text: --replication slots test 
  
  select * from pg_create_physical_replication_slot('dummystandby_slot',true);
  select * from pg_create_physical_replication_slot('standby_slot',false);
  select * from pg_create_physical_replication_slot('standby_slot',false);
  
  select * from pg_replication_slots order by 1;
  
  select * from pg_drop_replication_slot('dummystandby_slot');
  select * from pg_drop_replication_slot('standby_slot');
  select * from pg_drop_replication_slot('wrong_slot_name');