[Haskell-cafe] The State of Testing?

[Austin Seipp]

If you're writing a library, you need to compile the library with
`-fhpc`, i.e. put it in the library stanza, not the testsuite stanza,
and then you can compile the test program using your library - the
resulting 'tix' file will contain the library coverage reports. You
can link a HPC-built library into an executable not compiled with HPC
just fine.

Normally I only compile the library under HPC mode, link it in a test,
and distribute the results from that. That way your coverage reports
don't include the test module (which may or may not be relevant.)

I normally add a cabal flag called 'hpc' which optionally enables
coverage reports for my library, e.g.

flag hpc
  default: False

library
  ...
  ...
  if flag(hpc)
    ghc-options: -fhpc

Then when you want coverage reports, just say 'cabal install -fhpc
--enable-tests' and the resulting properties executable will spit out
the results when run.

On Tue, Feb 7, 2012 at 3:16 PM, Michael Craig <mkscrg at gmail.com> wrote:
> Thanks for the advice, all. I've got test-framework, quickcheck, and cabal's
> test-suite all working together nicely.
>
> Cabal seems to support using hpc to check test coverage. If I add -fhpc to
> the ghc-options under the test-suite, I get output like "Test coverage
> report written to dist/hpc/html/tests/hpc_index.html" and "Package coverage
> report written to dist/hpc/html/test-0.0.0/hpc_index.html", but those html
> files are just empty tables. How does this work?
>
> Mike Craig
>
>
>
>
> On Thu, Feb 2, 2012 at 8:45 PM, Ivan Lazar Miljenovic
> <ivan.miljenovic at gmail.com> wrote:
>>
>> On 03/02/2012 12:22 PM, "Johan Tibell" <johan.tibell at gmail.com> wrote:
>> >
>> > On Thu, Feb 2, 2012 at 4:46 PM, Conrad Parker <conrad at metadecks.org>
>> > wrote:
>> >>
>> >> On 3 February 2012 08:30, Johan Tibell <johan.tibell at gmail.com> wrote:
>> >> > On Thu, Feb 2, 2012 at 4:19 PM, Conrad Parker <conrad at metadecks.org>
>> >> > wrote:
>> >> >>
>> >> >> I've followed what Johan Tibbell did in the hashable package:
>> >> >
>> >> >
>> >> > If I had known how much confusion my childhood friends would unleash
>> >> > on the
>> >> > Internet when they, at age 7, gave me a nickname that's spelled
>> >> > slightly
>> >> > differently from my last name, I would have asked them to pick
>> >> > another one.
>> >> > ;)
>> >>
>> >> lol, sorry, I actually double-checked the number of l's before writing
>> >> that but didn't consider the b's. For future reference I've produced a
>> >> handy chart:
>> >>
>> >>
>> >>
>> >> Letter | Real-name count | Nickname count
>> >> -------+-----------------+---------------
>> >> b      | 1               | 2
>> >> l      | 2               | 0
>> >> -------+-----------------+---------------
>> >> SUM    | 3               | 2
>> >>
>> >
>> > Excellent. I will tattoo it on my forehead.
>>
>> There is, of course, a simpler (but not necessarily easier :p) solution:
>> change your name to match your nickname!
>>
>> >
>> >
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>> >
>>
>>
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>
>
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-- 
Regards,
Austin