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from django.core.files import File
from imagekit.signals import source_saved
from imagekit.specs.sourcegroups import ImageFieldSourceGroup
from nose.tools import eq_
from . models import AbstractImageModel, ImageModel, ConcreteImageModel
from .utils import get_image_file
def make_counting_receiver(source_group):
def receiver(sender, *args, **kwargs):
if sender is source_group:
receiver.count += 1
receiver.count = 0
return receiver
def test_source_saved_signal():
"""
Creating a new instance with an image causes the source_saved signal to be
dispatched.
"""
source_group = ImageFieldSourceGroup(ImageModel, 'image')
receiver = make_counting_receiver(source_group)
source_saved.connect(receiver)
ImageModel.objects.create(image=File(get_image_file()))
eq_(receiver.count, 1)
def test_no_source_saved_signal():
"""
Creating a new instance without an image shouldn't cause the source_saved
signal to be dispatched.
https://github.com/matthewwithanm/django-imagekit/issues/214
"""
source_group = ImageFieldSourceGroup(ImageModel, 'image')
receiver = make_counting_receiver(source_group)
source_saved.connect(receiver)
ImageModel.objects.create()
eq_(receiver.count, 0)
def test_abstract_model_signals():
"""
Source groups created for abstract models must cause signals to be
dispatched on their concrete subclasses.
"""
source_group = ImageFieldSourceGroup(AbstractImageModel, 'original_image')
receiver = make_counting_receiver(source_group)
source_saved.connect(receiver)
ConcreteImageModel.objects.create(original_image=File(get_image_file()))
eq_(receiver.count, 1)
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