django1/tests/model_regress/test_pickle.py

54 lines
2.1 KiB
Python

import pickle
import warnings
from django.db import models, DJANGO_VERSION_PICKLE_KEY
from django.test import TestCase
from django.utils.encoding import force_text
from django.utils.version import get_major_version, get_version
class ModelPickleTestCase(TestCase):
def test_missing_django_version_unpickling(self):
"""
#21430 -- Verifies a warning is raised for models that are
unpickled without a Django version
"""
class MissingDjangoVersion(models.Model):
title = models.CharField(max_length=10)
def __reduce__(self):
reduce_list = super(MissingDjangoVersion, self).__reduce__()
data = reduce_list[-1]
del data[DJANGO_VERSION_PICKLE_KEY]
return reduce_list
p = MissingDjangoVersion(title="FooBar")
with warnings.catch_warnings(record=True) as recorded:
pickle.loads(pickle.dumps(p))
msg = force_text(recorded.pop().message)
self.assertEqual(msg,
"Pickled model instance's Django version is not specified.")
def test_unsupported_unpickle(self):
"""
#21430 -- Verifies a warning is raised for models that are
unpickled with a different Django version than the current
"""
class DifferentDjangoVersion(models.Model):
title = models.CharField(max_length=10)
def __reduce__(self):
reduce_list = super(DifferentDjangoVersion, self).__reduce__()
data = reduce_list[-1]
data[DJANGO_VERSION_PICKLE_KEY] = str(float(get_major_version()) - 0.1)
return reduce_list
p = DifferentDjangoVersion(title="FooBar")
with warnings.catch_warnings(record=True) as recorded:
pickle.loads(pickle.dumps(p))
msg = force_text(recorded.pop().message)
self.assertEqual(msg,
"Pickled model instance's Django version %s does not "
"match the current version %s."
% (str(float(get_major_version()) - 0.1), get_version()))