reflog tests: test for the "points nowhere" warning

The "git reflog expire" command when given an unknown reference has
since 4264dc15e1 ("git reflog expire", 2006-12-19) when this command
was implemented emit an error, but this has never been tested for.

Let's test for it, also under gc.reflogExpire{Unreachable,}=never in
case a future change is tempted to take shortcuts in the presence of
such config.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t1410-reflog.sh b/t/t1410-reflog.sh
index 42f5ac9ed95064053b9d1499038f593d009d903c..e8f8ac9785609060f52186dab5def9391b51da38 100755 (executable)
--- a/t/t1410-reflog.sh
+++ b/t/t1410-reflog.sh
@@ -250,6 +250,16 @@ test_expect_success 'gc.reflogexpire=false' '
 
 '
 
+test_expect_success 'git reflog expire unknown reference' '
+       test_config gc.reflogexpire never &&
+       test_config gc.reflogexpireunreachable never &&
+
+       test_must_fail git reflog expire master@{123} 2>stderr &&
+       test_i18ngrep "points nowhere" stderr &&
+       test_must_fail git reflog expire does-not-exist 2>stderr &&
+       test_i18ngrep "points nowhere" stderr
+'
+
 test_expect_success 'checkout should not delete log for packed ref' '
        test $(git reflog master | wc -l) = 4 &&
        git branch foo &&