Edge Case Test Generator

Systematically generate edge case tests that expose boundary conditions, invalid inputs, overflow scenarios, null/undefined handling, concurrency hazards, and type coercion surprises. This skill applies boundary value analysis, equivalence partitioning, and special-value injection to produce tests that catch the defects most likely to escape basic happy-path coverage.

When to Use This Skill

Use this skill when you need to:

• Harden a function or API against unexpected, extreme, or adversarial inputs
• Identify boundary bugs around minimum, maximum, and off-by-one values
• Validate null, undefined, empty, and missing-field handling
• Test numeric overflow, underflow, and precision loss scenarios
• Cover Unicode, encoding, and locale-sensitive string edge cases
• Detect type coercion surprises in dynamically typed languages
• Stress-test concurrent access patterns for race conditions and deadlocks
• Satisfy security review requirements for input validation coverage
• Complement existing unit tests that only cover the happy path

Trigger phrases: "edge cases", "boundary tests", "null handling tests", "overflow tests", "empty input tests", "special value tests", "corner cases", "defensive tests", "input validation tests", "boundary value analysis", "equivalence partitioning"