With this class:

class Something():
    def __init__(self, name) -> None:
        self.name=name
    
    @property
    def value(self):
        # In real life, something long and complicated
        return "no"

I would like to test it, and mock .value to return .name instead.

In my test function, I have:

def side_effect(side_self:Something):
    return side_self.name

with patch.object(Something, "value", side_effect=side_effect, autospec=True):
    ...

Errors out because Something().value return a MagicMock, not the str (name) I expect.

If instead I patch with (Something, "value", new_callable=PropertyMock, side_effect=side_effect I get .side_effect() missing 1 required positional argument: 'side_self'

How can I mock value to return name?