[Suggestion] Add Skip for t9020

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On February 21, 2019 15:00, I wrote:
> To: 'Junio C Hamano' <gitster@xxxxxxxxx>
> Cc: git@xxxxxxxxxxxxxxx; 'Johannes Schindelin'
> <johannes.schindelin@xxxxxx>; 'Duy Nguyen' <pclouds@xxxxxxxxx>
> Subject: RE: [ANNOUNCE] Git v2.21.0-rc2
> 
> On February 21, 2019 10:55, I wrote:
> > On February 20, 2019 14:42, Junio C Hamano wrote:
> > > "Randall S. Becker" <rsbecker@xxxxxxxxxxxxx> writes:
> > >
> > > > On February 19, 2019 18:29, Junio C Hamano wrote:
> > > >> A release candidate Git v2.21.0-rc2 is now available for testing
> > > >> at the usual places.  It is comprised of 474 non-merge commits
> > > >> since v2.20.0, contributed by 61 people, 16 of which are new faces.
> > > >
> > > > Thanks. t5562 works properly on NonStop (3 tests under various
loads).
> > > > I am starting a full regression test now - see you in two days or
> > > > so with a full report.
> > >
> > > Thanks.  In the end I ended up doing the following:
> > >
> > >  - kept most of your "feed NULs generated from a helper program via
> > >    pipe, instead of reading from /dev/zero" patch,
> > >
> > >  - replaced the helper program used in the above with the test-tool
> > >    one by Dscho,
> > >
> > >  - used Max's "do not reuse the output file---the background writer
> > >    about to die may still have it open when the next test starts",
> > >
> > >  - used Max's "when testing the program with overly large input
> > >    declared with content-length, do not have to feed from /dev/zero;
> > >    /dev/null suffices as a mistaken program attempting to read would
> > >    die when seeing EOF anyway" patch to reduce one mention of
> > >    /dev/zero (or one pipe from the helper output) further.
> > >
> > > Hopefully Dscho's Azure thing would also be happy with one less use
> > > of Perl script.
> > >
> > > As I said earlier, a few places in t/ still mention /dev/zero and I
> > > think it is a real bug on platforms without /dev/zero in t4153:
> > >
> > >     $ git grep -h dev/zero t/
> > >             test_must_fail test_terminal git am --3way </dev/zero &&
> > >             test_must_fail test_terminal git am --reject </dev/zero
> > > &&
> > >
> > > Curiously, applying the attached patch and running the test on Linux
> > > would notice that we do not have such a device file, and the use of
> > > test_must_fail does *not* make it a-OK [*].  I am not sure why you
> > > are not getting hit by the same issue.
> > >
> > > 	Side note: test_must_fail is to ensure that the command
> > > 	exits in a controlled way without segfault, so at the first
> > > 	glance, replacing /dev/zero with something nonsensical and
> > > 	nonexistent ought to make the command pass, but that is not
> > > 	the case.  The shell notices redirection failure and aborts
> > > 	the &&-chain.  This behaviour matches what we want, so I
> > > 	won't complain ;-)
> > >
> > > Another mention of /dev/zero appears in t/helper/test-sha1.sh (not
> > > to be confused with t/helper/test-sha1.c).  This seems to be run
> > > only with an explicit "make -C t/helper check-sha1" request, so
> > > perhaps nobody on your platform ran it to get hit by it.  I wonder
> > > if anybody runs this on any platform, to be honest, though.  Duy
> > > Cc'ed as the last person to touch that particular target---yes, I
> > > know I was guilty of introducing it in b65bc21e ("Makefile: add
> > > framework to verify and
> > bench sha1 implementations.", 2006-06-24).
> > >
> > >  t/t4153-am-resume-override-opts.sh | 4 ++--
> > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/t/t4153-am-resume-override-opts.sh b/t/t4153-am-resume-
> > > override-opts.sh index 8ea22d1bcb..29ef22c94f 100755
> > > --- a/t/t4153-am-resume-override-opts.sh
> > > +++ b/t/t4153-am-resume-override-opts.sh
> > > @@ -40,7 +40,7 @@ test_expect_success TTY '--3way overrides --no-
> > 3way' '
> > >
> > >  	# Applying side1 with am --3way will succeed due to the threeway-
> > > merge.
> > >  	# Applying side2 will fail as --3way does not apply to it.
> > > -	test_must_fail test_terminal git am --3way </dev/zero &&
> > > +	test_must_fail test_terminal git am --3way </dev/zarro &&
> > >  	test_path_is_dir .git/rebase-apply &&
> > >  	test side1 = "$(cat file2)"
> > >  '
> > > @@ -94,7 +94,7 @@ test_expect_success TTY '--reject overrides --no-
> > reject'
> > > '
> > >  	test_path_is_dir .git/rebase-apply &&
> > >  	test_path_is_missing file.rej &&
> > >
> > > -	test_must_fail test_terminal git am --reject </dev/zero &&
> > > +	test_must_fail test_terminal git am --reject </dev/zarro &&
> > >  	test_path_is_dir .git/rebase-apply &&
> > >  	test_path_is_file file.rej
> > >  '
> >
> > Here's what we get with this patch (and without it):
> >
> > /home/git/git/t: sh t4153-am-resume-override-opts.sh ok 1 - setup ok 2
> > # skip --3way overrides --no-3way (missing TTY) ok 3 - --no-quiet
> > overrides
> --
> > quiet ok 4 - --signoff overrides --no-signoff ok 5 # skip --reject
> overrides --
> > no-reject (missing TTY) # passed all 5 test(s)
> > 1..5
> >
> > Technically, we have TTY, but not that dev. The TTYs are not under
> /dev/tty*,
> > however.
> 
> t9020 subtests 1,2,5,6 failed - Not new. unsurprising as there is no SVN
or
> perl with SVN module on platform. It might be useful to have a detection
to
> skip of Perl SVN is not present.

While this is a bit of a hack, it might be useful for skipping t9020 in
environments where the svn.remote package is not installed. I can make this
into a patch if this style is reasonable - guessing probably not and that
the REMOTE_SVN test should go elsewhere if it is called that.

diff --git a/t/t9020-remote-svn.sh b/t/t9020-remote-svn.sh
index 6fca08e5e3..31edf99371 100755
--- a/t/t9020-remote-svn.sh
+++ b/t/t9020-remote-svn.sh
@@ -12,6 +12,12 @@ then
        test_done
 fi

+python -c "import svn.remote" 2>/dev/null >/dev/null
+if [ $? -eq 0 ]; then
+       test_set_prereq REMOTE_SVN
+fi
+if ! test_have_prereq REMOTE_SVN
+then
+       skip_all='skipping remote-svn tests, python svn.remote not
available'
+       test_done
+fi
+

# Override svnrdump with our simulator
 PATH="$HOME:$PATH"
 export PATH PYTHON_PATH GIT_BUILD_DIR




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