#testing

A library that records a program's external inputs — database, HTTP, clock, randomness — and replays them, so any past run can be reproduced and debugged exactly.

Stashbox Integration for ASP.NET Core, .NET Generic Host and ServiceCollection based applications.

Copy-on-write Postgres branches on plain Docker or Kubernetes. Branching a 5 GiB database took 61.9s and copied the whole dataset — until one flag fixed it. Now 1.9s and 33 MiB.

🧪 deadass simple testing

Reliable test network infrastructure for Freenet

Playwright module for testcontainers-node

A Storybook Addon, Save the screenshot image of your stories :camera: via Chromium.

Gleam bindings for the Erlang EUnit test framework

Static analysis for flaky Go tests — catches flaky-test patterns before they flake in CI

minitest provides a complete suite of testing facilities supporting TDD, BDD, and benchmarking.

Tia is a free test impact analyser library used for selective testing with common test runners such as JUnit and Spock.

Laravel Browser Kit Testing Helper for Packages Development

Mock built-in PHP functions (e.g. time() or rand()) in PHPUnit.

lint-staged for test changed files

E2E testing where you write plain language and the LLM plans once — every replay is deterministic, LLM-free and costs $0.

Warm-process MCP server for PHPUnit — ~4× faster per test call. Works with Claude Desktop, Cline, Continue, Cursor, Zed, any MCP client.

Intelligent Playwright test distribution across CI shards using timing data

ApprovalTest verification library for .Net

Opensource Drop-in placeholder images for every project.

Eliminate superfluous features in a Rust project.

localaik is a local compatibility server for a subset of the Gemini and OpenAI APIs. Run one container locally, point your SDK to it, and the proxy serves both protocol shapes on the same port for tests and development.

🎠 Because TDD is awesome

Generate plain fixture functions from Go structs — the same code you'd write by hand, prefilled with fake data

A lightweight, zero-dependency browser testing framework built on Web Components.

Support utilities for enhanced testing capabilities.

Adds a Given/When/Then DSL to mocha as an alternative style for specs

Use the Eloquent factory system with your Doctrine entities

Uncompromising test isolation: your tests structurally cannot touch your real files, secrets, or git identity -- First-class support for Go, Python with pytest, and TypeScript with Node

Fully-featured, lightweight command-line test runner

Thunder Client is a lightweight Rest API Client Extension for VS Code.