[Haskell-cafe] Re: Problems with Haskell Program Coverage
Dominic Steinitz
dominic at steinitz.org
Sat Apr 25 04:23:51 EDT 2009
Malcolm Wallace <Malcolm.Wallace <at> cs.york.ac.uk> writes:
>
> Dominic Steinitz <dominic.steinitz <at> blueyonder.co.uk> wrote:
>
> > I want to use hpc to check that the ASN.1 library tests cover all the
> > code. When I run it with a set of tests that I *know* don't test
> > certain things, it reports that they have been covered i.e. there are
> > not coloured in the markup that hpc produces. I would have expected a
> > lot of yellow.
>
> The record of coverage is cumulative across multiple runs. Is it
> possible that you did not remove an old .tix file before running the
> tests?
Thanks for your reply I was beginning to worry I might be the only person trying
to use this.
I've done a bit of investigation and it seems there are at least two problems:
1. I have literate haskell files (.lhs).
2. Even if I run them through the pre-processor (ghc -E) they still don't work
but if I manually remove these lines (which seem to get inserted by the
pre-processor)
{-# LINE 1 "ASNTYPE.lhs" #-}
#line 1 "ASNTYPE.lhs"
then it does actually work.
It looks like a bug to me. I guess I should report it on the ghc trac.
I still have a problem with another project which doesn't use literate haskell
but does require the use of -cpp and has got #ifdef's. I haven't got to the
bottom of it yet but I'm suspicious that lines starting with # cause hpc to
misbehave.
It's strange that hpc should behave like this as I would have thought it
wouldn't care about hs / lhs and # as ghc would have done some of its standard
processing before hpc got engaged.
Dominic.
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