application.rb

# config/application.rb
# Loading
config.autoload_paths += %W( #{Rails.root.to_s}/lib )

deauthorizer.rb

# lib/social/linkedin/deauthorizer.rb
module Social
  module LinkedIn

  end
end

gistfile1.txt

NameError: uninitialized constant Social::LinkedIn
    test/functional/linkedin_auth_controller_test.rb:116:in `block in <class:LinkedinAuthControllerTest>'

linkedin_auth_controller_test.rb

  test "deauthorize oauth token" do 
    u = create_user!
    login_as(u) 

    Social::LinkedIn::Deauthorizer.expects(:deauthorize).with(u)
    post :deauthorize

    assert_redirected_to settings_path
  end