Hypothesis is a powerful, flexible, and easy to use library for property-based testing.

Property based testing framework for JavaScript (like QuickCheck) written in TypeScript

Supercharge your API testing, catch bugs, and ensure compliance

Functional programming in Java

QuickCheck for Swift

Property-based testing, JUnit-style

Data generation and property-based testing for Elixir. 🔮

A unit test-like interface for fuzzing and symbolic execution

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

Data specification and generation

Release with confidence, state-of-the-art property testing for Haskell.

A smooth testing lib for F#. APIs made for humans! Strong testing methodologies for everyone!

JQF + Zest: Coverage-guided semantic fuzzing for Java.

GOlang Property TestER

Rapid is a modern Go property-based testing library

TypeCheck: Fast and flexible runtime type-checking for your Elixir projects.

Property based testing for Java 8

Modular, structure-aware, and feedback-driven fuzzing engine for Rust functions

Property based Testing for Elixir (based upon PropEr)

QuickCheck inspired property-based testing for OCaml.