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#assertions

Every repository in the public record carrying this tag — from its GitHub topics or the keywords its package registries publish. Health is measured under the same versioned methodology as the rest of the record.

53 records
Tagged “assertions”Ranked by health index
Maven
96Exceptionalhealth index
karatelabs/karate
Test Automation Made Simple
Java★ 8,931Aug 28, 2026
MITAug 28, 2026 · metrics 2.10.0
npm
96Exceptionalhealth index
remix-run/remix
The fully-stacked web framework
TypeScript★ 33.4K↓ 180.5K/moSep 15, 2026
MITSep 15, 2026 · metrics 2.10.0
Maven
94Exceptionalhealth index
assertj/assertj
Fluent testing assertions for Java and the JVM
Java★ 2,846Sep 14, 2026
Apache-2.0Sep 14, 2026 · metrics 2.10.0
npm
94Exceptionalhealth index
chaijs/chai
BDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.
JavaScript★ 8,267↓ 432M/moSep 16, 2026
MITSep 16, 2026 · metrics 2.10.0
NuGet · npm · RubyGems
94Exceptionalhealth index
fluentassertions/fluentassertions
A 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
Custom licenseOct 20, 2026 · metrics 2.10.0
Maven · npm
94Exceptionalhealth index
kotest/kotest
Powerful, elegant and flexible test framework for Kotlin with assertions, property testing and data driven tests.
Kotlin★ 4,789Aug 28, 2026
Apache-2.0Aug 28, 2026 · metrics 2.10.0
NuGet · npm · RubyGems
93Exceptionalhealth index
AwesomeAssertions/AwesomeAssertions
A fork of FluentAssertions controlled by the community.
C#★ 1,126Sep 9, 2026
Apache-2.0Sep 9, 2026 · metrics 2.10.0
Go
92Excellenthealth index
stretchr/testify
A toolkit with common assertions and mocks that plays nicely with the standard library
Go★ 26.2KSep 16, 2026
MITSep 16, 2026 · metrics 2.10.0
NuGet
92Excellenthealth index
wiremock/WireMock.Net
WireMock.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
Apache-2.0Sep 11, 2026 · metrics 2.10.0
—
91Excellenthealth index
pester/Pester
Pester is the ubiquitous test and mock framework for PowerShell.
PowerShell★ 3,332Sep 10, 2026
Custom licenseSep 10, 2026 · metrics 2.10.0
PyPI
90Excellenthealth index
unionai-oss/pandera
A light-weight, flexible, and expressive statistical data testing library
Python★ 4,443Aug 28, 2026
MITAug 28, 2026 · metrics 2.10.0
npm
89Excellenthealth index
boneskull/bupkis
Uncommonly extensible assertions for the beautiful people
TypeScript★ 8↓ 5,448/moSep 15, 2026
BlueOak-1.0.0Sep 15, 2026 · metrics 2.10.0
Packagist
87Excellenthealth index
nette/tester
Tester: enjoyable unit testing in PHP with code coverage reporter. 🍏🍏🍎🍏
PHP★ 486↓ 156.4K/moOct 21, 2026
Custom licenseOct 21, 2026 · metrics 2.10.0
PyPI
86Excellenthealth index
Solganis/assertpy2
Fluent, 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
BSD-3-ClauseSep 11, 2026 · metrics 2.10.0
NuGet
83Excellenthealth index
AutoFixture/AutoFixture
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.
C#★ 3,538Sep 9, 2026
MITSep 9, 2026 · metrics 2.10.0
Go · npm
83Excellenthealth index
mvrahden/go-test
Go 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
MITOct 20, 2026 · metrics 2.10.0
Packagist
78Goodhealth index
sinnbeck/laravel-dom-assertions
Adds DOM assertions to laravels test responses
PHP★ 106↓ 20.7K/moSep 11, 2026
MITSep 11, 2026 · metrics 2.10.0
PyPI
77Goodhealth index
digline/digline
Regression testing for LLM applications — with the baseline in your repository, not on someone's server.
Python★ 5Sep 18, 2026
Apache-2.0Sep 18, 2026 · metrics 2.10.0
crates.io
77Goodhealth index
innoave/asserting
Fluent assertions for tests in Rust that are convenient to write and easy to extend
Rust★ 9↓ 41.4K/moSep 27, 2026
Apache-2.0Sep 27, 2026 · metrics 2.10.0
npm
75Goodhealth index
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
MITSep 17, 2026 · metrics 2.10.0
Go
75Goodhealth index
monkescience/testastic
Go testing toolkit with structured document comparison (JSON, YAML, HTML) and expressive assertions
Go★ 1Sep 13, 2026
MITSep 13, 2026 · metrics 2.10.0
NuGet
73Goodhealth index
ANcpLua/ANcpLua.Roslyn.Utilities
Utilities and fluent testing framework for Roslyn incremental source generators. DiagnosticFlow, EquatableArray, snapshot testing.
C#★ 3Sep 10, 2026
MITSep 10, 2026 · metrics 2.10.0
crates.io
73Goodhealth index
brendanzab/approx
Approximate floating point equality comparisons and assertions
Rust★ 191↓ 12.7M/moSep 17, 2026
Apache-2.0Sep 17, 2026 · metrics 2.10.0
NuGet
73Goodhealth index
feO2x/Light.GuardClauses
A lightweight .NET library for expressive Guard Clauses.
C#★ 93Sep 13, 2026
MITSep 13, 2026 · metrics 2.10.0
npm
73Goodhealth index
sindresorhus/is
Type check values
TypeScript★ 1,793↓ 229M/moSep 16, 2026
MITSep 16, 2026 · metrics 2.10.0
npm
71Goodhealth index
civitas-cerebrum/element-interactions
A robust set of Playwright steps for readable interaction and assertions.
TypeScript★ 8↓ 2,821/moSep 18, 2026
MITSep 18, 2026 · metrics 2.10.0
npm
71Goodhealth index
sensigo-hq/realm
Open-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
Custom licenseOct 21, 2026 · metrics 2.10.0
crates.io
69Goodhealth index
4DA-Systems/Victauri
X-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
Apache-2.0Sep 18, 2026 · metrics 2.10.0
npm
69Goodhealth index
KensioSoftware/smartass
TypeScript-first test assertion functions with precise type narrowing via assertion signatures.
TypeScript★ 2↓ 3,878/moSep 11, 2026
Apache-2.0Sep 11, 2026 · metrics 2.10.0