add test to france connect controller

app/controllers/france_connect_controller.rb

@@ -25,5 +25,8 @@ class FranceConnectController < ApplicationController
 
       redirect_to(controller: 'users/dossiers', action: :index)
     end
+  rescue Rack::OAuth2::Client::Error => e
+    Rails.logger.error e.message
+    redirect_to(new_user_session_path)
   end
 end

spec/controllers/france_connect_controller_spec.rb

@@ -18,26 +18,25 @@ describe FranceConnectController, type: :controller do
     end
     context 'when params code is present' do
       let(:code) { 'plop' }
-      before do
-        get :callback, code: code
-      end
 
       context 'when code is correct' do
         before do
           allow(FranceConnectService).to receive(:retrieve_user_informations).and_return(Hashie::Mash.new(email: 'patator@cake.com'))
         end
         it 'redirect to dossiers list' do
+          get :callback, code: code
           expect(response).to redirect_to(controller: 'users/dossiers', action: :index)
         end
       end
 
       context 'wen code is not correct' do
         before do
-          allow(FranceConnectService).to receive(:retrieve_user_informations).and_raise(Rack::OAuth2::Client::Error)
+          allow(FranceConnectService).to receive(:retrieve_user_informations) { raise Rack::OAuth2::Client::Error.new(500, error: 'Unknown') }
         end
 
         it 'redirect to login page' do
-          expect(response).to redirect_to(controller: 'users/sign_in', action: :index)
+          get :callback, code: code
+          expect(response).to redirect_to(new_user_session_path)
         end
 
         it 'flash message error connexion with France Connect' do