Add test case for read_arrange_mode()
Add test case for read_arrange_mode()

SWLBot/electronic-blackboard,stvreumi/electronic-blackboard,stvreumi/electronic-blackboard,SWLBot/electronic-blackboard,chenyang14/electronic-blackboard,Billy4195/electronic-blackboard,SWLBot/electronic-blackboard,chenyang14/electronic-blackboard,stvreumi/electronic-blackboard,stvreumi/electronic-blackboard,SWLBot/electronic-blackboard,Billy4195/electronic-blackboard,chenyang14/electronic-blackboard,Billy4195/electronic-blackboard,Billy4195/electronic-blackboard