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Re: unchecked conversion warning.

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On Sun, 10 Jun 2012 17:09:07 -0700, Lew wrote:

> The business world speaks of "siloing" - "to silo" is to isolate
> personnel to a narrow wedge of the overall project.
> 
> Siloing can be good, but in software development usually is not.
>
Yes, I'd agree, but still its desirable to have a separation between a 
module's developer(s) and its test writer(s), if only to help prevent 
misunderstandings getting baked into code.
 
> It's vanishingly unlikely to be good if it isn't done on purpose with
> full understanding of its effects.
>
Agreed.
 
> Siloing is not the same as division of responsibility.
>
Yes.

> One can divide
> responsibilities among a team who is generally, and to varying degrees
> specifically aware of various dimensions of the project.
> 
and a team that tries compartmentalize a project may well be on the track 
to failure.

> Siloing would be to keep programmers entirely away from test writing.
> 
> There is more than one type of test. Loosely, tests fall into unit tests
> and everything else.
>
I'd make a few more distinctions. Yes, unit teats are the very lowest 
level, with module tests above them. By module tests I mean anything from 
testing a function library, a small component program or, for that 
matter, even a complex class for somewhat higher level functions that can 
cover everything that module can do as an isolated component.

Next level is integration testing, which seeks to show that a system will 
work when its modules are built into a realistic configuration.

Functional tests are essentially end-to-end, user-level activities within 
a complete system. Performance tests are more of the same but with added 
'stopwatches'. Recovery tests are probably the highest level testing that 
gets done be for the user gets his hands on the system. Many shops seem 
to skimp on both performance and recovery tests judging by the number of 
systems I've seen that didn't perform adequately when data volumes got 
near the design volumes: the last data warehouse I worked on had 500,000 
facts in its test database, barely enough, yet I've seen and fixed 
databases 'tuned' with 200 or so detail records to work on.

Then, of course, acceptance testing is simply functional testing, but 
done on the target hardware with the involvement of end users.

You'll notice I've left out regression testing until now. Thats because 
its just an automated version of some combination of unit, module, or 
functional testing that is quick and easy to run and whose results are 
simple to interpret. These days I script all unit and module tests in 
such a way that I merely have to add a set of expected results and a 
comparator for them to become regression tests: if the comparator doesn't 
find any difference between expected and actual results its a pass.


-- 
martin@   | Martin Gregorie
gregorie. | Essex, UK
org       |

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unchecked conversion warning. Jens - 2012-05-30 15:32 +0200
  Re: unchecked conversion warning. Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2012-05-30 13:48 +0000
    Re: unchecked conversion warning. Jens - 2012-05-30 15:52 +0200
  Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-05-30 07:54 -0700
    Re: unchecked conversion warning. Jens - 2012-05-31 22:23 +0200
      Re: unchecked conversion warning. Lew <lewbloch@gmail.com> - 2012-05-31 13:40 -0700
      Re: unchecked conversion warning. Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-05-31 16:50 -0400
        Re: unchecked conversion warning. Lew <lewbloch@gmail.com> - 2012-05-31 17:18 -0700
        Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-06-01 08:14 +0200
          Re: unchecked conversion warning. Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-01 08:48 -0400
            Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-06-01 07:32 -0700
            Re: unchecked conversion warning. Roedy Green <see_website@mindprod.com.invalid> - 2012-06-10 12:16 -0700
              Re: unchecked conversion warning. Martin Gregorie <martin@address-in-sig.invalid> - 2012-06-10 22:08 +0000
                Re: unchecked conversion warning. Lew <noone@lewscanon.com> - 2012-06-10 17:09 -0700
                Re: unchecked conversion warning. Martin Gregorie <martin@address-in-sig.invalid> - 2012-06-11 01:31 +0000
        Re: unchecked conversion warning. Jim Janney <jjanney@shell.xmission.com> - 2012-06-01 08:41 -0600
          Re: unchecked conversion warning. Patricia Shanahan <pats@acm.org> - 2012-06-01 08:44 -0700
            Re: unchecked conversion warning. markspace <-@.> - 2012-06-01 09:08 -0700
            Re: unchecked conversion warning. Gene Wirchenko <genew@ocis.net> - 2012-06-01 09:31 -0700
            Re: unchecked conversion warning. Jim Janney <jjanney@shell.xmission.com> - 2012-06-01 11:02 -0600
            Re: unchecked conversion warning. Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-01 13:54 -0400
              Re: unchecked conversion warning. Patricia Shanahan <pats@acm.org> - 2012-06-01 16:44 -0700
                Re: unchecked conversion warning. Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-01 20:24 -0400
                Re: unchecked conversion warning. Patricia Shanahan <pats@acm.org> - 2012-06-01 19:36 -0700
          Re: natural/native language capabilities (was: unchecked conversion warning.) Jim Janney <jjanney@shell.xmission.com> - 2012-06-01 11:01 -0600
        Re: unchecked conversion warning. Roedy Green <see_website@mindprod.com.invalid> - 2012-06-10 12:13 -0700
        Re: unchecked conversion warning. Arne Vajhøj <arne@vajhoej.dk> - 2012-06-20 19:28 -0400
  Re: unchecked conversion warning. Broad Liyn <broadliyn@gmail.com> - 2012-06-10 21:52 -0700
    Re: unchecked conversion warning. Lew <noone@lewscanon.com> - 2012-06-10 23:50 -0700
    Re: unchecked conversion warning. Patricia Shanahan <pats@acm.org> - 2012-06-11 00:06 -0700
      Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-06-16 15:17 +0200
        Re: unchecked conversion warning. Lew <lewbloch@gmail.com> - 2012-06-18 12:28 -0700
          Re: unchecked conversion warning. Robert Klemme <shortcutter@googlemail.com> - 2012-06-19 23:14 +0200
            Re: unchecked conversion warning. Lew <lewbloch@gmail.com> - 2012-06-19 17:15 -0700
      Re: unchecked conversion warning. Arne Vajhøj <arne@vajhoej.dk> - 2012-06-20 19:22 -0400
    Re: unchecked conversion warning. Arne Vajhøj <arne@vajhoej.dk> - 2012-06-20 19:20 -0400

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