[TDD] [Rails] - Rspec test for application_helper.rb fails when trying to access application_control

In a method named logo in my application helper, I reference an
application controller method (current_account) that has been marked as
a helper method with the following syntax:

helper_method :current_account

When I test out the setup in the browser (without rspec), rails is happy
with this setup.

However, when I run the spec, the spec won’t pass and gives me the
following error:

Failures:

  1. ApplicationHelper#logo image tag should point to logo.png
    Failure/Error: helper.logo.should =~ /logo.png/i
    undefined local variable or method `current_account’ for
    #ActionView::Base:0x105645108

    ./app/helpers/application_helper.rb:13:in `logo’

    ./spec/helpers/application_helper_spec.rb:21

Current Versions:
Rspec Version 2.1.0
Rails Version 3.0.1

I’ve created a gist that shows how my code is setup, and how the helper
is calling the controller method:

Does anyone know why this setup works fine outside of rspec (when I test
in the browser), but won’t work within rspec?

Is there an object / instance variable that I need to mock, or a setting
that I need to change in order for the helper spec to know about the
controller methods that have been marked as helper methods?

John Bruce