public function testTransactionFalse()
{
$result = $this->db->transaction(function () {
$this->db->query('DELETE FROM test LIMIT 1');
$this->db->query('DELETE FROM test LIMIT 1');
$this->db->query('DELETE FROM test LIMIT 1');
$this->db->query('DELETE FROM notexiststable LIMIT 1');
});
$this->assertFalse($result);
}