celery/t/unit/utils/test_pickle.py

from celery.utils.serialization import pickle


class RegularException(Exception):
    pass


class ArgOverrideException(Exception):

    def __init__(self, message, status_code=10):
        self.status_code = status_code
        Exception.__init__(self, message, status_code)


class test_Pickle:

    def test_pickle_regular_exception(self):
        exc = None
        try:
            raise RegularException('RegularException raised')
        except RegularException as exc_:
            exc = exc_

        pickled = pickle.dumps({'exception': exc})
        unpickled = pickle.loads(pickled)
        exception = unpickled.get('exception')
        assert exception
        assert isinstance(exception, RegularException)
        assert exception.args == ('RegularException raised',)

    def test_pickle_arg_override_exception(self):

        exc = None
        try:
            raise ArgOverrideException(
                'ArgOverrideException raised', status_code=100,
            )
        except ArgOverrideException as exc_:
            exc = exc_

        pickled = pickle.dumps({'exception': exc})
        unpickled = pickle.loads(pickled)
        exception = unpickled.get('exception')
        assert exception
        assert isinstance(exception, ArgOverrideException)
        assert exception.args == ('ArgOverrideException raised', 100)
        assert exception.status_code == 100