django-imagekit/tests/test_optimistic_strategy.py
Matthew Dapena-Tretter c92f53c1b0 Test that Optimistic strategy doesn't cause reads
Using the Optimistic strategy should prevent IO ops when you cast the
file as a boolean.
2014-09-23 18:40:58 -04:00

37 lines
1.1 KiB
Python

from nose.tools import assert_true, assert_false
from imagekit.cachefiles import ImageCacheFile
from mock import Mock
from .utils import create_image
from django.core.files.storage import FileSystemStorage
from imagekit.cachefiles.backends import Simple as SimpleCFBackend
from imagekit.cachefiles.strategies import Optimistic as OptimisticStrategy
class ImageGenerator(object):
def generate(self):
return create_image()
def get_hash(self):
return 'abc123'
def get_image_cache_file():
storage = Mock(FileSystemStorage)
backend = SimpleCFBackend()
strategy = OptimisticStrategy()
generator = ImageGenerator()
return ImageCacheFile(generator, storage=storage,
cachefile_backend=backend,
cachefile_strategy=strategy)
def test_no_io_on_bool():
"""
When checking the truthiness of an ImageCacheFile, the storage shouldn't
peform IO operations.
"""
file = get_image_cache_file()
bool(file)
assert_false(file.storage.exists.called)
assert_false(file.storage.open.called)