test-property-based

Property-based testing automatically generates hundreds of test cases to validate invariants:

Hypothesis automatically generates 100+ test cases including edge cases you'd never think of: empty lists, single elements, duplicates, large lists, negative numbers, etc.

Philosophy: Instead of "here are 5 examples that should work", write "here's a property that should ALWAYS hold" and let Hypothesis find edge cases.

Property-based testing with Hypothesis for Python projects. Use when writing property tests, testing invariants, generating test cases, fuzz testing, roundtrip testing, or validating behavior across many inputs. Triggers on "property test", "hypothesis test", "generate test cases", "invariant testing", "edge case testing", "stateful testing", "roundtrip test". Works with Python (.py) test files, pytest, pytest-asyncio, and Pydantic models. Source: dawiddutoit/custom-claude.