MDEV-13743: galera_toi_truncate may fail with: query 'reap' succeeded - should...

MDEV-13743: galera_toi_truncate may fail with: query 'reap' succeeded - should have failed with errno 1213

Replace sleep with debug sync point before insert commit to
make sure insert is not executed before truncate has started.

mysql-test/suite/galera/r/galera_toi_truncate.result

@@ -2,6 +2,8 @@ CREATE TABLE ten (f1 INTEGER) ENGINE=InnoDB;
 INSERT INTO ten VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
 CREATE TABLE t1 (f1 INTEGER) ENGINE=InnoDB;
 SET SESSION wsrep_retry_autocommit = 0;
+INSERT INTO t1(f1) SELECT 1 FROM ten as a1, ten AS a2;
+set debug_sync='ha_commit_trans_after_prepare WAIT_FOR go';
 INSERT INTO t1 (f1) SELECT 1 FROM ten AS a1, ten AS a2, ten AS a3, ten AS a4, ten AS a5, ten AS a6;;
 TRUNCATE TABLE t1;;
 ERROR 40001: Deadlock found when trying to get lock; try restarting transaction

mysql-test/suite/galera/t/galera_toi_truncate.test

@@ -5,6 +5,8 @@
 
 --source include/galera_cluster.inc
 --source include/have_innodb.inc
+--source include/have_debug_sync.inc
+--source include/not_embedded.inc
 
 #
 # INSERT and TRUNCATE on different nodes
@@ -16,14 +18,23 @@ INSERT INTO ten VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
 
 CREATE TABLE t1 (f1 INTEGER) ENGINE=InnoDB;
 
-# Insert 100K rows
+# Insert 1m rows
 --connection node_2
+--let $wait_condition = SELECT COUNT(*) = 10 FROM ten;
+--source include/wait_condition.inc
+
 # Prevent autocommit retring from masking the deadlock error we expect to get
 SET SESSION wsrep_retry_autocommit = 0;
+INSERT INTO t1(f1) SELECT 1 FROM ten as a1, ten AS a2;
+
+set debug_sync='ha_commit_trans_after_prepare WAIT_FOR go';
 --send INSERT INTO t1 (f1) SELECT 1 FROM ten AS a1, ten AS a2, ten AS a3, ten AS a4, ten AS a5, ten AS a6;
 
 --connection node_1
---sleep 1
+# Wait for a above insert to start
+--let $wait_condition = SELECT COUNT(*) >= 100 from t1;
+--source include/wait_condition.inc
+
 --send TRUNCATE TABLE t1;
 
 --connection node_1
@@ -38,6 +49,5 @@ SELECT COUNT(*) = 0 FROM t1;
 
 --connection node_1
 SELECT COUNT(*) = 0 FROM t1;
-
 DROP TABLE t1;
 DROP TABLE ten;