runc kill: add kill -a test case

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

tests/integration/kill.bats

@@ -29,3 +29,19 @@ function teardown() {
 	runc delete test_busybox
 	[ "$status" -eq 0 ]
 }
+
+@test "kill --all KILL detached busybox" {
+	if [ $EUID -ne 0 ]; then
+		# kill --all requires working cgroups.
+		requires rootless_cgroup
+		# rootless containers have no cgroups configured by default.
+		set_cgroups_path
+	fi
+
+	runc run -d --console-socket "$CONSOLE_SOCKET" test_busybox
+	[ "$status" -eq 0 ]
+
+	runc kill -a test_busybox KILL
+	[ "$status" -eq 0 ]
+	wait_for_container 10 1 test_busybox stopped
+}