Re: [PATCH v2] tests: add initial bash completion tests

["SZEDER Gábor" <szeder@ira.uka.de>]

On Tue, Apr 17, 2012 at 09:32:29AM +0300, Felipe Contreras wrote:
> On Tue, Apr 17, 2012 at 3:31 AM, SZEDER Gábor <szeder@fzi.de> wrote:
> > Hi,
> >
> >
> > I picked up Stephen Boyd's two-patch series[1] to use parse-options to
> > generate options for git commands, and the following test promply
> > failed (taken from 5c293a6b (tests: add initial bash completion tests,
> > 2012-04-12)):
> >
> > test_expect_success 'double dash "git checkout"' '
> >        sed -e "s/Z$//" >expected <<-\EOF &&
> >        --quiet Z
> >        --ours Z
> >        --theirs Z
> >        --track Z
> >        --no-track Z
> >        --merge Z
> >        --conflict=
> >        --orphan Z
> >        --patch Z
> >        EOF
> >        test_completion "git checkout --"
> > '
> >
> > Not surprising, the completion script doesn't know about many 'git
> > checkout' long options.  So whenever 'git checkout' learns a new long
> > option, this list must be updated.  This won't be more work than the
> > update of the completion script, so this is probably OK.
> >
> > But it got me thinking about what do we actually want to test here?
> > Whether the completion script returns the right long options in a
> > specific order upon 'git checkout --<TAB>'?  Or whether _git() works
> > properly and invokes the right command-specific completion function?
> > Or whether regular options get a trailing space while options
> > expecting an argument don't?  Or is this sort of an integration test
> > and basically all of the above?
> 
> I don't think the order is relevant, just that all the options are
> there, 

The order of options is not relevant in the completion script, because
Bash will sort them alphabetically anyway.  But it is relevant in the
test: it fails if the order is changed either in the completion script
or in the test.

> and the ones with arguments have a = in there, and the ones
> that don't, a space.

Couldn't we check that better with a test or two for __gitcomp()?

If a test for __gitcomp() fails, we would immediately have a fairly
good idea where to look for the cause of the breakage.  However, if
this 'double dash "git checkout"' test fails, there are a bunch of
other things that can possibly cause the failure.

Patch comes in a minute.

Best,
Gábor