Mocking a class method that is used via an instance

Question

I\'m trying to patch a class method using mock as described in the documentation. The Mock object itself works fine, but its methods don\'t: For example, their attributes like <

Answer 1

from mock import *

class Lib:
    """In my actual program, a module that I import"""
    def method(self):
        return "real"

class User:
    """The class I want to test"""
    def run(self, m):

        return m.method()

with patch("__main__.Lib") as mock:
    #mock.return_value = "bla" # This works
    mock.method.return_value = "mock"

    print User().run(mock)