Patch with test for git pre-push hook when remote is already up to date; No stdin lines are generated

t5571-pre-push-hook.sh.diff

diff --git a/t/t5571-pre-push-hook.sh b/t/t5571-pre-push-hook.sh
index ac53d63869..edb619726e 100755
--- a/t/t5571-pre-push-hook.sh
+++ b/t/t5571-pre-push-hook.sh
@@ -19,14 +19,31 @@ test_expect_success 'setup' '
 	test_commit one &&
 	git push parent1 HEAD:foreign
 '
+
+COMMIT1="$(git rev-parse HEAD)"
+export COMMIT1
+
+write_script "$HOOK" <<'EOF'
+echo "$1" >actual
+echo "$2" >>actual
+cat >>actual
+EOF
+
+cat >expected <<EOF
+parent1
+repo1
+EOF
+
+test_expect_success 'push with no updates' '
+	git push parent1 master:foreign &&
+	diff expected actual
+'
+
 write_script "$HOOK" <<EOF
 cat >/dev/null
 exit 1
 EOF
 
-COMMIT1="$(git rev-parse HEAD)"
-export COMMIT1
-
 test_expect_success 'push with failing hook' '
 	test_commit two &&
 	test_must_fail git push parent1 HEAD