Fix bug send email sign up user

app/controllers/users/registrations_controller.rb

@@ -2,6 +2,11 @@ class Users::RegistrationsController < Devise::RegistrationsController
 # before_filter :configure_sign_up_params, only: [:create]
 # before_filter :configure_account_update_params, only: [:update]
 
+  def after_sign_up_path_for(resource_or_scope)
+    WelcomeMailer.welcome_email(User.last).deliver_now!
+    super
+  end
+
   # GET /resource/sign_up
   # def new
   #   super
@@ -9,9 +14,7 @@ class Users::RegistrationsController < Devise::RegistrationsController
 
   # POST /resource
   def create
-    retour = super
-    WelcomeMailer.welcome_email(User.last).deliver_now!
-    retour
+    super
   end
 
   # GET /resource/edit

spec/controllers/users/registrations_controller_spec.rb

@@ -5,7 +5,7 @@ describe Users::RegistrationsController, type: :controller do
   let(:email) { 'test@octo.com' }
   let(:password) { 'password' }
 
-  let(:user) { { email: email, password: password, password_confirmation: password } }
+  let(:user) { {email: email, password: password, password_confirmation: password} }
 
   before do
     @request.env["devise.mapping"] = Devise.mappings[:user]
@@ -14,13 +14,25 @@ describe Users::RegistrationsController, type: :controller do
   describe '.create' do
     subject { post :create, user: user }
 
-    it { expect(described_class).to be < Devise::RegistrationsController }
+    context 'when user is correct' do
+      it { expect(described_class).to be < Devise::RegistrationsController }
 
-    it 'welcome email is send' do
-      expect(WelcomeMailer).to receive(:welcome_email).and_return(WelcomeMailer)
-      expect(WelcomeMailer).to receive(:deliver_now!)
+      it 'welcome email is send' do
+        expect(WelcomeMailer).to receive(:welcome_email).and_return(WelcomeMailer)
+        expect(WelcomeMailer).to receive(:deliver_now!)
 
-      subject
+        subject
+      end
+    end
+
+    context 'when user is not correct' do
+      let(:user) { {email: '', password: password, password_confirmation: password} }
+
+      it 'welcome email is not send' do
+        expect(WelcomeMailer).not_to receive(:welcome_email)
+
+        subject
+      end
     end
   end
 end