gildedRose = new GildedRose([
+      new Item("Backstage passes to a TAFKAL80ETC concert", 5, 3),
+    ]);
+    const items = gildedRose.updateQuality();
+
+    expect(items[0].sellIn).toBe(4);
+    expect(items[0].quality).toBe(6);
+  });
+
+  // TODO: 콘서트 종료 후 quality 0으로 변경 테스트
+});