/**
  * @expectedException Exception
  */
 public function testTransactionFail()
 {
     $this->db->query("INSERT INTO test (id, code, price) VALUES (3002, '1', 1)");
     $this->db->beginTransaction();
     $this->db->query("INSERT INTO test (id, code, price) VALUES (3002, '1', 1)");
 }