Boundary Testing

When to use

"Use to find system limits before they find you. Explore extreme conditions — zero load, maximum load, empty inputs, malformed inputs, simultaneous failure of multiple components. Boundaries reveal assumptions that normal operation hides."

Example

"A payment system works for all test transactions. Boundary testing — what happens with $0.00, $0.01, $999,999,999.99, negative amounts, 17 decimal places? The system crashes on negative amounts because the validation assumed positive inputs."

Common misuse

"Testing only the boundaries you can imagine. Real-world failures often occur at boundaries no one thought to test. Pair boundary testing with red teaming (IN10) for adversarial boundary discovery."

Also known as

Related models