Property Based Testing Python Packages

hypothesis

The property-based testing library for Python

schemathesis

Catch API bugs before your users do

jsf

Creates fake JSON files from a JSON schema

deal

🤝 Design by contract for Python. Write bug-free code. Add a few decorators, get static analysis and tests for free.

minigun-soren-n

A library for property-based testing of Python programs. Please read the documentation to learn more: https://minigun.readthedocs.io/en/latest/

hypothesis-pytest

The property-based testing library for Python

hypothesis-django

The property-based testing library for Python

mathema

Claim-Driven Development: turn software intent into verifiable evidence.

conformly

Generate valid & invalid test data from your typed schemas

tstl

Template Scripting Testing Language tool: automated test generation for Python

fencekit

Redis-backed idempotency and fenced locks for background jobs.

cleitonforge

Differential fuzzer for quantum compilers. Found the CommutativeCancellation soundness bug fixed in Qiskit 2.5.1.

permissiondiff

CI-native differential authorization regression testing for Python—replay exact permission cases, enforce invariants, and catch DENY→ALLOW changes.

hypothesis-gufunc

Extension to hypothesis for testing numpy general universal functions

mathema-language

Language domains for mathema: the alphabets, predicate languages, hazard families and schema languages a claim quantifies text and structured values over with L[...].

hypothesis-datetime

The property-based testing library for Python

hypothesis-fakefactory

The property-based testing library for Python

tracebook-sim

Conformance testing, semantic diffing, and minimal reproducible failures for matching engines.

parquity

Find and reproduce semantic disagreements between Parquet engines.

python-proptest

A Python Property-based Testing Library

hypothesis-numpy

The property-based testing library for Python

holosim

Deterministic continuity and verification framework for preserving corrections, uncertainty, evidence, and reconstruction across AI and software handoffs.

swagger-conformance

Python based tool for testing whether your API conforms to its Swagger schema

nanofuzz-runtime

NaNofuzz is a fast and easy-to-use automatic test suite generator for TypeScript and Python that runs inside VS Code and supports fuzz, example, and property-based testing