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import shutil
import tempfile
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
from django.core.files.base import ContentFile
from import FileSystemStorage
from django.test import TestCase
from PIL import Image
except ImportError:
import Image
from easy_thumbnails.conf import settings
class TemporaryStorage(FileSystemStorage):
A storage class useful for tests that uses a temporary location to store
all files and provides a method to remove this location when it is finished
def __init__(self, location=None, *args, **kwargs):
Create the temporary location.
if location is None:
location = tempfile.mkdtemp()
self.temporary_location = location
super(TemporaryStorage, self).__init__(location=location, *args,
def delete_temporary_storage(self):
Delete the temporary directory created during initialisation.
This storage class should not be used again after this method is
temporary_location = getattr(self, 'temporary_location', None)
if temporary_location:
class FakeRemoteStorage(TemporaryStorage):
A temporary storage class that acts similar to remote storage.
It's not thread safe.
remote_mode = False
def path(self, *args, **kwargs):
Raise ``NotImplementedError``, since this is the way that
easy-thumbnails determines if a storage is remote.
if self.remote_mode:
raise NotImplementedError
return super(FakeRemoteStorage, self).path(*args, **kwargs)
def exists(self, *args, **kwargs):
original_remote_mode = self.remote_mode
self.remote_mode = False
return super(FakeRemoteStorage, self).exists(*args, **kwargs)
self.remote_mode = original_remote_mode
def save(self, *args, **kwargs):
self.remote_mode = False
return super(FakeRemoteStorage, self).save(*args, **kwargs)
self.remote_mode = True
def open(self, *args, **kwargs):
self.remote_mode = False
return super(FakeRemoteStorage, self).open(*args, **kwargs)
self.remote_mode = True
class BaseTest(TestCase):
Remove any customised THUMBNAIL_* settings in a project's ``settings``
configuration module before running the tests to ensure there is a
consistent test environment.
def setUp(self):
Isolate all settings.
output = super(BaseTest, self).setUp()
settings.isolated = True
return output
def tearDown(self):
Restore settings to their original state.
settings.isolated = False
return super(BaseTest, self).tearDown()
def create_image(self, storage, filename, size=(800, 600),
image_mode='RGB', image_format='JPEG'):
Generate a test image, returning the filename that it was saved as.
If ``storage`` is ``None``, the StringIO containing the image data
will be passed instead.
data = StringIO(), size).save(data, image_format)
if not storage:
return data
image_file = ContentFile(
return, image_file)
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