Removed references to django.utils.unittest which is PendingDeprecation

from django.db.models.fields.files import FileField, ImageField

from django.utils import six

from django.utils.functional import lazy

from django.utils.unittest import skipIf

from .models import (

    Foo, Bar, Whiz, BigD, BigS, BigInt, Post, NullBooleanModel,

            AutoField(primary_key=True).get_prep_value(lazy_func()),

            int)

    @skipIf(six.PY3, "Python 3 has no `long` type.")

    @unittest.skipIf(six.PY3, "Python 3 has no `long` type.")

    def test_BigIntegerField(self):

        lazy_func = lazy(lambda: long(9999999999999999999), long)

        self.assertIsInstance(

from __future__ import absolute_import

import datetime

import unittest

from django.test import TransactionTestCase

from django.utils.unittest import skipUnless

from django.db import connection, DatabaseError, IntegrityError

from django.db.models.fields import IntegerField, TextField, CharField, SlugField

from django.db.models.fields.related import ManyToManyField, ForeignKey

            lambda: list(Author.objects.all()),

        )

    @skipUnless(connection.features.supports_foreign_keys, "No FK support")

    @unittest.skipUnless(connection.features.supports_foreign_keys, "No FK support")

    def test_fk(self):

        "Tests that creating tables out of FK order, then repointing, works"

        # Create the table

            BookWithM2M._meta.local_many_to_many.remove(new_field)

            del BookWithM2M._meta._m2m_cache

    @skipUnless(connection.features.supports_check_constraints, "No check constraints")

    @unittest.skipUnless(connection.features.supports_check_constraints, "No check constraints")

    def test_check_constraints(self):

        """

        Tests creating/deleting CHECK constraints