import pytest
from app.core import models

# Example test
@pytest.mark.parametrize("cidr, expected", [
    ('192.168.1.0/24', 256),
    ('10.0.0.0/8', 16777216),
])
def test_subnet_cidr_parsing(cidr, expected):
    subnet = models.Subnet(cidr=cidr)
    assert subnet.used_ips == expected