Added changes based on code review comments

spec/models/project_spec.rb

@@ -33,6 +33,7 @@ RSpec.describe Project, factory_default: :keep do
     it { is_expected.to have_many(:deploy_keys) }
     it { is_expected.to have_many(:hooks) }
     it { is_expected.to have_many(:protected_branches) }
+    it { is_expected.to have_many(:exported_protected_branches) }
     it { is_expected.to have_one(:slack_service) }
     it { is_expected.to have_one(:microsoft_teams_service) }
     it { is_expected.to have_one(:mattermost_service) }

spec/presenters/projects/import_export/project_export_presenter_spec.rb

@@ -45,6 +45,14 @@ RSpec.describe Projects::ImportExport::ProjectExportPresenter do
     end
   end
 
+  describe '#protected_branches' do
+    it 'returns the project exported protected branches' do
+      expect(project).to receive(:exported_protected_branches)
+
+      subject.protected_branches
+    end
+  end
+
   describe '#project_members' do
     let(:user2) { create(:user, email: 'group@member.com') }
     let(:member_emails) do