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from django.core import management
from django.core.management.validation import (
ModelErrorCollection, validate_model_signals
)
from django.db.models.signals import post_init
from django.test import TestCase
from django.utils import six
class OnPostInit(object):
def __call__(self, **kwargs):
pass
def on_post_init(**kwargs):
pass
class ModelValidationTest(TestCase):
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("validate", 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')
e = ModelErrorCollection(six.StringIO())
validate_model_signals(e)
self.assertSetEqual(
set(e.errors),
{(
'model_validation.tests',
"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."
), (
'model_validation.tests',
"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."
)}
)
post_init.unresolved_references = unresolved_references
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