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from django.core import management
from django.core.checks import Error, run_checks
from django.db.models.signals import post_init
from django.test import SimpleTestCase
from django.test.utils import override_settings
from django.utils import six
class OnPostInit(object):
def __call__(self, **kwargs):
pass
def on_post_init(**kwargs):
pass
@override_settings(
INSTALLED_APPS=['django.contrib.auth', 'django.contrib.contenttypes'],
SILENCED_SYSTEM_CHECKS=['fields.W342'], # ForeignKey(unique=True)
)
class ModelValidationTest(SimpleTestCase):
def test_models_validate(self):
# All our models should validate properly
# Validation Tests:
# * choices= Iterable of Iterables
# See: https://code.djangoproject.com/ticket/20430
# * related_name='+' doesn't clash with another '+'
# See: https://code.djangoproject.com/ticket/21375
management.call_command("check", stdout=six.StringIO())
def test_model_signal(self):
unresolved_references = post_init.unresolved_references.copy()
post_init.connect(on_post_init, sender='missing-app.Model')
post_init.connect(OnPostInit(), sender='missing-app.Model')
errors = run_checks()
expected = [
Error(
"The 'on_post_init' function was connected to the 'post_init' "
"signal with a lazy reference to the 'missing-app.Model' "
"sender, which has not been installed.",
hint=None,
obj='model_validation.tests',
id='signals.E001',
),
Error(
"An instance of the 'OnPostInit' class was connected to "
"the 'post_init' signal with a lazy reference to the "
"'missing-app.Model' sender, which has not been installed.",
hint=None,
obj='model_validation.tests',
id='signals.E001',
)
]
self.assertEqual(errors, expected)
post_init.unresolved_references = unresolved_references
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