Software Verification and Validation

Understanding Testing

Exercise Module Number: ST$08$

Instruction: Answer the given questions.

$1.$ An order input system should allow prospective customers to submit an order which in some cases may be complicated. Discuss an appropriate approach to test the primary function of the system. $($Case $1$: consider ordering pizza, specifying toppings, and quantity; Case $2$: consider ordering metal ingots, specifying product code, quantity, delivery date.$)$

$2.$ When testing a software system of multiple components, we set up a test plan to first do unit testing and then integration testing. Why then do we sometimes have to perform regression testing?

$3.$ What are the advantages of Black Box testing? Why do we choose to test a software product without looking into or even consideration of the structures inside?

$4.$ Why do we need White Box testing? What advantages are there in White Box testing in contrast to Black Box testing?

$5.$ When bad input data may result in unintended behavior of a system $($including system crash and$/$or other malicious destruction$),$ at what stage of a test plan should we be dealing with that?

Testing Tools

Exercise Module Number: ST$03$

Instruction: Name and describe the kind of testing tools appropriate for the case, and discuss how to construct such a tool for testing

$6.$ We are given a simple image processing function for unit testing: the input is an image file and the output is another image file, but the function takes a collection of $9$ parameters $($in a $3$x$3$ matrix$)$ to control the processing. Discuss how we may approach base line testing for the function as a unit?

$7.$ We have a library collection of image processing software to be tested. Each processing function is documented with its API $($application program interface$)$ for use, but these functions also work in concert when mixed and matched in appropriate ways.

Test Cases for a Given Requirement

Exercise Module Number: ST$08$

Instruction: Discuss the nature of Test Cases needed for each requirement $($number and type$)$ and create a list of appropriate Test Cases for the given Requirements.

$8.$ When the password change request form is submitted, the software must verify that the new password entry and the $2$nd entry for confirmation are the same.

$9.$ Consider a bank account information system. User identification must first be authenticated before access to account information can be granted.

$10.$ Before finalizing the course registration, the student should have cleared any pending financial obligations. The procedure should call to verify the student account with the financial system.