assigns: strip and lowercase the search filter

app/controllers/admin/assigns_controller.rb

@@ -17,8 +17,9 @@ class Admin::AssignsController < AdminController
 
     not_assign_scope = current_administrateur.instructeurs.where.not(id: assign_scope.ids)
 
-    if params[:filter]
+    if params[:filter].present?
-      not_assign_scope = not_assign_scope.where('users.email LIKE ?', "%#{params[:filter]}%")
+      filter = params[:filter].downcase.strip
+      not_assign_scope = not_assign_scope.where('users.email LIKE ?', "%#{filter}%")
     end
 
     @instructeurs_not_assign = smart_listing_create :instructeurs_not_assign,

spec/controllers/admin/assigns_controller_spec.rb

@@ -34,6 +34,14 @@ describe Admin::AssignsController, type: :controller do
       it 'does not filter the assigned instructeurs' do
         expect(assigns(:instructeurs_assign)).to match_array([instructeur_assigned_1, instructeur_assigned_2])
       end
+
+      context 'when the filter has spaces or a mixed case' do
+        let(:filter) { ' @ministere_A.gouv.fr  ' }
+
+        it 'trims spaces and ignores the case' do
+          expect(assigns(:instructeurs_not_assign)).to match_array([instructeur_not_assigned_1])
+        end
+      end
     end
   end