from unittest import skipUnless

from django.core import checks

from django.db import connection, 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",

                )

            ],

        )

    def test_CommaSeparatedIntegerField_deprecated(self):

        class CommaSeparatedIntegerModel(models.Model):

            csi = models.CommaSeparatedIntegerField(max_length=64)

        model = CommaSeparatedIntegerModel()

        self.assertEqual(

            model.check(),

            [

                checks.Error(

                    "CommaSeparatedIntegerField is removed except for support in "

                    "historical migrations.",

                    hint=(

                        "Use "

                        "CharField(validators=[validate_comma_separated_integer_list]) "

                        "instead."

                    ),

                    obj=CommaSeparatedIntegerModel._meta.get_field("csi"),

                    id="fields.E901",

                )

            ],

        )

    def test_nullbooleanfield_deprecated(self):

        class NullBooleanFieldModel(models.Model):

            nb = models.NullBooleanField()

        model = NullBooleanFieldModel()

        self.assertEqual(

            model.check(),

            [

                checks.Error(

                    "NullBooleanField is removed except for support in historical "

                    "migrations.",

                    hint="Use BooleanField(null=True) instead.",

                    obj=NullBooleanFieldModel._meta.get_field("nb"),

                    id="fields.E903",

                ),

            ],

        )

    @skipUnless(connection.vendor == "postgresql", "PostgreSQL specific SQL")

    def test_postgres_jsonfield_deprecated(self):

        from django.contrib.postgres.fields import JSONField

        class PostgresJSONFieldModel(models.Model):

            field = JSONField()

        self.assertEqual(

            PostgresJSONFieldModel.check(),

            [

                checks.Error(

                    "django.contrib.postgres.fields.JSONField is removed except "

                    "for support in historical migrations.",

                    hint="Use django.db.models.JSONField instead.",

                    obj=PostgresJSONFieldModel._meta.get_field("field"),

                    id="fields.E904",

                ),

            ],

        )