completion tests: check __gitdir()'s output in the error cases

The __gitdir() helper function shouldn't output anything if not in a
git repository.  The relevant tests only checked its error code, so
extend them to ensure that there's no output.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index 030a16e778ffb3bdb361f0d6a1c7fa0f4d074d88..f7f7d49fba9aff7f5a4791ad684623ba864dfb5f 100755 (executable)
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -215,8 +215,9 @@ test_expect_success '__gitdir - non-existing $GIT_DIR' '
        (
                GIT_DIR="$ROOT/non-existing" &&
                export GIT_DIR &&
-               test_must_fail __gitdir
-       )
+               test_must_fail __gitdir >"$actual"
+       ) &&
+       test_must_be_empty "$actual"
 '
 
 test_expect_success '__gitdir - gitfile in cwd' '
@@ -255,7 +256,8 @@ test_expect_success SYMLINKS '__gitdir - resulting path avoids symlinks' '
 '
 
 test_expect_success '__gitdir - not a git repository' '
-       nongit test_must_fail __gitdir
+       nongit test_must_fail __gitdir >"$actual" &&
+       test_must_be_empty "$actual"
 '
 
 test_expect_success '__gitcomp - trailing space - options' '