"""
Make sure that the various IK classes can be successfully serialized and
deserialized. This is important when using IK with Celery.

"""

from .utils import create_photo, pickleback


def test_imagespecfield():
    instance = create_photo('pickletest2.jpg')
    thumbnail = pickleback(instance.thumbnail)
    thumbnail.generate()


def test_circular_ref():
    """
    A model instance with a spec field in its dict shouldn't raise a KeyError.

    This corresponds to #234

    """
    instance = create_photo('pickletest3.jpg')
    instance.thumbnail  # Cause thumbnail to be added to instance's __dict__
    pickleback(instance)