bug(expert/avis#instruction): raise when instructeur was merged

spec/controllers/experts/avis_controller_spec.rb

@@ -104,6 +104,17 @@ describe Experts::AvisController, type: :controller do
           expect(flash.alert).to eq("Vous n’avez pas accès à cet avis.")
         end
       end
+      context 'with merged instructeur who was claimant' do
+        render_views
+        it 'does not raise' do
+          old_claimant = create(:instructeur)
+          avis_with_merged_instructeur = create(:avis, dossier: dossier, claimant: old_claimant, experts_procedure: experts_procedure)
+          instructeur.user.merge(old_claimant.user)
+          sign_in(avis_with_merged_instructeur.expert.user)
+          get :instruction, params: { id: avis_with_merged_instructeur.id, procedure_id: procedure.id }
+          expect(response).to have_http_status(200)
+        end
+      end
     end
 
     describe '#messagerie' do