Rspec: Test redirects in Devise::OmniauthCallbacksController subclass - ruby-on-rails

Question

Following the Railscast on Devise and OmniAuth I have implemented an OmniauthCallbacksController < Devise::OmniauthCallbacksController which contains a single method to handle an OmniAuth callback:
def all
user = User.from_omniauth(request.env["omniauth.auth"])
if user.persisted?
sign_in_and_redirect user
else
session["devise.user_attributes"] = user.attributes
redirect_to new_user_registration_url
end
end
alias_method :facebook, :all
routes.rb:
devise_for :users, controllers: {omniauth_callbacks: "omniauth_callbacks", :sessions => "sessions" }
I would like to customise this, so I'm trying to test it using RSpec. The question is how do I test this method and the redirects?
If in the spec I put user_omniauth_callback_path(:facebook) it doesn't complain about the route not existing, but doesn't seem to actually call the method.
According to this answer "controller tests use the four HTTP verbs (GET, POST, PUT, DELETE), regardless of whether your controller is RESTful." I tried get user_... etc. but here it does complain that the route doesn't exist. And indeed if I do rake routes it shows there is no HTTP verb for this route:
user_omniauth_callback [BLANK] /users/auth/:action/callback(.:format) omniauth_callbacks#(?-mix:facebook)
Can you see what I'm missing?
EDIT
So following this question one way of calling the method is:
controller.send(:all)
However I then run into the same error that the questioner ran into:
ActionController::RackDelegation#content_type delegated to #_response.content_type, but #_response is nil

Answer 1

You will need to do three things to get this accomplished.
enter OmniAuth test environment
create an OmniAuth test mock
stub out your from_omniauth method to return a user
Here is a possible solution, entered in the spec itself
(spec/feature/login_spec.rb for example) . . .
let(:current_user) { FactoryGirl.create(:user) }
before do
OmniAuth.config.test_mode = true
OmniAuth.config.mock_auth[:facebook] = OmniAuth::AuthHash.new({
provider: :facebook,
uid:'12345',
info: {
name: "Joe"
}
})
User.stub(:from_omniauth).and_return(current_user)
end
I adapted this from a google authentication, so facebook may require more fields, but those are the only ones required by omniauth docs. You should be able to find the correct fields by looking at your database schema and finding fields that match the documentation.
In my case, the minimum was enough to pass the request phase and move onto the stubbed out method returning my user.
This example also uses FactoryGirl.
It may not be perfect, but I hope it helps. Good luck!
-Dan

Answer 2

If you hit this and you are running rspec 3.4 this example should work for you:
describe Users::OmniauthCallbacksController, type: :controller do
let(:current_user) { FactoryGirl.create(:user) }
before do
OmniAuth.config.test_mode = true
OmniAuth.config.mock_auth[:your_oauth_provider_here] = OmniAuth::AuthHash.new(
provider: :your_oauth_provider_here,
uid: rand(5**10),
credentials: { token: ENV['CLIENT_ID'], secret: ENV['CLIENT_SECRET'] }
)
request.env['devise.mapping'] = Devise.mappings[:user]
allow(#controller).to receive(:env) { { 'omniauth.auth' => OmniAuth.config.mock_auth[:your_oauth_provider_here] } }
allow(User).to receive(:from_omniauth) { current_user }
end
describe '#your_oauth_provider_here' do
context 'new user' do
before { get :your_oauth_provider_here }
it 'authenticate user' do
expect(warden.authenticated?(:user)).to be_truthy
end
it 'set current_user' do
expect(current_user).not_to be_nil
end
it 'redirect to root_path' do
expect(response).to redirect_to(root_path)
end
end
end
end

Answer 3

I am experiencing problem for writhing RSpec for OmniauthCallbacksController, do some research on this and it working for me. Here is my codes, if anyone found necessary. Tests are for happy path and it should work for news version of RSpec eg. 3.x
require 'spec_helper'
describe OmniauthCallbacksController, type: :controller do
describe "#linkedin" do
let(:current_user) { Fabricate(:user) }
before(:each) do
OmniAuth.config.test_mode = true
OmniAuth.config.mock_auth[:linkedin] = OmniAuth::AuthHash.new({provider: :linkedin, uid: '12345', credentials: {token: 'linkedin-token', secret: 'linkedin-secret'}})
request.env["devise.mapping"] = Devise.mappings[:user]
#controller.stub!(:env).and_return({"omniauth.auth" => OmniAuth.config.mock_auth[:linkedin]})
User.stub(:from_auth).and_return(current_user)
end
describe "#linkedin" do
context "with a new linkedin user" do
before { get :linkedin }
it "authenticate user" do
expect(warden.authenticated?(:user)).to be_truthy
end
it "set current_user" do
expect(subject.current_user).not_to be_nil
end
it "redirect to root_path" do
expect(response).to redirect_to(root_path)
end
end
end
end
end