in reply to
Re^5: Neither system testing nor user acceptance testing is the repeat of unit testing (OT)
in thread Neither system testing nor user acceptance testing is the repeat of unit testing (OT)
I'm not limiting myself to exceptions and throws - I'm talking about exception flows - parts of the cod that gets executed when something goes wrong. This may result in an exception getting thrown, but only if the designer (probably not me) says I can throw - should the design be at that level of polish. Maybe the designer says - thou will not throw an exception in your implementation - I might disagree, but thats what I _have_ to do. I dont think I'd have a job long if I said "screw you , I'm throwing one anyway."
What I am referring to are testing the decision I made for the implementation of the design. _If_ I chose to use an on-disk file as part of my solution, and _if_ I wrote code to handle different I/O failures, I would want to make sure I wrote unit test cases to check I correctly implemented handling the different failures. Maybe I just handle them and dont tell the caller anything, maybe I log it and continue on. Whatever I chose to do, I should test I implemented correctly. How wise my on-disk solution is, that's a different question.
In short, those things I can test from the interface/design point-of-view, I agree with you completely and I should test black-box, those things that are artifacts of my implementation, but not part of the interface/design, I should test black-box if I can, and white box where I need to. Its all about making sure you tested "everything" - well it is for me, unit testing my code to as close to 100% coverage as possible is what I aim for. In the OP's case, calling a bad SQL wasnt something their testing had caught. Somewhere, if they ran a coverage report, they might see where that SQL was being injected, as a piece of code that hadn't been tested - a very white box approach.
...reality must take precedence over public relations, for nature cannot be fooled. - R P Feynmann