def assertMigrated(self, old_setting):
        """
        Migrates the given setting and checks whether it correctly converted
        to an ordered list of stores within Mixed.
        """
        # pass a copy of the old setting since the migration modifies the given setting
        new_mixed_setting = convert_module_store_setting_if_needed(copy.deepcopy(old_setting))

        # check whether the configuration is encapsulated within Mixed.
        self.assertEqual(new_mixed_setting["default"]["ENGINE"], "xmodule.modulestore.mixed.MixedModuleStore")

        # check whether the stores are in an ordered list
        new_stores = get_mixed_stores(new_mixed_setting)
        self.assertIsInstance(new_stores, list)

        return new_mixed_setting, new_stores[0]

# If Segment.io key specified, load it and turn on Segment.io if the feature flag is set
# Note that this is the Studio key. There is a separate key for the LMS.
SEGMENT_IO_KEY = AUTH_TOKENS.get('SEGMENT_IO_KEY')
if SEGMENT_IO_KEY:
    FEATURES['SEGMENT_IO'] = ENV_TOKENS.get('SEGMENT_IO', False)

AWS_ACCESS_KEY_ID = AUTH_TOKENS["AWS_ACCESS_KEY_ID"]
if AWS_ACCESS_KEY_ID == "":
    AWS_ACCESS_KEY_ID = None

AWS_SECRET_ACCESS_KEY = AUTH_TOKENS["AWS_SECRET_ACCESS_KEY"]
if AWS_SECRET_ACCESS_KEY == "":
    AWS_SECRET_ACCESS_KEY = None

DATABASES = AUTH_TOKENS['DATABASES']
MODULESTORE = convert_module_store_setting_if_needed(AUTH_TOKENS.get('MODULESTORE', MODULESTORE))
CONTENTSTORE = AUTH_TOKENS['CONTENTSTORE']
DOC_STORE_CONFIG = AUTH_TOKENS['DOC_STORE_CONFIG']
# Datadog for events!
DATADOG = AUTH_TOKENS.get("DATADOG", {})
DATADOG.update(ENV_TOKENS.get("DATADOG", {}))

# TODO: deprecated (compatibility with previous settings)
if 'DATADOG_API' in AUTH_TOKENS:
    DATADOG['api_key'] = AUTH_TOKENS['DATADOG_API']

# Celery Broker
CELERY_ALWAYS_EAGER = ENV_TOKENS.get("CELERY_ALWAYS_EAGER", False)
CELERY_BROKER_TRANSPORT = ENV_TOKENS.get("CELERY_BROKER_TRANSPORT", "")
CELERY_BROKER_HOSTNAME = ENV_TOKENS.get("CELERY_BROKER_HOSTNAME", "")
CELERY_BROKER_VHOST = ENV_TOKENS.get("CELERY_BROKER_VHOST", "")

AUTH_TOKENS = convert_tokens(AUTH_TOKENS)

vars().update(AUTH_TOKENS)

##########################################
# Manipulate imported settings with code
#

if AWS_ACCESS_KEY_ID == "":
    AWS_ACCESS_KEY_ID = None

if AWS_SECRET_ACCESS_KEY == "":
    AWS_SECRET_ACCESS_KEY = None

MODULESTORE = convert_module_store_setting_if_needed(MODULESTORE)

# TODO: deprecated (compatibility with previous settings)
if 'DATADOG_API' in AUTH_TOKENS:
    DATADOG['api_key'] = AUTH_TOKENS['DATADOG_API']

BROKER_URL = "{0}://{1}:{2}@{3}/{4}".format(CELERY_BROKER_TRANSPORT,
                                            CELERY_BROKER_USER,
                                            CELERY_BROKER_PASSWORD,
                                            CELERY_BROKER_HOSTNAME,
                                            CELERY_BROKER_VHOST)

######################## CUSTOM COURSES for EDX CONNECTOR ######################
if FEATURES.get('CUSTOM_COURSES_EDX'):
    INSTALLED_APPS += ('openedx.core.djangoapps.ccxcon',)