def test_buying_of_nonexistant_product(capfd):
machine = VendingMachine()
machine.insert_coin(2)
machine.buy_product("coke")
out, err = capfd.readouterr()
assert "'coke' is not available" in out
def test_buying_of_last_product_then_buying_again(capfd):
product_count = 1
machine = VendingMachine()
machine.insert_coin(2)
machine.insert_coin(2)
machine.add_product_to_list("coke", product_count, 1.5)
machine.buy_product("coke")
out, err = capfd.readouterr()
assert "'coke' is not available" not in out
machine.buy_product("coke")
out, err = capfd.readouterr()
assert "'coke' is not available" in out
def test_buy_product_and_get_remainder():
# snickers price = 1.2
machine = VendingMachine()
machine.insert_coin(1)
machine.insert_coin(0.05)
machine.insert_coin(0.5)
money, product = machine.buy_product("snickers")
assert machine.truncate(sum(money)) == 0.35
assert product == "snickers"
def test_buy_nonexisting_product(capfd):
machine = VendingMachine()
machine.insert_coin(1)
machine.insert_coin(0.05)
machine.insert_coin(0.5)
money, product = machine.buy_product("machine itself")
assert 1.55 == sum(money)
out, err = capfd.readouterr()
assert product is None
assert "'machine itself' is not available" in out
def test_product_count_change_after_buying():
machine = VendingMachine()
machine.insert_coin(2.0)
machine.buy_product("snickers")
assert machine.products.get("snickers")[-1] == 9