add integration test for ps/kill after the container stopped

Signed-off-by: lifubang <lifubang@acmcoder.com>

tests/integration/kill.bats

@@ -25,6 +25,10 @@ function teardown() {
 
   retry 10 1 eval "__runc state test_busybox | grep -q 'stopped'"
 
+  # we should ensure kill work after the container stopped
+  runc kill -a test_busybox 0
+  [ "$status" -eq 0 ]
+
   runc delete test_busybox
   [ "$status" -eq 0 ]
 }

tests/integration/ps.bats

@@ -60,3 +60,27 @@ function teardown() {
   [[ ${lines[0]} =~ \ +PID\ +TTY\ +STAT\ +TIME\ +COMMAND+ ]]
   [[ "${lines[1]}" =~ [0-9]+ ]]
 }
+
+@test "ps after the container stopped" {
+  # ps requires cgroups
+  [[ "$ROOTLESS" -ne 0 ]] && requires rootless_cgroup
+  set_cgroups_path "$BUSYBOX_BUNDLE"
+
+  # start busybox detached
+  runc run -d --console-socket $CONSOLE_SOCKET test_busybox
+  [ "$status" -eq 0 ]
+
+  # check state
+  testcontainer test_busybox running
+
+  runc ps test_busybox
+  [ "$status" -eq 0 ]
+
+  runc kill test_busybox KILL
+  [ "$status" -eq 0 ]
+
+  retry 10 1 eval "__runc state test_busybox | grep -q 'stopped'"
+
+  runc ps test_busybox
+  [ "$status" -eq 0 ]
+}