Property-Based Testing

fast-check patterns for JavaScript/TypeScript that find edge cases unit tests miss. Includes 6 canonical property categories with worked examples targeting agent-studio's own utilities.

When to Use

• New utility functions (path normalization, parsers, transformers)
• Bug fixes where the fix has a general invariant (not just the specific repro case)
• Security-sensitive string handling (avoid escaping bugs, injection vectors)
• Any function where "this property should hold for ALL inputs" can be stated

The 6 Canonical Property Categories

1. Inverse Operations (Round-trip)