[Buildroot] [PATCH] support/tests: allow properly indented config fragment

[Yann E. MORIN]

Arnout, All,

On 2017-07-18 21:37 +0200, Arnout Vandecappelle spake thusly:
> On 16-07-17 00:49, Yann E. MORIN wrote:
> > Currently, defining a config fragment in the runtime test infra requires
> > that the fragment not to be indented. This is beark, and causes grievance
> > when looking at the code (e.g. to fix it).
> > 
> > Just strip out all leading spaces/tabs when writing the configuration
> > lines into the config file.
> > 
> > Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
> > Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> > ---
> >  support/testing/infra/builder.py | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/support/testing/infra/builder.py b/support/testing/infra/builder.py
> > index a475bb0a30..81735dec96 100644
> > --- a/support/testing/infra/builder.py
> > +++ b/support/testing/infra/builder.py
> > @@ -16,7 +16,8 @@ class Builder(object):
> >  
> >          config_file = os.path.join(self.builddir, ".config")
> >          with open(config_file, "w+") as cf:
> > -            cf.write(self.config)
> > +            for line in self.config.splitlines():
> > +                cf.write("{}\n".format(line.lstrip()))
> 
>  I like nitpicking :-)

Please nit-pick, python is not my cup of tea, you know well! ;-)

>  I would do this in BRTest instead of down here, so that self.config contains a
> correct config file. In fact, I would do it in its constructor instead of in
> setUp(), so that it is done only once even if a class has two test functions.

Meh, I have no real clue on how those class- or instance-scoped
variables play iwth each others... I think this is sad that we use
class-scoped config variable for the actual tests; they should be
instance-scoped instead, but that requires one to actually write an
__init__ function, so a classscoped is quicker to write.

Be if we ever want to derive a Test class into another, then we'll have
issues I guess...

But if I understand you correctly, you'd prefer (code elided for
brevity):

    class BRTest():
        def __init__(self):
            self.config = '\n'.join(map(str.lstrip, self.config.splitlines()))

Right?

>  I would also do it as a oneliner:
> 	self.config = '\n'.join(map(str.lstrip, self.config.splitlines()))
> but some people don't like oneliners :-)

Well, I prefer it, because it is rather self-explanatory. But I could
not have wrote it myself (I did not know about map() ).

Thanks!

Regards,
Yann E. MORIN.

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