test: require unified cgroup hierarchy for TEST-56

since cgroup empty notifications are unreliable in legacy cgroups.

See: systemd/systemd#22320
Complements: systemd/systemd#22344

diff --git a/test/TEST-56-EXIT-TYPE/test.sh b/test/TEST-56-EXIT-TYPE/test.sh
index 0f84dca1ba66e5a1e4f9a27ce2f0b511a9ccd687..37475e817e1028a67d27cb9bdaec9290bf728203 100755 (executable)
--- a/test/TEST-56-EXIT-TYPE/test.sh
+++ b/test/TEST-56-EXIT-TYPE/test.sh
@@ -6,4 +6,9 @@ TEST_DESCRIPTION="test ExitType=cgroup"
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
+if [[ "$(get_cgroup_hierarchy)" != unified ]]; then
+    echo "This test requires unified cgroup hierarchy, skipping..."
+    exit 0
+fi
+
 do_test "$@"