JSPM

Given an object and a property, replaces a property descriptor (or deletes it), and returns a thunk to restore it.

JavaScript Testing utilities for React

Simulate react-select events for react-testing-library

A Karma plugin. Launcher for Firefox.

PostgreSQL module for Testcontainers

A client-side server to help you build, test and demo your JavaScript app

The base plugin used to create Appium plugins

Storybook Vitest addon: Blazing fast component testing using stories

Power Assert feature enhancer for assert function/object

A superset of the JSDOM environment for Jest that respects Node.js globals.

Parsing string to array of args like node on bash do.

Tools to support code coverage in Storybook

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Android UiAutomator and Chrome support for Appium

The Karma command line interface.

Temporal.io SDK Testing sub-package

Test Redux Saga with an easy plan

The Mailosaur Node library lets you integrate email and SMS testing into your continuous integration process.

Flush promises in tests

The powerful, easy-to-use testing framework.

A set of tools for emulating browser behavior in jsdom environment

Check if a process is running

Render React components in Vitest Browser Mode

Run gherkin-syntaxed specs with cypress.io

An unofficial React 18 adapter for Enzyme, that you probably shouldn't use.

Persistent storage for Appium extensions

Redis module for Testcontainers

Extends Cypress' cy commands with localStorage methods. Allows preserving localStorage between tests

Test'em 'scripts! Javascript Unit testing made easy.

A port of Node v6's internal _deepEqual function in a universal style

Chai plugin for JSON Schema v4

Integrate Vitest with Storybook

Mock HTTP server for testing HTTP clients and stubbing webservices

A lightweight Jest mock for unit testing Express

Simple and complete Svelte testing utilities that encourage good testing practices.

Automated browser testing for the modern web development stack.

Pact for all things Javascript

Marble testing helpers for RxJS and Jasmine

Elastic synthetic monitoring agent

Fake data generator

Supercharged End 2 End Testing Framework for NodeJS

Chai assertion that provides Jest's snapshot testing

AngularJS mocks for testing

Power Assert in JavaScript

Power Assert output formatter

Power Assert feature enhancer for assert function/object

Skip the rest of Cypress tests on first failure

Cypress test reporter for CircleCI

A function to test for identical deep equality (based on lodash's isEqual).

Test React components using Cypress

REST API Testing Tool for all levels in a Test Pyramid

Show some ❤️ to process errors

Babel plugin for power-assert

LocalStack module for Testcontainers

Testing Matchers for Enzyme

Easy to use Node.js based end-to-end testing solution for web applications using the W3C WebDriver API.

Preview your Jest tests in a browser

Visual regression testing tool with cypress

Jest runner for Angular build facade. Allows ng test run with Jest instead of Karma

Hardhat utils for testing

Runtime Environment for enzyme tests in jest

Validates a deep structured JSON pattern

Utility to make vitest tests fail when console.error() or console.warn() are used

A Test-Anything-Protocol library for JavaScript

date / time comparison matchers for chai

React Apollo testing utilities.

WebDriver/Selenium 2 node.js client

Extends Chai with an assertion for deeply matching objects (i.e. subset equality checking)

Simplifying the use of mocks with Node.js

Generate fast-check arbitraries from Zod schemas.

Hardhat utils for testing

The api for the extendable JavaScript mutation testing framework Stryker

The extendable JavaScript mutation testing framework

mock stdout and stderr

Applitools Eyes SDK for Playwright

High Level DOM Assertions for QUnit

Power Assert instrumentor from source to source, with source-map

Compliance tests for textlint's AST(Abstract Syntax Tree).

Property based testing for Jest based on fast-check

Nodejs bindings for LambdaTest Tunnel

A flexible plugin that drives your tests with human-written commands, enhanced by the power of large language models (LLMs)

BDD Testing with Playwright runner

Ignore imported style files when running in Node

An NSubstitute port to TypeScript called substitute.js.

a simple chai plugin for better array assertions

To compare dom and shadow dom trees. Part of open-wc recommendations

Extends Cypress' cy commands that let you integrate email and SMS testing into your continuous integration process.

Library to help unit testing when using apollo-client

Convert assert to power-assert on ESTree AST

Filter out unwanted `console.log()` output

A forked of Chai 5 which adds Promise support in order to work with Nightwatch commands.

Zero-dependency (req,res) handler callback agent for use in client requests

Official Cypress schematic for the Angular CLI

Power Assert feature instrumentor based on the ECMAScript AST

Spies for the Chai assertion library.

DOM assertions for the Chai assertion library using vanilla JavaScript

Mock axios requests for testing

Check if a value is an `Error` instance

Testing following open-wc recommendations

A tool to mock a JWKS for development of microservices who consume jwts signed with RSA

Shared resources of db-migrate for drivers and also used internally.

Testing Helpers following open-wc recommendations

Power Assert feature instrumentor on the fly

With Bruno CLI, you can now run your API collections with ease using simple command line commands.

Mocha tests in Electron.

A library to download and launch Sauce Connect.

Utilities to help you create E2E test suites for apps using Clerk

SMTP Server and Web Interface for reading and testing emails during development

Utility library emit test data through @wire adapters in Lightning web component tests

Use custom tags to slice up Cypress test runs.

Calibre - Page speed performance testing with Google Lighthouse

Simple and complete Preact DOM testing utilities that encourage good testing practices.

MySQL module for Testcontainers

An implementation of https://github.com/emberjs/rfcs/pull/726

Shallow deep equal assertion for chai

Node.js SDK for visual testing with Argos.

Extends Chai with lint-friendly terminating assertions.

a library of conditions that are useful for end-to-end tests

An extension of DOM-testing-library to provide hooks into the shadow dom


UI for testing API in Cypress

Capture and assert HTTP ajax calls in webdriver.io 🕸

A11y tests for chai

Marble testing helpers library for RxJs and Jest

Allure Cucumber.JS integration

An RxJS marble testing library for any test framework

Hardhat Plugin For Replicable Deployments And Tests

A Storybook addon, Save the screenshot image of your stories! via puppeteer.

A HTML reporting module for Cypress-Image-Diff to parse the JSON output to a beautiful report

Confidently unit and integration test your Next.js API routes/handlers in an isolated Next.js-like environment

Playwright SDK for visual testing with Argos.

Stub behaviors of Vitest mock functions with a small, readable API.

Parse test results from JUnit, TestNG, xUnit, cucumber and many more

Applitools Eyes SDK for Puppeteer

Kafka module for Testcontainers

Provides 'specflow' like bindings for CucumberJS 7.0.0+ in TypeScript 1.7+.

Runs Mocha unit tests but randomizes their order

Knapsack Pro Core library splits tests across CI nodes and makes sure that tests will run in optimal time on each CI node. This library gives core features like communication with KnapsackPro.com API. This library is a dependency for other projects specif

A testing utility for nest-commander. It builds on top of ideas from @nestjs/testing and is not tied to any test framework directly.

fail cypress test on console error

Generate test data for your tests easily.

Chai.js assertions for enzyme

Allure Vitest integration

NATS module for Testcontainers

the open source API testing client

Custom Jasmine matchers for testing DOM elements

Allure Jest integration

Provides a method to inject and analyze web pages using axe

Run Mocha tests

A client-side server to help you build, test and demo your Ember app

Jest utility for creating variations of the same test

The Cypress plugin for generating HTTP Archive (HAR) files is a tool that allows developers and QA engineers to capture detailed information about network requests made during the execution of Cypress tests.

Visual Regression Testing for Storybook

An ember-cli addon to test against multiple dependencies, such as ember and ember-data.

A simple mocking library for TypeScript

file system assertions for chai

Applitools Eyes SDK for TestCafe

puppeteer + dom-testing-library

Test your time critical app by overriding the native Javascript Date function

Temporal.io SDK code coverage integration

Asynchronous BDD & continuous integration for node.js

Common code for jest-openapi and Chai OpenAPI Response Validator

A library of utilities for testing with the ngx-translate i18n Angular library

An in-memory implementation of webextension-polyfill for testing. Supports all test frameworks (Vitest, Jest, etc)

tRPC API for Mock Service Worker (MSW).

MongoDB module for Testcontainers

A mock provider for your blockchain testing needs.

Write Beautiful Specs with Custom Matchers for Jest

io-ts codec to fast-check arbitrary mapping

Generate all possible permutations of an object's key-value pairs

Knapsack Pro Jest splits Jest tests across CI nodes and makes sure that tests will run in optimal time on each CI node.

Write Beautiful Specs with Custom Matchers

Assert utility from yeoman

LambdaTest Rest Client for Node.js

Visual diffing for UI components

A sweet set of chai matchers for your blockchain testing needs.

A simple mock interface specifically for testing code relying on Sequelize models

A mock ens implementation for testing.

Visual Debugging Experience for Vitest 🧪🖼⚡️

jest wrapper for fetch-mock

A Jest integration to run assertions in Edge Runtime context.

Test, mock, intercept and modify Apollo Client's operations — in both browser and unit tests!

Implementation of core APIs for the Japa tests runner

This ember-cli addon eases the construction of page objects on your acceptance and integration tests

Generate fake data deterministically from a given input

The 2020 Most Modern Testing Framework For Node.JS With Test Contexts (Reusable BeforeEach / AfterEach Via Separate Files); Masks (Inputs/Outputs In Non-Js Files) And Fork Testing; Interactive Snapshots.

Sweeter, faster and simpler than truffle.

JavaScript "deep equality" / structural equality tester with Node.js flavor.

Mock smart contracts in a smart way.

The react client only integration for api references

Property based testing for Vitest based on fast-check

Allure Cypress integration

Write useful test matchers compatible with Jest and Jasmine.

Jest matchers for asserting that HTTP responses satisfy an OpenAPI spec

A library for handling GraphQL requests with Mirage JS

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utilities for parsing shorthand Selenium capabilities objects

Service Worker Mock ========================= A mock service worker environment generator.

Provides additional types for TypeScript.

React Hooks for shallow rendering

Cypress custom command and hooks to remove downloads folder

Tooling for testing Inngest functions.

> Generate pact contracts from the recorded mock service worker interactions.

testing tool for textlint rule.

A lightweight image comparison tool

Provides a method to inject and analyze web pages using axe

Tizen support for Appium

Snapshots saved against an object

A better way to use the WireMock simulator to test your HTTP APIs

Allure Mocha integration

Vitest wrapper for fetch-mock

Adds testing helpers for driving Stripe Elements with Cypress.

Mock Server supporting multiple route variants and mocks

In-memory file-system with Node's fs API.

Selenium in an npm package

Simple asynchronous testing framework. Never again count your asserts! This tiny testing library is fully callback-based and has a rich API for asserts.

Mocks Server plugin providing an administration REST API

Virtual U2F token for automated testing of U2F/Fido APIs

Adds value / object / DOM element snapshot testing support to Cypress test runner

Core components for the preceptor test runner and aggregator

Accessibility testing for Ember applications

Property-based testing for JavaScript.

Setup helper for PollyJS when using in jest/jasmine test environment

Serve and run your Jasmine specs in a browser

Test utils for react-beautiful-dnd built with react-testing-library.

A standalone utility to manage Xvfb (X Virtual Framebuffer) for headless testing

Execute jasmine with ts-node

Simple and complete Solid testing utilities that encourage good testing practices.

mocha integration for sinon

A CLI for accessibility testing using axe-core

MSSQL Server module for Testcontainers

Run load tests for your web application. Mostly ab-compatible interface, with an option to force requests per second. Includes an API for automated load testing.

Pluggable mock server supporting multiple route variants and mocks

Pa11y-ci reporter that generates HTML reports - summary report and detailed reports for each page

DOM-less simple JavaScript BDD testing framework for Node

Mocks Server plugin providing proxy variant handler

Render Svelte components in Vitest Browser Mode

Smarter snapshot utility for Mocha and BDD test runners

Plugin for batching and executing Appium driver commands

Generates tokens for `X-TB-TOKEN-AUTH` header when using OpenTok REST API.

Dynamodb local plugin for devops

A sandboxed Node.js module loader that lets you inject dependencies into your modules.

Easy test setup without side effects

Run DynamoDB local for development and testing