public function _before()
{
parent::_before();
$this->connection = new Postgresql(['host' => TEST_DB_POSTGRESQL_HOST, 'username' => TEST_DB_POSTGRESQL_USER, 'password' => TEST_DB_POSTGRESQL_PASSWD, 'dbname' => TEST_DB_POSTGRESQL_NAME, 'port' => TEST_DB_POSTGRESQL_PORT, 'schema' => TEST_DB_POSTGRESQL_SCHEMA]);
}