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from unittest.mock import Mock
from django.core.files.storage import FileSystemStorage
from imagekit.cachefiles import ImageCacheFile
from imagekit.cachefiles.backends import Simple as SimpleCFBackend
from imagekit.cachefiles.strategies import Optimistic as OptimisticStrategy
from .utils import create_image
class ImageGenerator:
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
perform IO operations.
"""
file = get_image_cache_file()
bool(file)
assert not file.storage.exists.called
assert not file.storage.open.called
def test_no_io_on_url():
"""
When getting the URL of an ImageCacheFile, the storage shouldn't be
checked.
"""
file = get_image_cache_file()
file.url
assert not file.storage.exists.called
assert not file.storage.open.called
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