def test_get_arbitrary_rate_converting_to_base_currency_correct_call():
db = FakeDatabase(dict())
get_base_rate_ = MagicMock()
with patch('cx.common.rates.get_base_rate', new=get_base_rate_):
get_arbitrary_rate(db=db,
date=date(2018, 5, 11),
from_="USD",
to="EUR")
get_base_rate_.assert_called_with(db=db, date=date(2018, 5, 11), to="USD")
def test_get_arbitrary_rate_validate_target_currency():
db = FakeDatabase(dict())
target_currency = MagicMock()
validate_currency_ = MagicMock()
with patch('cx.common.rates.validate_currency', new=validate_currency_):
try:
get_arbitrary_rate(db=db,
date=date(2018, 5, 11),
to=target_currency,
from_="EUR")
except:
pass
validate_currency_.assert_any_call(target_currency)
def test_get_arbitrary_rate_converting_from_base_currency_correct_value():
db = FakeDatabase(dict())
get_base_rate_ = MagicMock()
get_base_rate_.return_value = MagicMock()
with patch('cx.common.rates.get_base_rate', new=get_base_rate_):
assert get_arbitrary_rate(db=db,
date=date(2018, 5, 11),
from_="EUR",
to="USD") == get_base_rate_.return_value
def test_get_arbitrary_rate_converting_arbitrary_currency_correct_value(
currency, rate):
db = FakeDatabase(dict())
get_base_rate_ = MagicMock()
get_base_rate_.side_effect = lambda db, date, to: rate if to == currency else 2
with patch('cx.common.rates.get_base_rate', new=get_base_rate_):
assert get_arbitrary_rate(db=db,
date=date(2018, 5, 11),
from_="USD",
to=currency) == pytest.approx(rate / 2)
def test_get_arbitrary_rate_identical_currencies():
db = FakeDatabase(dict())
assert get_arbitrary_rate(db=db,
date=date(2018, 5, 11),
from_="USD",
to="USD") == 1.0
def get(self, date, from_, to):
return {"rate": get_arbitrary_rate(db, parse_date(date), from_, to)}