public void GetAll_RetrieveAllItems_AllItemsRetrieved()
        {
            // arrange
            InMemoryWarehouseRepository inmemorywarehouserepository = new InMemoryWarehouseRepository();
            inmemorywarehouserepository.Add(new Warehouse(1, 10, 10));
            inmemorywarehouserepository.Add(new Warehouse(1, 15, 20));

            // act
            List<Warehouse> warehouselist = (List<Warehouse>)inmemorywarehouserepository.GetAll();

            // assert
            Assert.AreEqual(warehouselist.Count, 2);
        }
        public void Add_Item_AddedItem()
        {
            // arrange
            InMemoryWarehouseRepository inmemorywarehouserepository = new InMemoryWarehouseRepository();

            // act
            inmemorywarehouserepository.Add(new Warehouse(1, 10, 10));

            // assert
            List<Warehouse> warehouselist = (List<Warehouse>)inmemorywarehouserepository.GetAll();

            Assert.AreEqual(warehouselist.Count, 1);
        }