def remaining_sell_amount(self) -> Wad:
unavailable_buy_amount = self._exchange.get_unavailable_buy_amount(
self)
if unavailable_buy_amount >= self.buy_amount:
return Wad(0)
else:
return Wad.max(
self.pay_amount -
(unavailable_buy_amount * self.pay_amount / self.buy_amount),
Wad(0))
def test_max_value_should_reject_comparison_with_ints(self):
with pytest.raises(ArithmeticError):
Wad.max(Wad(10), 20)
with pytest.raises(ArithmeticError):
Wad.max(15, Wad(25))
def test_max_value_should_reject_comparison_with_rays(self):
with pytest.raises(ArithmeticError):
Wad.max(Wad(10), Ray(20))
with pytest.raises(ArithmeticError):
Wad.max(Wad(25), Ray(15))
def test_max_value(self):
assert Wad.max(Wad(10), Wad(20)) == Wad(20)
assert Wad.max(Wad(25), Wad(15)) == Wad(25)
assert Wad.max(Wad(25), Wad(15), Wad(40)) == Wad(40)
def remaining_buy_amount(self) -> Wad:
return Wad.max(
self.buy_amount - self._exchange.get_unavailable_buy_amount(self),
Wad(0))
