Parsed test spec with 3 sessions

starting permutation: listenc notify1 notify2 notify3 notifyf
step listenc: LISTEN c1; LISTEN c2;
step notify1: NOTIFY c1;
notifier: NOTIFY "c1" with payload "" from notifier
step notify2: NOTIFY c2, 'payload';
notifier: NOTIFY "c2" with payload "payload" from notifier
step notify3: NOTIFY c3, 'payload3';
step notifyf: SELECT pg_notify('c2', NULL);
pg_notify
---------
         
(1 row)

notifier: NOTIFY "c2" with payload "" from notifier

starting permutation: listenc notifyd1 notifyd2 notifys1
step listenc: LISTEN c1; LISTEN c2;
step notifyd1: NOTIFY c2, 'payload'; NOTIFY c1; NOTIFY "c2", 'payload';
notifier: NOTIFY "c2" with payload "payload" from notifier
notifier: NOTIFY "c1" with payload "" from notifier
step notifyd2: NOTIFY c1; NOTIFY c1; NOTIFY c1, 'p1'; NOTIFY c1, 'p2';
notifier: NOTIFY "c1" with payload "" from notifier
notifier: NOTIFY "c1" with payload "p1" from notifier
notifier: NOTIFY "c1" with payload "p2" from notifier
step notifys1: 
	BEGIN;
	NOTIFY c1, 'payload'; NOTIFY "c2", 'payload';
	NOTIFY c1, 'payload'; NOTIFY "c2", 'payload';
	SAVEPOINT s1;
	NOTIFY c1, 'payload'; NOTIFY "c2", 'payload';
	NOTIFY c1, 'payloads'; NOTIFY "c2", 'payloads';
	NOTIFY c1, 'payload'; NOTIFY "c2", 'payload';
	NOTIFY c1, 'payloads'; NOTIFY "c2", 'payloads';
	RELEASE SAVEPOINT s1;
	SAVEPOINT s2;
	NOTIFY c1, 'rpayload'; NOTIFY "c2", 'rpayload';
	NOTIFY c1, 'rpayloads'; NOTIFY "c2", 'rpayloads';
	NOTIFY c1, 'rpayload'; NOTIFY "c2", 'rpayload';
	NOTIFY c1, 'rpayloads'; NOTIFY "c2", 'rpayloads';
	ROLLBACK TO SAVEPOINT s2;
	COMMIT;

notifier: NOTIFY "c1" with payload "payload" from notifier
notifier: NOTIFY "c2" with payload "payload" from notifier
notifier: NOTIFY "c1" with payload "payloads" from notifier
notifier: NOTIFY "c2" with payload "payloads" from notifier

starting permutation: llisten notify1 notify2 notify3 notifyf lcheck
step llisten: LISTEN c1; LISTEN c2;
step notify1: NOTIFY c1;
step notify2: NOTIFY c2, 'payload';
step notify3: NOTIFY c3, 'payload3';
step notifyf: SELECT pg_notify('c2', NULL);
pg_notify
---------
         
(1 row)

step lcheck: SELECT 1 AS x;
x
-
1
(1 row)

listener: NOTIFY "c1" with payload "" from notifier
listener: NOTIFY "c2" with payload "payload" from notifier
listener: NOTIFY "c2" with payload "" from notifier

starting permutation: listenc llisten notify1 notify2 notify3 notifyf lcheck
step listenc: LISTEN c1; LISTEN c2;
step llisten: LISTEN c1; LISTEN c2;
step notify1: NOTIFY c1;
notifier: NOTIFY "c1" with payload "" from notifier
step notify2: NOTIFY c2, 'payload';
notifier: NOTIFY "c2" with payload "payload" from notifier
step notify3: NOTIFY c3, 'payload3';
step notifyf: SELECT pg_notify('c2', NULL);
pg_notify
---------
         
(1 row)

notifier: NOTIFY "c2" with payload "" from notifier
step lcheck: SELECT 1 AS x;
x
-
1
(1 row)

listener: NOTIFY "c1" with payload "" from notifier
listener: NOTIFY "c2" with payload "payload" from notifier
listener: NOTIFY "c2" with payload "" from notifier

starting permutation: l2listen l2begin notify1 lbegins llisten lcommit l2commit l2stop
step l2listen: LISTEN c1;
step l2begin: BEGIN;
step notify1: NOTIFY c1;
step lbegins: BEGIN ISOLATION LEVEL SERIALIZABLE;
step llisten: LISTEN c1; LISTEN c2;
step lcommit: COMMIT;
step l2commit: COMMIT;
listener2: NOTIFY "c1" with payload "" from notifier
step l2stop: UNLISTEN *;

starting permutation: llisten lbegin usage bignotify usage
step llisten: LISTEN c1; LISTEN c2;
step lbegin: BEGIN;
step usage: SELECT pg_notification_queue_usage() > 0 AS nonzero;
nonzero
-------
f      
(1 row)

step bignotify: SELECT count(pg_notify('c1', s::text)) FROM generate_series(1, 1000) s;
count
-----
 1000
(1 row)

step usage: SELECT pg_notification_queue_usage() > 0 AS nonzero;
nonzero
-------
t      
(1 row)