Boundary Value Analysis

• Black-box technique that focuses on the boundaries of the input domain rather than its center
• BVA guidelines:
1. If input condition specifies a range bounded by values a and b, test cases should include a and b, values just above and just below a and b
2. If an input condition specifies and number of values, test cases should be exercise the minimum and maximum numbers, as well as values just above and just below the minimum and maximum values
3. Apply guidelines 1 and 2 to output conditions, test cases should be designed to produce the minimum and maxim output reports
4. If internal program data structures have boundaries (e.g. size limitations), be certain to test the boundaries