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"""
Tests for file field behavior, and specifically #639, in which Model.save()
gets called *again* for each FileField. This test will fail if calling a
ModelForm's save() method causes Model.save() to be called more than once.
"""
from __future__ import absolute_import
import os
import shutil
from django.core.files.uploadedfile import SimpleUploadedFile
from django.utils import unittest
from django.utils._os import upath
from .models import Photo, PhotoForm, temp_storage_dir
class Bug639Test(unittest.TestCase):
def testBug639(self):
"""
Simulate a file upload and check how many times Model.save() gets
called.
"""
# Grab an image for testing.
filename = os.path.join(os.path.dirname(upath(__file__)), "test.jpg")
with open(filename, "rb") as fp:
img = fp.read()
# Fake a POST QueryDict and FILES MultiValueDict.
data = {'title': 'Testing'}
files = {"image": SimpleUploadedFile('test.jpg', img, 'image/jpeg')}
form = PhotoForm(data=data, files=files)
p = form.save()
# Check the savecount stored on the object (see the model).
self.assertEqual(p._savecount, 1)
def tearDown(self):
"""
Make sure to delete the "uploaded" file to avoid clogging /tmp.
"""
p = Photo.objects.get()
p.image.delete(save=False)
shutil.rmtree(temp_storage_dir)
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