test(cartaction): update test against "payload" property

improves #35

src/app/store/modules/cart/actions/cartAction.js

@@ -3,4 +3,4 @@ import * as types from '@/store/ActionTypes';
 
 import { makeActionCreator } from '@/store/helpers/makeActionCreator';
 
-export default makeActionCreator(types.CART_DATA, 'cart');
+export default makeActionCreator(types.CART_DATA);

src/app/store/modules/cart/actions/cartAction.test.js

@@ -3,9 +3,10 @@
 import cartAction from './cartAction';
 
 describe('cartAction action', () => {
-  it('should return the quantity', () => {
+  it('should return cart object', () => {
     const quantity = 0;
-    const expectedData = { type: 'CART_DATA', cart: { quantity } };
-    expect(cartAction({ quantity })).toEqual(expectedData);
+    const payload = { cart: { quantity } };
+    const expectedData = { type: 'CART_DATA', payload };
+    expect(cartAction(payload)).toEqual(expectedData);
   });
 });