Parsed test spec with 2 sessions

starting permutation: s0_init s0_begin s0_savepoint s0_truncate s1_checkpoint s1_get_changes s0_commit s0_begin s0_insert s1_checkpoint s1_get_changes s0_commit s1_get_changes s1_get_logical_snapshot_info s1_get_logical_snapshot_meta
step s0_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
--------
init    
(1 row)

step s0_begin: BEGIN;
step s0_savepoint: SAVEPOINT sp1;
step s0_truncate: TRUNCATE tbl1;
step s1_checkpoint: CHECKPOINT;
step s1_get_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'skip-empty-xacts', '1', 'include-xids', '0');
data
----
(0 rows)

step s0_commit: COMMIT;
step s0_begin: BEGIN;
step s0_insert: INSERT INTO tbl1 VALUES (1);
step s1_checkpoint: CHECKPOINT;
step s1_get_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'skip-empty-xacts', '1', 'include-xids', '0');
data                                   
---------------------------------------
BEGIN                                  
table public.tbl1: TRUNCATE: (no-flags)
COMMIT                                 
(3 rows)

step s0_commit: COMMIT;
step s1_get_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'skip-empty-xacts', '1', 'include-xids', '0');
data                                                         
-------------------------------------------------------------
BEGIN                                                        
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:null
COMMIT                                                       
(3 rows)

step s1_get_logical_snapshot_info: SELECT info.state, info.catchange_count, array_length(info.catchange_xip,1) AS catchange_array_length, info.committed_count, array_length(info.committed_xip,1) AS committed_array_length FROM pg_ls_logicalsnapdir(), pg_get_logical_snapshot_info(name) AS info ORDER BY 2;
state     |catchange_count|catchange_array_length|committed_count|committed_array_length
----------+---------------+----------------------+---------------+----------------------
consistent|              0|                      |              2|                     2
consistent|              2|                     2|              0|                      
(2 rows)

step s1_get_logical_snapshot_meta: SELECT COUNT(meta.*) from pg_ls_logicalsnapdir(), pg_get_logical_snapshot_meta(name) as meta;
count
-----
    2
(1 row)