lxd - Add 4A0B test, didn't pass
lxd - Add naive implementation, make test pass
lxd - Add 0A0B test, passed directly
lxd - Add 0A4B test, didn't pass
lxd - Refacor; Add implementation, didn't pass
lxd - Modify implementation, make test passed
lxd - Refactor
lxd - Add more test, passed directly