[PATCH v3] t/pack-refs-tests: use test_path_is_missing

[jayesh0104 <jayeshdaga99@gmail.com>]

Replace the raw file existence check:

    ! test -f .git/refs/heads/f

with the Git test helper:

    test_path_is_missing .git/refs/heads/f

This aligns the test with Git’s testing conventions and avoids
direct use of shell test constructs.

v3:
- Fix commit message to accurately describe the change

Signed-off-by: jayesh0104 <jayeshdaga99@gmail.com>
---
 t/pack-refs-tests.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/pack-refs-tests.sh b/t/pack-refs-tests.sh
index 2fdaccb6c7..4a85d96c6b 100644
--- a/t/pack-refs-tests.sh
+++ b/t/pack-refs-tests.sh
@@ -61,7 +61,7 @@ test_expect_success 'see if a branch still exists after git ${pack_refs} --prune
 test_expect_success 'see if git ${pack_refs} --prune remove ref files' '
 	git branch f &&
 	git ${pack_refs} --all --prune &&
-	! test -f .git/refs/heads/f
+	test_path_is_missing .git/refs/heads/f
 '
 
 test_expect_success 'see if git ${pack_refs} --prune removes empty dirs' '
-- 
2.43.0