White-Box Testing

White-Box Testing

Steven Zeil

Old Dominion University, Dept. of Computer Science

Copyright © 1999-2008 Steven J. Zeil, Old Dominion University

Table of Contents

1. White-Box Testing

1.1. Combining Black and White-Box Testing

2. Statement Coverage

2.1. Example: statement coverage
2.2. 100% Coverage may not be Possible
2.3. Monitoring Statement Coverage
2.4. Monitoring Statement Coverage with gcov

3. Branch Coverage

3.1. Difference from Statement Coverage
3.2. Difference from Statement Coverage
3.3. Example: branch coverage
3.4. Monitoring Branch Coverage with gcov

4. Loop Coverage

5. Final Thought: Combining Black and White-Box Testing

Testing traditionally can be conducted in three styles

Black-Box testing
- Try to choose "smart" tests based on the requirements, without looking at the code.
White-Box testing
- Try to choose "smart" tests based on the structure of the code, with minimal reference to the requirements.
Random testing
- Try to use directed random selection to choose tests that are "representative" of how the program will be used.


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