[Twisted-Python] testing my application

[Marcin Kasperski]

> Hmm, replying to myself, it seems that when I changed to
>
>    def setUp(self):
>       self.dbpool = adbapi.ConnectionPool('psycopg', DSN)
>       return self.dbpool.runInteraction(self._insertTestData)
>
> my test seems to work. 

Continuing replying to myself, the test seems  to work even too 
well. In fact it insist on succeeding. For instance when I 
changed sql command to some rubbish, the test still succeeds. 
For example this test is raported as succesfully executed

    def testSomething(self):
        d = self.dbpool.runQuery("RUBBISH SELECT BLAH BLAH")
        return d

I had to miss something. But ... what?