fix(dossier_transfer): require a valid email

Cf #7621

app/controllers/users/transfers_controller.rb

@@ -2,8 +2,14 @@ module Users
   class TransfersController < UserController
     def create
       transfer = DossierTransfer.new(transfer_params)
-      transfer.save!
-      redirect_to dossiers_path
+
+      if transfer.valid?
+        transfer.save!
+        redirect_to dossiers_path
+      else
+        flash.alert = transfer.errors.full_messages
+        redirect_to transferer_dossier_path(transfer_params[:dossiers].first)
+      end
     end
 
     def update
@@ -23,12 +29,16 @@ module Users
     private
 
     def transfer_params
-      transfer_params = params.require(:dossier_transfer).permit(:email, :dossiers)
-      if transfer_params[:dossiers].present?
-        transfer_params.merge(dossiers: [current_user.dossiers.find(transfer_params[:dossiers])])
+      transfer_params = params.require(:dossier_transfer).permit(:email, :dossier)
+
+      dossier_id = transfer_params.delete(:dossier)
+      dossiers = if dossier_id.present?
+        [current_user.dossiers.find(dossier_id)]
       else
-        transfer_params.merge(dossiers: current_user.dossiers)
+        current_user.dossiers
       end
+
+      transfer_params.merge(dossiers: dossiers)
     end
   end
 end

app/views/users/dossiers/transferer.html.haml

@@ -5,5 +5,5 @@
   = form_for @transfer, url: transfers_path, html: { class: 'form mt-2' } do |f|
     = f.label :email, 'Email du compte destinataire'
     = f.email_field :email
-    = f.hidden_field :dossiers, value: dossier.id
+    = f.hidden_field :dossier, value: dossier.id
     = f.submit "Envoyer la demande de transfert", class: 'button primary'

spec/controllers/users/transfers_controller_spec.rb

@@ -13,4 +13,33 @@ describe Users::TransfersController, type: :controller do
 
     it { expect { dossier_transfert.reload }.to raise_error(ActiveRecord::RecordNotFound) }
   end
+
+  describe "POST create" do
+    subject { post :create, params: { dossier_transfer: { email: email, dossier: dossier.id } } }
+
+    before { subject }
+
+    context "with valid email" do
+      let(:email) { "test@rspec.net" }
+
+      it { expect(DossierTransfer.last.email).to eq(email) }
+      it { expect(DossierTransfer.last.dossiers).to eq([dossier]) }
+    end
+
+    shared_examples 'email error' do
+      it { expect { subject }.not_to change { DossierTransfer.count } }
+      it { expect(flash.alert).to match([/invalide/]) }
+      it { is_expected.to redirect_to transferer_dossier_path(dossier.id) }
+    end
+
+    context "when email is empty" do
+      let(:email) { "" }
+      it_behaves_like 'email error'
+    end
+
+    context "when email is invalid" do
+      let(:email) { "not-an-email" }
+      it_behaves_like 'email error'
+    end
+  end
 end