assertions

🕷 Super-agent driven library for testing node.js HTTP servers using a fluent API. Maintained for@forwardemail,@ladjs,@spamscanner,@breejs,@cabinjs, and@lassjs.

node assertions supertest superagent

UpdatedSep 3, 2025
JavaScript

karatelabs /karate

Sponsor

Star8.7k

Test Automation Made Simple

testing automation microservices webdriver bdd mock-server load-testing assertions test-automation cucumber developer-tools testing-tools api-testing contract-testing automated-testing testing-framework

UpdatedOct 30, 2025
Java

chaijs /chai

Star8.3k

BDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.

javascript tdd bdd assertions chai

UpdatedNov 4, 2025
JavaScript

kotest /kotest

Star4.7k

Powerful, elegant and flexible test framework for Kotlin with assertions, property testing and data driven tests.

kotlin testing test assertions testing-tools matchers hacktoberfest property-testing

UpdatedNov 5, 2025
Kotlin

unionai-oss /pandera

Star4.1k

A light-weight, flexible, and expressive statistical data testing library

testing schema validation data-validation pandas-dataframe assertions pandas testing-tools data-processing dataframes data-cleaning hypothesis-testing data-verification pandas-validation data-check data-assertions dataframe-schema pandas-validator

UpdatedOct 31, 2025
Python

fluentassertions /fluentassertions

Sponsor

Star3.8k

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-sharp unit-testing tdd xunit assertions mstest bdd-style fluent-assertions hacktoberfest

UpdatedOct 28, 2025
C#

AutoFixture /AutoFixture

Star3.5k

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.

testing unit-testing csharp tdd fsharp dotnet xunit assertions nunit test-data autofixture assertion-library moq fscheck test-data-generator nsubstitute fakeiteasy auto-mocking foq

UpdatedAug 20, 2025
C#

pester /Pester

Star3.2k

Pester is the ubiquitous test and mock framework for PowerShell.

testing mock tdd powershell bdd assertions mocking bdd-framework tdd-framework pester-tests powershell-tests

UpdatedSep 23, 2025
PowerShell

assertj /assertj

Star2.8k

Fluent testing assertions for Java and the JVM

java testing assertions assertj hacktoberfest typed-assertions

UpdatedNov 5, 2025
Java

gavv /httpexpect

Star2.7k

End-to-end HTTP and REST API testing for Go.

testing http json rest websocket assertions

UpdatedAug 28, 2025
Go

jest-community /jest-extended

Star2.4k

Additional Jest matchers 🃏💪

testing jest tdd assertions matchers extended

UpdatedNov 5, 2025
TypeScript

h2non /gock

Star2.2k

HTTP traffic mocking and testing made easy in Go ༼ʘ̚ل͜ʘ̚༽

testing go mock api http https assertions mocking http-server stubs http-transactions interception expectations http-api

UpdatedSep 24, 2024
Go

shouldjs /should.js

Star1.9k

BDD style assertions for node.js -- test framework agnostic

javascript testing tdd test bdd assertions tests should node-js

UpdatedOct 29, 2019
JavaScript

sindresorhus /is

Sponsor

Star1.7k

Type check values

typescript is npm-package assertions type-detection node-module type-check

UpdatedOct 31, 2025
TypeScript

authorjapps /zerocode

Star985

zerocode-tdd is a community-developed, free, open-source, automated testing lib for microservices APIs, Kafka(Data Streams), Databases and Load testing. It enables you to create executable automated test scenarios via simple JSON or YAML — no coding required.