t5516-fetch-push: fix 'push with dry-run' test

In a while-at-it cleanup replacing a 'cd dir && <...> && cd ..' with a
subshell, commit 28391a80a9 (receive-pack: allow deletion of corrupt
refs, 2007-11-29) also moved the assignment of the $old_commit
variable to that subshell.  This variable, however, is used outside of
that subshell as a parameter of check_push_result(), to check that a
ref still points to the commit where it is supposed to.  With the
variable remaining unset outside the subshell check_push_result()
doesn't perform that check at all.

Use 'git -C <dir> cmd...', so we don't need to change directory, and
thus don't need the subshell either when setting $old_commit.

Furthermore, change check_push_result() to require at least three
parameters (the repo, the oid, and at least one ref), so it will catch
similar issues earlier should they ever arise.

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

diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh
index 177897ea0b1e00cc4ec0f0e43510411ab19f1681..0ed3ad0c7b4994acd12327e013ba359a41981738 100755 (executable)
--- a/t/t5516-fetch-push.sh
+++ b/t/t5516-fetch-push.sh
@@ -94,6 +94,9 @@ mk_child() {
 }
 
 check_push_result () {
+       test $# -ge 3 ||
+       error "bug in the test script: check_push_result requires at least 3 parameters"
+
        repo_name="$1"
        shift
 
@@ -553,10 +556,7 @@ test_expect_success 'branch.*.pushremote config order is irrelevant' '
 test_expect_success 'push with dry-run' '
 
        mk_test testrepo heads/master &&
-       (
-               cd testrepo &&
-               old_commit=$(git show-ref -s --verify refs/heads/master)
-       ) &&
+       old_commit=$(git -C testrepo show-ref -s --verify refs/heads/master) &&
        git push --dry-run testrepo : &&
        check_push_result testrepo $old_commit heads/master
 '