Testing Omniauth with Devise, Rspec and Capybara

facebook_registration.rb

background do
   set_omniauth()
   click_link_or_button 'Sign up with Facebook'
end

omniauth_helpers.rb

# You can read about this gist at: http://wealsodocookies.com/posts/how-to-test-facebook-login-using-devise-omniauth-rspec-and-capybara

def set_omniauth(opts = {})
  default = {:provider => :facebook,
             :uuid     => "1234",
             :facebook => {
                            :email => "[email protected]",
                            :gender => "Male",
                            :first_name => "foo",
                            :last_name => "bar"
                          }
            }

  credentials = default.merge(opts)
  provider = credentials[:provider]
  user_hash = credentials[provider]

  OmniAuth.config.test_mode = true

  OmniAuth.config.mock_auth[provider] = {
    'uid' => credentials[:uuid],
    "extra" => {
    "user_hash" => {
      "email" => user_hash[:email],
      "first_name" => user_hash[:first_name],
      "last_name" => user_hash[:last_name],
      "gender" => user_hash[:gender]
      }
    }
  }
end

def set_invalid_omniauth(opts = {})
  
  credentials = { :provider => :facebook,
                  :invalid  => :invalid_crendentials
                 }.merge(opts)
  
  OmniAuth.config.test_mode = true
  OmniAuth.config.mock_auth[credentials[:provider]] = credentials[:invalid]

end 

You need to use:

OmniAuth.config.mock_auth[provider] = OmniAuth::AuthHash.new({

instead of

OmniAuth.config.mock_auth[provider] = {

otherwise you won't be able to access stuff like auth.provider