Login user UserSession.create for rspec not working

I've got a show action for a map object which should return 200 if the current_user is the maps owner

I have defined a method on my user object "current?" which returns true or false if that user is the same as the current user

I have model spec set up for that which mocks UserSession.find.user and that works fine

But for the controller test I want it to be closer to a functional test and use the real UserSession.find.user

So Im trying to do UserSession.create in the test When I do UserSession.find.user after that in the spec the session has been created but in the controller action the session hasn't be set, and therefore .current? returns false

I've added

require 'authlogic/test_case'

class ActionController::TestCase   setup :activate_authlogic end

to the spec helper, based mainly on the example at https://github.com/akm/authlogic-rspec-example

any ideas?