Re: For those who switched from Mocks to Fakes/Stubs/Spies, why did you do that? (was Re: What is testable? (was Re: Is it OK to add code to a class *only* to improve its testability...))
Adam Sroka <adam.sroka <at> gmail.com>
2010-03-01 01:57:15 GMT
I don't know about lines of code, but it makes sense if we look at the
number of unique objects. The upper bound would be O(n!) combinations if the
object graph were strongly connected (i.e. each object has a direct
relationship to every other object in the system.) Minimally no object would
have a direct relationship to more than a single other object. That would be
O(n). The average is somewhere between those (I would estimate about O(n^2)
but I haven't tried to prove it.) Remember that relationships between
objects are directional.
On Sun, Feb 28, 2010 at 5:34 PM, J. B. Rainsberger <jbrains762 <at> gmail.com>wrote:
>
>
> On Fri, Feb 26, 2010 at 8:28 AM, Sebastian <paymentexpert <at> yahoo.de<paymentexpert%40yahoo.de>>
> wrote:
>
> > sorry, this is a little bit off topic but in your presentation
> "Integration Tests are a Scam" you said that the number of tests required to
> cover a certain amount of code would increase with the factorial of the
> lines of code under test.
> > How do you get to this result?
>
> I don't remember saying "the factorial of the lines of code under
> test", because I don't think that's right. I might have said it, but
> if I did, I regret saying it.
>
> The number of tests required to cover a system is combinatoric over
> the code paths in each layer. In other words, if your layers have 2,
> 4, 8, 6, 2, 3, and 7 codepaths respectively, then you need
> approximately 2*4*8*6*2*3*7 tests.
(Continue reading)
Thanks, -- Franz Allan Valencia See | Java Software Engineer franz.see <at> gmail.com LinkedIn: http://www.linkedin.com/in/franzsee Twitter: http://www.twitter.com/franz_see On Fri, Feb 26, 2010 at 9:48 PM, Josue Barbosa dos Santos < josuesantos <at> gmail.com> wrote: > On Thu, Feb 25, 2010 at 11:35 PM, Franz Allan Valencia See > > How about displaying info in the UI? > > > > i.e. Viewing of personal information in a webapp from a data source. And > if > > there are layering, then each layer would probably have to ask for that > > information till the presentation layer gets it. > > > > WDYT? > > I think if you use a MVP pattern, for example, the presenter will tell de > UI > de information. I am working with GWT and this is possible in that > framework (and one of others reasons that I like GWT so much.). I think > that > is not always possible in all views/presentation frameworks. >
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