[Rd] if(--as-cran)?

[Duncan Murdoch]

On 04/09/2012 2:36 PM, Warnes, Gregory wrote:
> On 9/4/12 8:38 AM, "Duncan Murdoch" <murdoch.duncan at gmail.com> wrote:
>
>
> >On 04/09/2012 8:20 AM, Terry Therneau wrote:
> >>
> >> On 09/04/2012 05:00 AM, r-devel-request at r-project.org wrote:
> >> > The issue is not just about "CRAN" vs "off CRAN".
> >> > It is good to think about a more general scheme of
> >> > "light testing" vs "normal testing" vs "extensive testing",
> >> > e.g.,  for the situation where the package implements
> >> > (simulation/bootstrap/ ..) based inference, and the developer
> >> > (but not only) should be able to run the extensive tests.
> >> >
> >> > Martin
> >>
> >> I agree with Martin.  A mechanism to specify testing level would be the
> >>best.
> >> Then CRAN can choose to set that variable to "3" say, with level 1 for
> >>extensive and 2 for
> >> usual.
> >>     I'm quite willing to put up with the nuisance of print()
> >>enclosures.  I prefer it to
> >> having yet another way to subvert the evaluation model.
> >>
> >>     I'm a believer in testing everything possible in my packages, and
> >>wear it it as a badge
> >> of honor that the survival package has 4 lines of R code in the tests
> >>directory for every
> >> 3 in the R directory.  But CRAN only needs to run a small subset of
> >>this.
> >
> >We have a mechanism to specify testing level:  the --as-cran flag. We
> >could presumably make it more elaborate by adding other flags, or option
> >levels, or whatever.
> >
> >What I think we shouldn't do is try to create an R-level test that says
> >
> >  if (testingLevel() > 3) {
> >    doSomething
> >}
> >
> >because tests can be turned on and off, individually.  If testingLevel 3
> >specified tests (A, B, C), then is our testingLevel higher if we are
> >running tests (A, B, D, E, F, G)?  Why not just test for the presence of
> >whichever test is most relevant to that particular code block, e.g.
> >
> >  if ("D" %in% tests()) {
> >   doSomething
> >}
>
>
> I would prefer the testingLevel() approach of the "D" %in% tests()
> approach, since testingLevel() provides a natural way to add successively
> greater test details without having to dig into the code to determine the
> set of tests.

I don't see how you could possibly calculate a single number in a 
reasonable way.  What is the number that should be returned for (A, B, 
D, E, F, G)?

Duncan Murdoch