Question $1.[30$ points$]$

Below figure shows the dynamic behavior of a simplified airline booking system. The state machine consists of $5$ states with events to transit from one state to another. Study this state machine and then examine the attached implementation details of the airline booking state machine $($Booking$.$java$).$

Using the Junit testing framework, you are required to do the following:

Create a test case$($s$)$ for this state machine to cover all possible transitions and verify the implementation of the attached Java file $($Booking$.$java$).$

$[20$ points$]$

Now, intentionally we have introduced two faults that will result in a failure of the airline state machine behavior. Using your previous tests, apply them on the faulty Java file $($Booking$-$Fault.java$)$ and examine if your tests caught the error. Present a picture of the failed test cases and the faults location. $[10$ points$]$

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