def test_mixed_additions(self):
five_bucks: Expression = Money.dollar(5)
ten_francs: Expression = Money.franc(10)
bank: Bank = Bank()
bank.add_rate("CHF", "USD", 2)
result: Money = bank.reduce(five_bucks.plus(ten_francs), "USD")
self.assertEqual(Money.dollar(10), result)
def test_total_times(self):
five_bucks: Expression = Money.dollar(5)
ten_francs: Expression = Money.franc(10)
bank: Bank = Bank()
bank.add_rate("CHF", "USD", 2)
total: Expression = Total(five_bucks, ten_francs).times(2)
result: Money = bank.reduce(total, "USD")
self.assertEqual(Money.dollar(20), result)
def test_reduce_money_different_currency(self):
bank: Bank = Bank()
bank.add_rate("CHF", "USD", 2)
result: Money = bank.reduce(Money.franc(2), "USD")
self.assertEqual(Money.dollar(1), result)
def test_currency(self):
self.assertEqual("USD", Money.dollar(1).currency())
self.assertEqual("CHF", Money.franc(1).currency())
def test_equality(self):
self.assertEqual(Money.dollar(5), Money.dollar(5))
self.assertNotEqual(Money.dollar(5), Money.dollar(6))
self.assertNotEqual(Money.franc(5), Money.dollar(5))
def test_franc_multiplication(self):
five: Money = Money.franc(5)
self.assertEqual(Money.franc(10), five.times(2))
self.assertEqual(Money.franc(15), five.times(3))