property-based-testing

Execute property-based testing on user-defined functions with random inputs.

Updated May 7, 2026
One-click install
npx skills add https://github.com/TK-Evans01/tk-harness --skill property-based-testing-tk-evans01
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: property-based-testing
Source: https://github.com/TK-Evans01/tk-harness/tree/main/plugins/tk-house-style/skills/property-based-testing
Command: npx skills add https://github.com/TK-Evans01/tk-harness --skill property-based-testing-tk-evans01

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill provides a way to verify the properties of functions using random inputs, ensuring invariants hold across various scenarios.

Core Features & Use Cases

  • Property-Based Testing: Generates random inputs and verifies properties like roundtrip, idempotence, and commutativity.
  • Use Case: Use this Skill to test serialization functions, pure functions, validators, and normalizers for their behavior across a wide range of inputs.

Quick Start

To apply property-based testing to your function, use the skill with the following command: apply property-based-testing to your_function

Frequently Asked Questions about property-based-testing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What is property-based testing and how does it verify function invariants?

Property-based testing verifies function invariants by generating random inputs and checking if defined properties like roundtrip, idempotence, and commutativity hold true across various scenarios. It ensures operations with clear contracts behave correctly.

How do I test serialization and validation functions with random inputs?

You can test serialization and validation functions with random inputs by applying property-based testing. It generates diverse data to verify that pure functions, normalizers, and validators maintain their expected behavior and contracts across a wide range of inputs.

Can I use property-based testing for pure functions without external dependencies?

Yes, property-based testing is designed for pure functions and operations with clear contracts. It requires no external dependencies, allowing you to directly verify functional behavior and invariants using randomly generated inputs.

What types of properties can I check using random testing for functions?

Using random testing, you can check properties such as roundtrip serialization, idempotence, and commutativity. This approach validates that your functions maintain specific invariants and contracts when subjected to randomly generated inputs.

When should I use property-based testing instead of writing individual unit tests?

Use property-based testing when you need to verify invariants across a wide range of random inputs rather than specific cases. It is ideal for testing serialization, normalization, and validation operations with clear contracts to find edge cases.

How do I get started with applying property-based testing to my function?

To get started with property-based testing, define your function and appropriate property checks, then execute the testing process. This generates random inputs to verify that your function holds specific invariants and properties.