tests/invalid_models_tests/test_deprecated_fields.py


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from django.core import checks
from django.db import models
from django.test import SimpleTestCase
from django.test.utils import isolate_apps


@isolate_apps('invalid_models_tests')
class DeprecatedFieldsTests(SimpleTestCase):
    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',
            )],
        )