integration: add userns and checkpoint integration test

Signed-off-by: Efim Verzakov <efimverzakov@gmail.com>

Author: everzakov

tests/integration/userns.bats

@@ -280,3 +280,25 @@ function teardown() {
 	# is deleted during the namespace cleanup.
 	run ! ip link del dummy0
 }
+
+@test "checkpoint userns container with non default host id" {
+	requires criu root
+
+	runc run -d --console-socket "$CONSOLE_SOCKET" test_busybox
+	[ "$status" -eq 0 ]
+
+	testcontainer test_busybox running
+
+	runc checkpoint --work-path ./work-dir test_busybox
+	[ "$status" -eq 0 ]
+
+	testcontainer test_busybox checkpointed
+
+	# we need to chown images because child process can try to read them.
+	chown -R 100000:200000 ./checkpoint
+
+	runc restore -d --work-path ./work-dir --console-socket "$CONSOLE_SOCKET" test_busybox
+	[ "$status" -eq 0 ]
+
+	testcontainer test_busybox running
+}