from django.core import checks
from django.db import models

from .base import IsolatedModelsTestCase


class DeprecatedFieldsTests(IsolatedModelsTestCase):
    def test_IPAddressField_deprecated(self):
        class IPAddressModel(models.Model):
            ip = models.IPAddressField()

        model = IPAddressModel()
        self.assertEqual(
            model.check(),
            [checks.Error(
                'IPAddressField has been removed except for support in '
                'historical migrations.',
                hint='Use GenericIPAddressField instead.',
                obj=IPAddressModel._meta.get_field('ip'),
                id='fields.E900',
            )],
        )