Testing & Implementasi Sistem-Dasar-Dasar Testing/PsikologiPertemuan ke – 2

Tujuan/Obyektifitas Testing

Melakukan verfikasi, validasi dan deteksi error

Misi dari Tim Testing

Misi tim testing tidak hanya melakukan testing tapi juga untuk meminimalkan resiko kegagalan proyek

Tester mencari masalah, potensi masalah Tester tidak melakukan pembenahan produk

Tidak mempermalukan, atau melakukan komplain pada individu lain, hanya menginformasikan

Psikologi Testing

Paradigma yang kurang tepat: • “Testing is the process of demonstrating that errors are

not present.”

• “The purpose of testing is to show that a program performs its intended functions correctly.”

• “Testing is the process of establishing confidence that a program does what it is supposed to do.”

These definitions are upside-down.

Psikologi Testing (2)

When you test a program, you want to add some value to it.

Adding value through testing means raising the quality or reliability of the program.

Raising the reliability of the program means finding and removing errors.

Psikologi Testing (3)

don’t test a program to show that it works; rather, you

should start with the assumption that the program contains errors

and then test the program to find as many of the errors as possible.

Testing is the process of executing a program with the intent of finding errors.

Psikologi Testing (4)

Although this may sound like a game of subtle semantics, it’s really an important distinction.

Understanding the true definition of software testing can make a profound difference in the success of your efforts.

Human beings tend to be highly goal-oriented, and establishing the proper goal has an important psychological effect. If our goal is to demonstrate that a program has no errors, then we will subconsciously be steered toward this goal; that is, we tend to select test data that have a low probability of causing the program to fail. On the other hand, if our goal is to demonstrate that a program has errors, our test data will have a higher probability of finding errors.

The latter approach will add more value to the program than the former.

Psikologi Testing (5)

-executed test of a piece of software is successful when it finds errors that can be fixed.

a test that found no errors would likely be considered unsuccessful, a program without errors is basically unrealistic.

Consider the analogy of a person visiting a doctor

Psikologi Testing

such definitions as “testing is the process of demonstrating that errors are not present” is that such a goal is impossible to achieve for virtually all programs,

psychological studies tell us that people perform poorly when they set out on a task that they know to be infeasible or impossible. Crossword puzzle in 15 minutes

Psikologi Testing

an error is clearly present if a program does not do what it is supposed to do, but errors are also present if a program does what it is not supposed to do.

Final: testing is more properly viewed as the destructive

process of trying to find the errors