fixture for fakesessions

#! /usr/bin/env python
from icontrol.session import iControlRESTSession

@pytest.fixture
def fakeicontrolsession(monkeypatch):
    class Response(object):
        def json(self):
            return {'selfLink': 'https://localhost/mgmt/tm/sys?ver=11.6.0'}
    fakesessionclass = mock.create_autospec(iControlRESTSession, spec_set=True)
    fakesessioninstance =\
        mock.create_autospec(iControlRESTSession('A', 'B'), spec_set=True)
    fakesessioninstance.get = mock.MagicMock(return_value=Response())
    fakesessionclass.return_value = fakesessioninstance
    monkeypatch.setattr('f5.bigip.iControlRESTSession', fakesessionclass)