Maven96Exceptionalhealth index
Java★ 8,931Aug 28, 2026
npm96Exceptionalhealth index
TypeScript★ 33.4K↓ 180.5K/moSep 15, 2026
Maven94Exceptionalhealth index
Java★ 2,846Sep 14, 2026
npm94Exceptionalhealth index

chaijs/chaiBDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.
JavaScript★ 8,267↓ 432M/moSep 16, 2026
NuGet · npm · RubyGems94Exceptionalhealth index

fluentassertions/fluentassertionsA very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.7, as well as .NET Core 2.1, .NET Core 3.0, .NET 6, .NET Standard 2.0 and 2.1. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3.
C#★ 3,813Oct 20, 2026
Maven · npm94Exceptionalhealth index

kotest/kotestPowerful, elegant and flexible test framework for Kotlin with assertions, property testing and data driven tests.
Kotlin★ 4,789Aug 28, 2026
NuGet · npm · RubyGems93Exceptionalhealth index
C#★ 1,126Sep 9, 2026
Go92Excellenthealth index

stretchr/testifyA toolkit with common assertions and mocks that plays nicely with the standard library
Go★ 26.2KSep 16, 2026
NuGet92Excellenthealth index

wiremock/WireMock.NetWireMock.Net is a flexible product for stubbing and mocking web HTTP responses using advanced request matching and response templating. Based on WireMock Java, but extended and different functionality. Full documentation can be found at https://wiremock.org/dotnet/.
C#★ 1,680Sep 11, 2026

pester/PesterPester is the ubiquitous test and mock framework for PowerShell.
PowerShell★ 3,332Sep 10, 2026
PyPI90Excellenthealth index
Python★ 4,443Aug 28, 2026
npm89Excellenthealth index
TypeScript★ 8↓ 5,448/moSep 15, 2026
Packagist87Excellenthealth index

nette/testerTester: enjoyable unit testing in PHP with code coverage reporter. 🍏🍏🍎🍏
PHP★ 486↓ 156.4K/moOct 21, 2026
PyPI86Excellenthealth index

Solganis/assertpy2Fluent, fully-typed assertion library for Python: your type checker sees only the assertions that fit the value, and every failure carries a structured diff. Soft assertions, polling, inline snapshots, OpenAPI contracts.
Python★ 5↓ 6,017/moSep 11, 2026
NuGet83Excellenthealth index

AutoFixture/AutoFixtureAutoFixture 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.
C#★ 3,538Sep 9, 2026
Go · npm83Excellenthealth index

mvrahden/go-testGo test suite framework – BDD vocabulary, lifecycle hooks, fixtures, fuzzing, benchmarking, snapshots. Zero reflection, zero runtime deps – powered by code generation.
Go · TypeScript★ 129Oct 20, 2026
Packagist78Goodhealth index
PHP★ 106↓ 20.7K/moSep 11, 2026

digline/diglineRegression testing for LLM applications — with the baseline in your repository, not on someone's server.
Python★ 5Sep 18, 2026
crates.io77Goodhealth index

innoave/assertingFluent assertions for tests in Rust that are convenient to write and easy to extend
Rust★ 9↓ 41.4K/moSep 27, 2026

forwardemail/supertest🕷 Super-agent driven library for testing node.js HTTP servers using a fluent API. Maintained for @forwardemail, @ladjs, @spamscanner, @breejs, @cabinjs, and @lassjs.
JavaScript★ 14.4KSep 17, 2026

monkescience/testasticGo testing toolkit with structured document comparison (JSON, YAML, HTML) and expressive assertions
Go★ 1Sep 13, 2026

ANcpLua/ANcpLua.Roslyn.UtilitiesUtilities and fluent testing framework for Roslyn incremental source generators. DiagnosticFlow, EquatableArray, snapshot testing.
C#★ 3Sep 10, 2026
crates.io73Goodhealth index
Rust★ 191↓ 12.7M/moSep 17, 2026
C#★ 93Sep 13, 2026
TypeScript★ 1,793↓ 229M/moSep 16, 2026
TypeScript★ 8↓ 2,821/moSep 18, 2026

sensigo-hq/realmOpen-source workflow engine for AI agents. An agent calls Realm over MCP, or realm agent drives a model from the CLI. Steps run in order, agent answers are checked against the schema a step declares, human gates pause the run until answered, and each finished step is recorded.
TypeScript★ 2↓ 3,003/moOct 21, 2026
crates.io69Goodhealth index

4DA-Systems/VictauriX-ray vision and hands for AI agents inside Tauri apps — DOM, IPC, Rust backend, and database through one embedded MCP server. 35 tools. Zero production cost.
Rust★ 5↓ 38.5K/moSep 18, 2026

KensioSoftware/smartassTypeScript-first test assertion functions with precise type narrowing via assertion signatures.
TypeScript★ 2↓ 3,878/moSep 11, 2026
Packagist69Goodhealth index
PHP★ 2↓ 854/moSep 13, 2026