Setup System:

1. Use docker-compose to setup the TrainTicket system.
2. Log in and make sure that there is at least one ticket order that fits the following:
   (1) The train number starts with Z or K.
   (2) The order status is PAID.


Failure Triggering Usage Steps:

1. Log in.
2. Click [Flow Two - Ticket Cancel & Ticket Change].
3. Click [Refresh Orders].
4. Select the order mentioned above and click [Cancel Order].
5. Click [Confirm Cancel].
6. You will get result of cancel. If you get SUCCESS, it means the fault does not occur.
                                  If you get WRONG, it means the fault occurs, and you will see the exception logs on the server console.


Failure Triggering Test Case:

There is only one test case in ts-ui-test, named [TestFlowTwoCancel.java].
Just run it and it will do as failure triggering usage steps mentioned above.