Finish ApplicationController Testing
Replace assert with assertThat
Refactor to firstly save the event, then save its dispatches
Finish CallOperatorTesting class
Finish CallOperatorTesting class with all the method commented out
Debug, return results instead of eventNode
Refactor to return the notification of exception message
Debug, return results instead of eventNode
Refactor the error output
Finish AgencyOperatorTestig class
Finish AgencyOperatorTestig class with all the method commented it out
Add in the code to init the Dispatch status to Sent
Add the code to return error message if the event ID is not valid
Finish ServiceOperatorTesting except the usage of third party library