cabal bench and cabal test should allow passing arguments via trailing --

[jasagredo]

Only cabal run allows to pass arguments with:

cabal run <some-exe> -- <some args to the exe>

Not having this in cabal test is usually why users run the test-suites via cabal run. For passing options to cabal test one has to specify them in --test-options which can be complicated with quoting.

$ cabal test --help | grep option
...
 --test-options=TEMPLATES       give extra options to test executables (name
 --test-option=TEMPLATE         give extra option to test executables (no need
                                to quote options containing spaces, name
 --benchmark-options=TEMPLATES  give extra options to benchmark executables
 --benchmark-option=TEMPLATE    give extra option to benchmark executables (no
                                need to quote options containing spaces, name

It should be doable to make cabal test (and while we are at it also cabal bench) support trailing -- arguments. And perhaps those other flags could be removed/deprecated/hidden.

[michaelpj]

My immediate concern was "what about multiple test suites?", but --test-option has exactly the same problem, and I think cabal just feeds all the options to all the test suites, which would also be a perfectly reasonable behaviour for --.

[ulysses4ever]

This has been requested many times. The main ticket is #6198 Better keep the discussion in one place perhaps. There's also a POC PR referenced there.

[jasagredo]

Aha it is indeed a duplicate. Sorry for the noise.