from decimal import Decimal

import pytest

from domain.marketplace.price import Price


def test_price_creation():
    price = Price(amount=Decimal("99.99"))
    assert price.amount == Decimal("99.99")


def test_price_is_immutable():
    price = Price(amount=Decimal("10.00"))

    try:
        price.amount = Decimal("20.00")  # type: ignore
        assert False, "Should have raised FrozenInstanceError"
    except AttributeError:
        pass


def test_price_can_not_be_negative():
    with pytest.raises(ValueError):
        Price(amount=Decimal("-10.00"))


def test_price_equality():
    price1 = Price(amount=Decimal("50.00"))
    price2 = Price(amount=Decimal("50.00"))
    assert price1 == price2