add initial state and first updateQuality tests

js-jest/test/gilded_rose.test.js

@@ -1,9 +1,50 @@
 const {Shop, Item} = require("../src/gilded_rose");
+const gildedRose = new Shop([
+    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),
 
-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");
+    // This Conjured item does not work properly yet
+    new Item("Conjured Mana Cake", 3, 6),
+  ]);
+
+describe("Initial state", function () {
+  it("number of items should equal 9", function () {
+    expect(gildedRose.items.length).toBe(9);
   });
 });
+
+describe("After one updateQuality call", function() {
+  it("Miscellaneous item should have decremented sellIn by 1", function() {
+    const items = gildedRose.updateQuality();
+    expect(items[0].sellIn).toBe(9);
+  });
+
+  it("Miscellaneous item should have decremented quality by 1", function() {
+    const items = gildedRose.updateQuality();
+    expect(items[0].quality).toBe(19);
+  });
+
+  it("Aged Brie should have decremented sellIn by 1", function() {
+    const items = gildedRose.updateQuality();
+    expect(items[1].sellIn).toBe(1);
+  });
+
+  it("Aged Brie should have incremented quality by 1", function() {
+    const items = gildedRose.updateQuality();
+    expect(items[1].quality).toBe(1);
+  });
+
+  // it("should foo", function() {
+  //   const items = gildedRose.updateQuality();
+  //   expect(items[0].name).toBe("fixme");
+  // });
+});
+
+
+