def test_invalid_coin_value():
"""
Given a string, the insert coin function should raise a ValueError.
"""
machine = VendingMachine()
with pytest.raises(ValueError):
machine.insert_coin('5')
def test_get_change_when_balance_is_one_dollar():
"""
Given a balance of $1, a loonie should be returned.
"""
machine = VendingMachine()
for _ in range(4): # Repeat 4 times
machine.insert_coin(money.Quarter())
assert machine.get_change() == [money.Loonie()]
def test_insert_coins_stores_on_object():
"""
Given that coins are inserted in to the vending machine,
they should be stored on the object as a inserted_coins property.
"""
machine = VendingMachine()
coins = [money.Toonie(), money.TenCent(), money.FiveCent()]
for coin in coins:
machine.insert_coin(coin)
assert machine.inserted_coins == coins
def test_a_balance_that_is_not_a_multiple_of_five():
"""
Asserts that irregular balance is ignored and kept by machine.
"""
class OneCent(money.Coin):
"""One cent coin."""
value = money.DollarAmount('0.01')
machine = VendingMachine()
machine.insert_coin(OneCent())
assert machine.get_change() == []
def test_get_change_balance_is_all_coins():
"""
Asserts that different coins are returned to complete balance.
"""
machine = VendingMachine()
coins = [
money.Toonie(),
money.Loonie(),
money.Quarter(),
money.TenCent(),
money.FiveCent()
]
for coin in coins:
machine.insert_coin(coin)
assert machine.get_change() == coins
def test_get_balance_returns_the_sum_of_inserted_coins():
"""
Given each type of coin is inserted, a dollar amount of 3.40
should be returned.
"""
machine = VendingMachine()
machine.insert_coin(money.Toonie())
machine.insert_coin(money.Loonie())
machine.insert_coin(money.Quarter())
machine.insert_coin(money.TenCent())
machine.insert_coin(money.FiveCent())
assert machine.get_balance() == money.DollarAmount('3.40')
def test_get_change_balance_is_multiple_coins():
"""
Asserts that duplicate coins are returned when there is a leftover
balance.
"""
machine = VendingMachine()
coins = [
money.Loonie(),
money.Quarter(),
money.Quarter(),
money.TenCent(),
money.TenCent()
]
for coin in coins:
machine.insert_coin(coin)
assert machine.get_change() == coins
def test_get_change_when_balance_is_25_cents():
"""Asserts that a 25 cent balance returns a quarter."""
machine = VendingMachine()
machine.insert_coin(money.Quarter())
assert machine.get_change() == [money.Quarter()]
def test_get_change_when_nothing_inserted():
"""Asserts that an empty list is returned when no balance."""
machine = VendingMachine()
assert machine.get_change() == []
def test_insert_toonie():
"""
Given a toonie, no error should be raised.
"""
machine = VendingMachine()
machine.insert_coin(money.Toonie())
def test_insert_ten_cents():
"""
Given a ten cent coin, no error should be raised.
"""
machine = VendingMachine()
machine.insert_coin(money.TenCent())
def test_insert_five_cents():
"""
Given a five cent coin, no error should be raised.
"""
machine = VendingMachine()
machine.insert_coin(money.FiveCent())
def test_insert_quarter():
"""
Given a quarter, no error should be raised.
"""
machine = VendingMachine()
machine.insert_coin(money.Quarter())