An ATM Has Been Specified To Work In The Following Way?

⟩ An ATM has been specified to work in the following way?

An ATM has been specified to work in the following way:

Enter a card and if the card is invalid reject the card and exit system. If it is a valid card then enter a PIN number. Check to see if the PIN is invalid

– if it is then display a message ‘invalid pin number, please re-enter’. If 3 attempts are made with an invalid pin then the machine keeps the card. If it is a valid PIN then the user can select one of the following transactions:

• Cash Withdrawal without receipt

• Cash Withdrawal with receipt

• Balance Inquiry

• Statement request

• Cancel

What tests would you produce to test this application? State any assumptions when testing

Answer:

1. Invalid Card – reject card and exit

2. Valid Card and Invalid PIN – error message ‘invalid pin…’ (then enter valid pin)

3. Valid Card and Invalid PIN – error message ‘invalid pin…’ (then enter another 2 invalid Pins)

4. Valid Card, Valid Pin & Cancel (correct length pin)

5. Valid Card, Valid Pin in a large number – but the pin number contains more than the maximum number – should error

6. Valid Card, Valid Pin & Cash Withdraw without receipt

7. Valid Card, Valid Pin & Cash Withdraw with receipt

8. Valid Card, Valid Pin & Balance inquiry

9. Valid Card, Valid Pin & Statement Request

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