protected override void establish_context()
 {
     base.establish_context();
     query_executor = new StubQueryExecutor();
     system_under_test = new PageTypeBuilderRepository(query_executor);
 }
 protected override void establish_context()
 {
     base.establish_context();
     var repository = new PageTypeBuilderRepository(new StubQueryExecutor());
     system_under_test = repository.FindDescendantsOf<QueryPage>(PageReference.StartPage);
 }