Testing

Kinds of testing data

Before we can correct an error in logic, we must recognize that an error has occurred. To do so, we need to test the program. Thus, testing and debugging are interrelated activities. Ideally, a test should try all possible paths through a program’s logic. When those paths depend on some sort of input data, designing the test data set is the immediate task.

Testing should proceed using the following kinds of data:

• Typical data
• Extreme but acceptable data
• Unacceptable or incorrect data