Computers as Components, 2nd Edition

268 CHAPTER 5 Program Design and Analysis

we can identify testing methods that provide reasonable amounts of testing while

keeping the testing time within reasonable bounds.

The two major types of testing strategies:

■ Black-box methods generate tests without looking at the internal structure

of the program.

■ Clear-box (also known as white-box) methods generate tests based on the

program structure.

In this section we cover both types of tests, which complement each other by

exercising programs in very different ways.

5.10.1 Clear-Box Testing

The control/data flow graph extracted from a program’s source code is an important

tool in developing clear-box