Merge pull request #21 from kraftjs/section-4.1.3-patch

Add assertion to check inventory and update addItemToCart function to pass

Author: lucasfcosta

chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/cartController.js

@@ -1,4 +1,4 @@
-const { removeFromInventory } = require("./inventoryController");
+const { inventory, removeFromInventory } = require("./inventoryController");
 const logger = require("./logger");
 
 const carts = new Map();
@@ -8,6 +8,7 @@ const addItemToCart = (username, item) => {
   const newItems = (carts.get(username) || []).concat(item);
 
   if (!compliesToItemLimit(newItems)) {
+    inventory.set(item, inventory.get(item) + 1);
     const limitError = new Error(
       "You can't have more than three units of an item in your cart"
     );

chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/cartController.test.js

@@ -47,7 +47,8 @@ describe("addItemToCart", () => {
     }
 
     expect(carts.get("test_user")).toEqual(initialCartContent);
-    expect.assertions(2);
+    expect(inventory.get('cheesecake')).toEqual(1);
+    expect.assertions(3);
   });
 
   test("logging added items", () => {