def test_remove_then_add_item_in_inventory():
inventory = Inventory()
inventory.add("item #1", 5)
inventory.remove("item #1", 3).add("item #1", 4)
assert inventory.get("item #1") == 6
def test_cannot_remove_item_from_inventory():
inventory = Inventory()
inventory.remove("item #1", 3)
