mock descriptor issue

mock_descriptor_issue.py

from mock import patch


class RealOne(object):
    def quack(self):
        print '> quack'


class BarDescriptor(object):
    def __get__(self, obj, type=None):
        real = RealOne()
        return real


class Foo(object):
    bar = BarDescriptor()


with patch('__main__.Foo.bar', autospec=True):
    print '> Foo.bar:', Foo.bar
    print '> quack:', Foo.bar.quack()