Boundary Value refers to the input values at the edges or boundaries of input ranges, which are critical for testing as they often reveal defects in the system. These values include the minimum, maximum, just below, and just above the boundaries of valid input. Characteristics:
Definition:
- Minimum or maximum values in a range
- Values just inside or outside valid ranges
Importance:
- Often cause system errors
- Critical for robust testing
Examples:
- Minimum and maximum ages in a form
- Lowest and highest allowed prices
Testing Focus:
- Values at boundaries
- Values just beyond boundaries
Benefits:
- Uncovers edge case errors
- Improves system reliability
Boundary Value testing is crucial for identifying system limitations and errors.