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MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.
Code coverage for Ruby with a powerful configuration library and automatic merging of coverage across test suites
A Matcher Framework for Swift and Objective-C
A library to support tests with throwaway instances of Docker containers for all compatible .NET Standard versions.
Awaitility is a small Java DSL for synchronizing asynchronous operations
A Java architecture test library, to specify and assert architecture rules in plain Java
Simple one-liner tests for common Rails functionality
AutoFixture is an open source library for .NET designed to minimize the 'Arrange' phase of your unit tests in order to maximize maintainability. Its primary goal is to allow developers to focus on what is being tested rather than how to setup the test scenario, by making it easier to create object graphs containing test data.
QA Wolf from anywhere — your terminal, your CI, your AI agent.
A gem providing "time travel", "time freezing", and "time acceleration" capabilities, making it simple to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call.
Papercut SMTP -- The Simple Desktop Email Server
Chaos testing, network emulation, and stress testing tool for containers
Go faster, off the Rails - Benchmarks for your whole Rails app
A Grunt workflow for designing and testing responsive HTML email templates with SCSS.
Global edition of ARTEX — an LLM multi-agent autonomous penetration-testing framework. English default, switchable to Korean/Chinese/Spanish/Japanese. For authorized, defensive and detection use only. (upstream: Autumn-27/ARTEX, AGPL-3.0)
:chart_with_upwards_trend: The Rack Based A/B testing framework
Testcontainers is a NodeJS library that supports tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
validate the structure of your container images
A contract-driven gRPC regression harness for AI coding agents, with human-approved baselines. Snapshot the valid call chains of an API so an agent can look one up instead of tracing for it. gRPC today, OpenAPI next
Distributed load-testing framework for .NET. Create distributed load test scenarios entirely using plain C# or F#. It is designed to test any system regardless of the protocol or a semantic model (Pull/Push).
Mutation testing for Ruby. AI writes your code. AI writes your tests. But who tests the tests?
VW PHPUnit extension makes your failing test cases succeed under CI tools scrutiny
Synthetic data generators for tabular and time-series data
Test your code without writing mocks with ephemeral Docker containers 📦 Setup popular services with just a couple lines of code ⏱️ No bash, no yaml, only code 💻