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from django.db import IntegrityError, transaction
from django.test import TestCase, skipUnlessDBFeature
from .models import PossessedCar
class TestTestCase(TestCase):
@skipUnlessDBFeature('can_defer_constraint_checks')
@skipUnlessDBFeature('supports_foreign_keys')
def test_fixture_teardown_checks_constraints(self):
rollback_atomics = self._rollback_atomics
self._rollback_atomics = lambda connection: None # noop
try:
car = PossessedCar.objects.create(car_id=1, belongs_to_id=1)
with self.assertRaises(IntegrityError), transaction.atomic():
self._fixture_teardown()
car.delete()
finally:
self._rollback_atomics = rollback_atomics
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