Setup System: 1. Use docker-compose to setup the TrainTicket system. Failure Triggering Usage Steps: 1. Log in. 2. Select date and click [Search]. Remeber to select high-speed train. 3. Select one Train-Number and click [Book]. 4. Select one contacts and click [Select]. 5. Click [Confirm Ticket] twice quickly and wait for the result. 6. If there is no fault occurs, you will receive two [SUCCESS]. Or you will receive [Something Wrong]. Failure Triggering Test Case: There is only one test case in ts-ui-test, named [TestFlowOne]. Just run it and it will do as fault reproduce failure triggering usage steps mentioned above.