mariadb/mysql-test/include/have_semisync_plugin.inc

#
# Check if server has support for loading plugins
#
if (`SELECT @@have_dynamic_loading != 'YES'`) {
  --skip Requires dynamic loading
}

#
# Check if the variable SEMISYNC_MASTER_PLUGIN is set
#
if (`select LENGTH('$SEMISYNC_MASTER_PLUGIN') = 0`)
{
  skip Need semisync plugins;
}

#
# Check if --plugin-dir was setup for semisync
#
if (`SELECT CONCAT('--plugin-dir=', @@plugin_dir) != '$SEMISYNC_PLUGIN_OPT'`) {
  --skip SEMISYNC plugin requires that --plugin-dir is set to the semisync plugin dir (either the .opt file does not contain \$SEMISYNC_PLUGIN_OPT or another plugin is in use)
}