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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.
from functools import wraps
from importlib import import_module
class use_class_as_property(object):
"""
This decorator imports a library module and sets an instance
of the associated class as an attribute on the Puppeteer
object and returns it.
Note: return value of the wrapped function is ignored.
"""
def __init__(self, lib):
self.lib = lib
self.mod_name, self.cls_name = self.lib.rsplit('.', 1)
def __call__(self, func):
@property
@wraps(func)
def _(cls, *args, **kwargs):
tag = '_{}_{}'.format(self.mod_name, self.cls_name)
prop = getattr(cls, tag, None)
if not prop:
module = import_module('.{}'.format(self.mod_name),
'firefox_puppeteer')
prop = getattr(module, self.cls_name)(cls.marionette)
setattr(cls, tag, prop)
func(cls, *args, **kwargs)
return prop
return _
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