tests/int: add check for hugetlb stats

As promised in

	opencontainers/cgroups#24 (review)

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

tests/integration/events.bats

@@ -87,6 +87,20 @@ function test_events() {
 	done
 }
 
+# See https://github.com/opencontainers/cgroups/pull/24
+@test "events --stats with hugetlb" {
+	requires cgroups_v2 cgroups_hugetlb
+	init_cgroup_paths
+
+	runc run -d --console-socket "$CONSOLE_SOCKET" test_busybox
+	[ "$status" -eq 0 ]
+
+	runc events --stats test_busybox
+	[ "$status" -eq 0 ]
+	# Ensure hugetlb node is present.
+	jq -e '.data.hugetlb // empty' <<<"${lines[0]}"
+}
+
 @test "events --interval default" {
 	test_events
 }