def test_remove_exchange_rate(self):
st = rockefeller.MemoryExchangeRates()
st.remove_exchange_rate(usd, eur)
assert st.get_exchange_rate(rockefeller.Currency.USD,
rockefeller.Currency.EUR) is None
assert st.get_exchange_rate(rockefeller.Currency.EUR,
rockefeller.Currency.USD) is None
def test_not_stored_exchange_rate(self):
st = rockefeller.MemoryExchangeRates()
assert st.get_exchange_rate(rockefeller.Currency.USD,
rockefeller.Currency.EUR) is None
def test_add_exchange_rate(self):
st = rockefeller.MemoryExchangeRates()
st.add_exchange_rate(usd, eur, 1.0)
assert st.get_exchange_rate(rockefeller.Currency.USD,
rockefeller.Currency.EUR) == 1.0