Testing

12-month change compares the average of the last 4 weeks of downloads with the first 4 weeks of the 52-week series. Gzip size is for the whole package, as measured by Bundlephobia. "-" means the value has not been fetched.

• @stdlib/assert-napi-is-typeAssert that a Node-API value is a specified Node-API data type.
• allure-jestAllure Jest integration
• vitest-localstorage-mockAuto mock all localstorage and sessionstorage APIs for your Vitest tests
• @ava/babel-plugin-throws-helperBabel plugin for protecting against improper use of `t.throws()` in AVA
• ts-mock-importsIntuitive mocking for Typescript class imports
• its-nameGiven (Mocha) test object, walks it up to give you list of context names
• vowsAsynchronous BDD & continuous integration for node.js
• @testcontainers/natsNATS module for Testcontainers
• @stdlib/assert-is-nanTest if a value is NaN.
• chai-filesfile system assertions for chai
• @testcontainers/toxiproxyToxiproxy module for Testcontainers
• chai-json-schemaChai plugin for JSON Schema v4
• cypress-fail-on-console-errorfail cypress test on console error
• cypress-mailosaurExtends Cypress' cy commands that let you integrate email and SMS testing into your continuous integration process.
• appium-tizen-driverTizen support for Appium
• @wdio/json-reporterA WebdriverIO plugin to report results in json format.
• ember-tryAn ember-cli addon to test against multiple dependencies, such as ember and ember-data.
• wiremock-captainA better way to use the WireMock simulator to test your HTTP APIs
• tstycheEverything You Need for Type Testing.
• testNode.js 18's node:test, as an npm package
• @testcontainers/rabbitmqRabbitMQ module for Testcontainers
• @swedevtools/livedoc-vitestBDD extensions for Vitest that support LiveDoc reporting with Gherkin syntax and MSpec-style specifications.
• openinputbridge-mcpMCP server exposing OpenInputBridge (Interception-compatible kernel-level input) as SendInput()-alternative tools for GUI/native-app test automation.
• jest-json-schemaJSON schema matcher for jest
• jest-teamcity-reporterTeamcity Reporter for Jest Test Results
• event-reduce-jsjavascript implementation of the event-reduce algorithm https://pubkey.github.io/event-reduce/
• qunitjsAn easy-to-use JavaScript Unit Testing framework.
• selenium-serverSelenium in an npm package
• cypress-image-diff-jsVisual regression testing tool with cypress
• eslint-plugin-codegenAn eslint plugin for inline codegen. Auto-fixes out of sync code, with presets for barrels, jsdoc to markdown and more.
• @vercel/agent-evalFramework for testing AI coding agents in isolated sandboxes
• @elastic/elasticsearch-mockMock utility for the Elasticsearch's Node.js client
• @apollo/react-testingReact Apollo testing utilities.
• chai-shallow-deep-equalShallow deep equal assertion for chai
• @cypress/webpack-batteries-included-preprocessorCypress preprocessor for bundling JavaScript via webpack with dependencies included and support for various ES features and TypeScript
• @argos-ci/storybookVisual testing for Storybook test runner.
• @marvelapp/react-ab-testA/B testing React components and debug tools. Isomorphic with a simple, universal interface. Well documented and lightweight. Tested in popular browsers and Node.js. Includes helpers for Mixpanel and Segment.com.
• grunt-mocha-testA grunt task for running server side mocha tests
• stablyAI-powered E2E Playwright testing CLI. Stably can understand your codebase, edit/run tests, and handle complex test scenarios for you.
• electron-mochaMocha tests in Electron.
• mock-local-storageMock localStorage for headless unit tests
• yaassertionYet another JavaScript assertion/invariant library.
• maildevSMTP Server and Web Interface for reading and testing emails during development
• @fluffy-spoon/substituteAn NSubstitute port to TypeScript called substitute.js.
• @stdlib/assert-is-uint8clampedarrayTest if a value is a Uint8ClampedArray.
• karma-qunitA Karma plugin. Adapter for QUnit testing framework.
• cypress-browser-permissionsA Cypress plugin package to handle setting common browser permissions like notifications, geolocation, images, and more
• @miragejs/graphqlA library for handling GraphQL requests with Mirage JS
• jest-marblesMarble testing helpers library for RxJs and Jest
• it-eachEnable basic async test looping in Mocha

• selenium-webdriver vs wd
• @appium/types vs selenium-webdriver
• msw vs json-server
• @copilotkit/aimock vs mock-socket
• @appium/types vs wd
• mockttp vs ts-mockito
• mock-socket vs ts-mockito
• rewire vs ng-mocks
• msw vs miragejs
• codeceptjs vs playwright-bdd
• codeceptjs vs nightwatch
• mocha vs jasmine-core
• mock-socket vs ng-mocks
• fast-check vs rewire
• ts-jest vs @golevelup/ts-jest