MySQL bad behavior

mysql> create table test (texto varchar(3));
Query OK, 0 rows affected (0.08 sec)

mysql> describe test
    -> ;
+-------+------------+------+-----+---------+-------+
| Field | Type       | Null | Key | Default | Extra |
+-------+------------+------+-----+---------+-------+
| texto | varchar(3) | YES  |     | NULL    |       |
+-------+------------+------+-----+---------+-------+
1 row in set (0.00 sec)

mysql> insert into test values ('1234');
Query OK, 1 row affected, 1 warning (0.00 sec)

mysql> select * from test;
+-------+
| texto |
+-------+
| 123   |
+-------+
1 row in set (0.01 sec)