def _mock_add_spec()

in later/unittest/backport/mock.py [0:0]


    def _mock_add_spec(self, spec, spec_set, _spec_as_instance=False,
                       _eat_self=False):
        _spec_class = None
        _spec_signature = None
        _spec_asyncs = []

        for attr in dir(spec):
            if asyncio.iscoroutinefunction(getattr(spec, attr, None)):
                _spec_asyncs.append(attr)

        if spec is not None and not _is_list(spec):
            if isinstance(spec, type):
                _spec_class = spec
            else:
                _spec_class = type(spec)
            res = _get_signature_object(spec,
                                        _spec_as_instance, _eat_self)
            _spec_signature = res and res[1]

            spec = dir(spec)

        __dict__ = self.__dict__
        __dict__['_spec_class'] = _spec_class
        __dict__['_spec_set'] = spec_set
        __dict__['_spec_signature'] = _spec_signature
        __dict__['_mock_methods'] = spec
        __dict__['_spec_asyncs'] = _spec_asyncs