cgroups.bats: check cgroups_io_weight

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

tests/integration/cgroups.bats

@@ -132,7 +132,7 @@ function setup() {
 }
 
 @test "runc run (blkio weight)" {
-	requires cgroups_v2
+	requires cgroups_v2 cgroups_io_weight
 	[ $EUID -ne 0 ] && requires rootless_cgroup
 
 	set_cgroups_path

tests/integration/helpers.bash

@@ -451,6 +451,22 @@ function requires() {
 				skip_me=1
 			fi
 			;;
+		cgroups_io_weight)
+			local p f f2
+			init_cgroup_paths
+			if [ -v CGROUP_V1 ]; then
+				p="$CGROUP_CPU_BASE_PATH"
+				f1="blkio.weight"
+				f2="blkio.bfq.weight"
+			elif [ -v CGROUP_V2 ]; then
+				p="$CGROUP_BASE_PATH"
+				f1="io.weight"
+				f2="io.bfq.weight"
+			fi
+			if [ -z "$(find "$p" -type f \( -name "$f1" -o -name "$f2" \) -print -quit)" ]; then
+				skip_me=1
+			fi
+			;;
 		cgroupns)
 			if [ ! -e "/proc/self/ns/cgroup" ]; then
 				skip_me=1