| Use Case | Function Being Tested | Initial System State | Input | Expected Output |
|---|
| System Startup |
System is started when the switch is turned "on" |
System is off |
Activate the "on" switch |
System requests initial cash amount |
| System Startup |
System accepts initial cash amount |
System is requesting cash amount |
Enter a legitimate amount |
System is on |
| System Startup |
Connection to the bank is established |
System has just been turned on |
Perform a legitimate inquiry transaction |
System output should demonstrate that a connection has been established to the Bank |
| System Shutdown |
System is shut down when the switch is turned "off" |
System is on and not servicing a customer |
Activate the "off" switch |
System is off |
| System Shutdown |
Connection to the Bank is terminated when the system is shut down |
System has just been shut down |
|
Verify from the bank side that a connection to the ATM no longer exists |
| Session |
System reads a customer's ATM card |
System is on and not servicing a customer |
Insert a readable card |
Card is accepted;
System asks for entry of PIN |
| Session |
System rejects an unreadable card |
System is on and not servicing a customer |
Insert an unreadable card |
Card is ejected;
System displays an error screen;
System is ready to start a new session |
| Session |
System accepts customer's PIN |
System is asking for entry of PIN |
Enter a PIN |
System displays a menu of transaction types |
| Session |
System allows customer to perform a transaction |
System is displaying menu of transaction types |
Perform a transaction |
System asks whether customer wants another transaction |
| Session |
System allows multiple transactions in one session |
System is asking whether customer wants another transaction |
Answer yes |
System displays a menu of transaction types |
| Session |
Session ends when customer chooses not to do another transaction |
System is asking whether customer wants another transaction |
Answer no |
System ejects card and is ready to start a new session |
| Transaction |
Individual types of transaction will be tested below |
|
|
|
| Transaction |
System handles an invalid PIN properly |
A readable card has been entered |
Enter an incorrect PIN and then attempt a transaction |
The Invalid PIN Extension is performed |
| Withdrawal |
System asks customer to choose an account to withdraw from |
Menu of transaction types is being displayed |
Choose Withdrawal transaction |
System displays a menu of account types |
| Withdrawal |
System asks customer to choose a dollar amount to withdraw |
Menu of account types is being displayed |
Choose checking account |
System displays a menu of possible withdrawal amounts |
| Withdrawal |
System performs a legitimate withdrawal transaction properly |
System is displaying the menu of withdrawal amounts |
Choose an amount that the system currently has and which is not greater than
the account balance |
System dispenses this amount of cash;
System prints a correct receipt showing amount and correct updated balance;
System records transaction correctly in the log (showing both message to the bank
and approval back) |
| Withdrawal |
System verifies that it has sufficient cash on hand to fulfill the request |
System has been started up with less than the maximum withdrawal amount in cash on hand;
System is requesting a withdrawal amount |
Choose an amount greater than what the system currently has |
System displays an appropriate message and asks customer to choose a different amount |
| Withdrawal |
System verifies that customer's balance is sufficient to fulfill the request |
System is requesting a withdrawal ammount |
Choose an amount that the system currently has but which is greater than
the account balance |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Withdrawal |
A withdrawal transaction can be cancelled by the customer any time prior to choosing
the dollar amount |
System is displaying menu of account types |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Withdrawal |
A withdrawal transaction can be cancelled by the customer any time prior to choosing
the dollar amount |
System is displaying menu of dollar amounts |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Deposit |
System asks customer to choose an account to deposit to |
Menu of transaction types is being displayed |
Choose Deposit transaction |
System displays a menu of account types |
| Deposit |
System asks customer to enter a dollar amount to deposit |
Menu of account types is being displayed |
Choose checking account |
System displays a request for the customer to type a dollar amount |
| Deposit |
System asks customer to insert an envelope |
System is displaying a request for the customer to type a dollar amount |
Enter a legitimate dollar amount |
System requests that customer insert an envelope |
| Deposit |
System performs a legitimate deposit transaction properly |
System is requesting that customer insert an envelope |
Insert an envelope |
System accepts envelope;
System prints a correct receipt showing amount and correct updated balance;
System records transaction correctly in the log (showing message to the bank,
approval back, and acceptance of the envelope) |
| Deposit |
A deposit transaction can be cancelled by the customer any time prior to
inserting an envelope |
System is displaying menu of account types |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Deposit |
A deposit transaction can be cancelled by the customer any time prior to
inserting an envelope |
System is requesting customer to enter a dollar amount |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Deposit |
A deposit transaction can be cancelled by the customer any time prior to
inserting an envelope |
System is requesting customer to insert an envelope |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Deposit |
A deposit transaction is cancelled automatically if an envelope is not
inserted within a reasonable time |
System is requesting customer to insert an envelope |
Wait for the request to time out |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Transfer |
System asks customer to choose an account to transfer from |
Menu of transaction types is being displayed |
Choose Transfer transaction |
System displays a menu of account types specifying transfer from |
| Transfer |
System asks customer to choose an account to transfer to |
Menu of account types to transfer from is being displayed |
Choose checking account |
System displays a menu of account types specifying transfer to |
| Transfer |
System asks customer to enter a dollar amount to transfer |
Menu of account types to transfer to is being displayed |
Choose savings account |
System displays a request for the customer to type a dollar amount |
| Transfer |
System performs a legitimate transfer transaction properly |
System is displaying a request for the customer to type a dollar amount |
Enter a legitimate dollar amount |
System prints a correct receipt showing amount and correct updated balance;
System records transaction correctly in the log (showing both message to the bank
and approval back) |
| Transfer |
A transfer transaction can be cancelled by the customer any time prior to
entering dollar amount |
System is displaying menu of account types specifying transfer from |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Transfer |
A transfer transaction can be cancelled by the customer any time prior to
entering dollar amount |
System is displaying menu of account types specifying transfer to |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Transfer |
A transfer transaction can be cancelled by the customer any time prior to
entering dollar amount |
System is requesting customer to enter a dollar amount |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Inquiry |
System asks customer to choose an account to inquire about |
Menu of transaction types is being displayed |
Choose Inquiry transaction |
System displays a menu of account types |
| Inquiry |
System performs a legitimate inquiry transaction properly |
System is displaying menu of account types |
Choose checking account |
System prints a correct receipt showing correct balance;
System records transaction correctly in the log (showing both message to the bank
and approval back) |
| Inquiry |
An inquiry transaction can be cancelled by the customer any time prior to
choosing an account |
System is displaying menu of account types |
Press "Cancel" key |
System displays an appropriate message and offers customer the option of choosing
to do another transaction or not. |
| Invalid PIN Extension |
Customer is asked to reenter PIN |
|
Enter an incorrect PIN;
Attempt an inquiry transaction on the customer's checking account |
Customer is asked to re-enter PIN |
| Invalid PIN Extension |
Correct re-entry of PIN is accepted |
Request to re-enter PIN is being displayed |
Enter correct PIN |
Original transaction completes successfully |
| Invalid PIN Extension |
A correctly re-entered PIN is used for subsequent transactions |
An incorrect PIN has been re-entered and transaction completed normally |
Perform another transaction |
This transaction completes successfully as well |
| Invalid PIN Extension |
Incorrect re-entry of PIN is not accepted |
Request to re-enter PIN is being displayed |
Enter incorrect PIN |
An appropriate message is displayed and re-entry of the PIN is again
requested |
| Invalid PIN Extension |
Correct re-entry of PIN on the second try is accepted |
Request to re-enter PIN is being displayed |
Enter incorrect PIN the first time, then correct PIN the second time |
Original transaction completes successfully |
| Invalid PIN Extension |
Correct re-entry of PIN on the third try is accepted |
Request to re-enter PIN is being displayed |
Enter incorrect PIN the first time and second times, then correct PIN the third time |
Original transaction completes successfully |
| Invalid PIN Extension |
Three incorrect re-entries of PIN result in retaining card and aborting transaction |
Request to re-enter PIN is being displayed |
Enter incorrect PIN three times |
An appropriate message is displayed;
Card is retained by machine;
Session is terminated |