[PATCH] rebase: mark a test as failing with rebase.useBuiltin=false

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Mark a test added in 04519d7201 ("rebase: validate -C<n> and
--whitespace=<mode> parameters early", 2018-11-14) as only succeeding
with the builtin version of rebase. It would be nice if the
shellscript version had the same fix, but it's on its way out, and the
author is not interested in fixing it[1].

This makes the entire test suite pass again with the
GIT_TEST_REBASE_USE_BUILTIN=false mode added in my 62c23938fa ("tests:
add a special setup where rebase.useBuiltin is off", 2018-11-14).

1. https://public-inbox.org/git/nycvar.QRO.7.76.6.1811201157170.41@tvgsbejvaqbjf.bet/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---

On Tue, Nov 20 2018, Johannes Schindelin wrote:

> [...]
> Maybe you can concoct a prereq for this test? Something like
>
> test_lazy_prereq BUILTIN_REBASE '
>       test true = "${GIT_TEST_REBASE_USE_BUILTIN:-true}"
> '

It's better to just mark the test as needing the prereq turned
off. E.g. this is what we do for the split index tests & now for the
gettext tests. That way we always run the test, but just indicate that
it relies on GIT_TEST_REBASE_USE_BUILTIN being unset.

 t/t3406-rebase-message.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/t/t3406-rebase-message.sh b/t/t3406-rebase-message.sh
index 38bd876cab..77e5bbb3d5 100755
--- a/t/t3406-rebase-message.sh
+++ b/t/t3406-rebase-message.sh
@@ -84,7 +84,8 @@ test_expect_success 'rebase --onto outputs the invalid ref' '
 	test_i18ngrep "invalid-ref" err
 '
 
-test_expect_success 'error out early upon -C<n> or --whitespace=<bad>' '
+test_expect_success 'builtin rebase: error out early upon -C<n> or --whitespace=<bad>' '
+	sane_unset GIT_TEST_REBASE_USE_BUILTIN &&
 	test_must_fail git rebase -Cnot-a-number HEAD 2>err &&
 	test_i18ngrep "numerical value" err &&
 	test_must_fail git rebase --whitespace=bad HEAD 2>err &&
-- 
2.20.0.rc0.387.gc7a69e6b6c