Rails Ruby on Rails

I have

# in gem lib/my-gem.rb
module MyGem
  class Engine < Rails::Engine
  end

  module ClassMethods
    def self.extended(klass)
      # do some stuff
    end

    def my_gem(&block)
      instance_eval(&block)
      include MyGem::InstanceMethods
    end
  end

  module InstanceMethods
    def self.included(controller)
      controller.helper :foo
    end
  end

  ActionController::Base.extend MyGem::ClassMethods
end

...

class ApplicationController < ActionController::Base
  my_gem do
    #configure my gem here
  end
end

...

#in GEM_ROOT/app/helpers exits foo.rb
module FooHelper
...
end

Works: When running application no problem.

Problem: rake test

Samuel-Woodards-MacBook-Pro:account_management.git sam$ rake test
(in /Users/sam/Development/xxx/app.git) /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:304:in depend_on': Missing helper file helpers/sessions_helper.rb (LoadError)

from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:216:in `require_dependency'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/abstract_controller/helpers.rb:148:in `modules_for_helpers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/abstract_controller/helpers.rb:144:in `map!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/abstract_controller/helpers.rb:144:in `modules_for_helpers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/action_controller/metal/helpers.rb:101:in `modules_for_helpers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/abstract_controller/helpers.rb:97:in `helper'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/bundler/gems/accounts-client-3afdb6035c7b/lib/wf/accounts.rb:204:in `included'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/bundler/gems/accounts-client-3afdb6035c7b/lib/wf/accounts.rb:37:in `include'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/bundler/gems/accounts-client-3afdb6035c7b/lib/wf/accounts.rb:37:in `accounts_client'
from /Users/sam/Development/xxx/account_management.git/app/controllers/application_controller.rb:13
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:227:in `load_dependency'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:346:in `require_or_load'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:300:in `depend_on'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:216:in `require_dependency'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:138:in `eager_load!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:137:in `each'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:137:in `eager_load!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:135:in `each'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:135:in `eager_load!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application.rb:108:in `eager_load!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application/finisher.rb:41
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:25:in `instance_exec'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:25:in `run'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:50:in `run_initializers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:49:in `each'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:49:in `run_initializers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application.rb:134:in `initialize!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application.rb:77:in `send'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application.rb:77:in `method_missing'
from /Users/sam/Development/xxx/account_management.git/config/environment.rb:5
from ./test/test_helper.rb:3:in `require'
from ./test/test_helper.rb:3
from ./test/unit/account_test.rb:1:in `require'
from ./test/unit/account_test.rb:1
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5:in `load'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5:in `each'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5

/Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:304:in depend_on': Missing helper file helpers/sessions_helper.rb (LoadError)

from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:216:in `require_dependency'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/abstract_controller/helpers.rb:148:in `modules_for_helpers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/abstract_controller/helpers.rb:144:in `map!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/abstract_controller/helpers.rb:144:in `modules_for_helpers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/action_controller/metal/helpers.rb:101:in `modules_for_helpers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/actionpack-3.0.0/lib/abstract_controller/helpers.rb:97:in `helper'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/bundler/gems/accounts-client-3afdb6035c7b/lib/wf/accounts.rb:204:in `included'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/bundler/gems/accounts-client-3afdb6035c7b/lib/wf/accounts.rb:37:in `include'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/bundler/gems/accounts-client-3afdb6035c7b/lib/wf/accounts.rb:37:in `accounts_client'
from /Users/sam/Development/xxx/account_management.git/app/controllers/application_controller.rb:13
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:227:in `load_dependency'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:346:in `require_or_load'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:300:in `depend_on'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:216:in `require_dependency'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:138:in `eager_load!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:137:in `each'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:137:in `eager_load!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:135:in `each'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/engine.rb:135:in `eager_load!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application.rb:108:in `eager_load!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application/finisher.rb:41
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:25:in `instance_exec'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:25:in `run'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:50:in `run_initializers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:49:in `each'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/initializable.rb:49:in `run_initializers'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application.rb:134:in `initialize!'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application.rb:77:in `send'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/railties-3.0.0/lib/rails/application.rb:77:in `method_missing'
from /Users/sam/Development/xxx/account_management.git/config/environment.rb:5
from ./test/test_helper.rb:3:in `require'
from ./test/test_helper.rb:3
from ./test/functional/companies_controller_test.rb:1:in `require'
from ./test/functional/companies_controller_test.rb:1
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5:in `load'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5:in `each'
from /Users/sam/.rvm/gems/ree-1.8.7-2010.02@account_management/gems/rake-0.8.7/lib/rake/rake_test_loader.rb:5

Errors running test:units, test:functionals!