refacto destroy action and add spec for unauthorized user

app/controllers/users/transfers_controller.rb

@@ -20,11 +20,14 @@ module Users
 
     def destroy
       transfer = DossierTransfer.find(params[:id])
+      authorized = (transfer.email == current_user.email || transfer.dossiers.exists?(dossiers: { user: current_user }))
 
-      authorized_email = (transfer.email == current_user.email || transfer.dossiers.where(dossiers: { user: current_user }).present?)
-      return if !authorized_email
-
+      if authorized
         transfer.destroy_and_nullify
+        flash.notice = t("users.dossiers.transferer.destroy")
+      else
+        flash.alert = t("users.dossiers.transferer.unauthorized_destroy")
+      end
       redirect_to dossiers_path
     end
 

config/locales/views/users/dossier_transfer/en.yml

@@ -9,3 +9,5 @@ en:
         email_label: Email of the recipient account
         submit: Send transfer request
         notice_sent: The transfer request has been sent successfully
+        destroy: The transfer request has been deleted successfully
+        unauthorized_destroy: You don't have the authorization to delete this transfer request

config/locales/views/users/dossier_transfer/fr.yml

@@ -9,3 +9,5 @@ fr:
         email_label: Email du compte destinataire
         submit: Envoyer la demande de transfert
         notice_sent: L'invitation au transfert a été envoyée avec succès
+        destroy: La demande de transfert a été supprimée avec succès
+        unauthorized_destroy: Vous n'avez pas l'autorisation pour supprimer cette demande de transfert

spec/controllers/users/transfers_controller_spec.rb

@@ -18,6 +18,8 @@ describe Users::TransfersController, type: :controller do
       it "deletes dossier transfert" do
         subject
         expect { dossier_transfert.reload }.to raise_error(ActiveRecord::RecordNotFound)
+        expect { (flash.notice).to eq('La demande de transfert a été supprimée avec succès') }
+        expect { (subject).to redirect_to dossiers_path }
       end
     end
 
@@ -37,6 +39,27 @@ describe Users::TransfersController, type: :controller do
         expect { dossier_transfert.reload }.to raise_error(ActiveRecord::RecordNotFound)
       end
     end
+
+    context "as transfer unauthorized" do
+      let(:dossier_transfert) { DossierTransfer.initiate(recipient_user.email, [dossier]) }
+      let(:random_user) { create(:user) }
+
+      subject { delete :destroy, params: { id: dossier_transfert.id } }
+
+      before do
+        sign_in(random_user)
+      end
+
+      it { expect { subject }.not_to raise_error }
+
+      it "does not delete dossier transfert" do
+        subject
+
+        expect { dossier_transfert.reload.to eq(dossier_transfert) }
+        expect { (flash.alert).to eq("Vous n'avez pas l'autorisation pour supprimer cette demande de transfert") }
+        expect { (subject).to redirect_to dossiers_path }
+      end
+    end
   end
 
   describe "POST create" do