Testing

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• specAn event-driven JavaScript unit testing library.
• vitest-canvas-webgl-mockMock both 2D and WebGL contexts in Vitest.
• unexpected-knexSupport for testing Knex.js models and migrations using Unexpected
• @stdlib/ndarray-base-assert-is-boolean-index-data-typeTest if an input value is a supported ndarray boolean index data type.
• @stdlib/ndarray-base-assert-is-floating-point-data-typeTest if an input value is a supported ndarray floating-point data type.
• pixl-unitA very simple unit test runner for Node.js.
• wait-for-throwableSimple utility to retry an erroring function until it succeeds
• mock-react-reduxMocks out Redux actions and selectors for clean React Jest tests.
• @stdlib/ndarray-base-assert-is-numeric-data-typeTest if an input value is a supported ndarray numeric data type.
• @stdlib/ndarray-base-assert-is-mask-index-data-typeTest if an input value is a supported ndarray mask index data type.
• chai-equal-jsxJSX assertions for Chai
• @prismatic-io/luxCoding-agent evaluation and improvement with deterministic assertions, optional LLM judges, and first-class human-in-the-loop runs.
• @stdlib/ndarray-base-assert-is-integer-data-typeTest if an input value is a supported ndarray integer data type.
• @stdlib/ndarray-base-assert-is-integer-index-data-typeTest if an input value is a supported ndarray integer index data type.
• pseudo-l10nEasy-to-use pseudo-localization generator for testing i18n implementations. Adds accented characters, text expansion, and visual markers to help identify localization issues.
• @stdlib/ndarray-base-assert-is-output-data-type-policyTest if an input value is a supported ndarray output data type policy.
• sinon-bluebirdPlugin that adds Bluebird Promise helper methods to Sinon.
• assert-fs-readfile-optionTest if value is valid for fs.readFile option
• chai-backboneBackbone assertions for the Chai assertion library
• @opengsd/gsd-browserBrowser automation CLI powered by Chrome DevTools Protocol — 92 commands for navigation, interaction, live viewing, annotations, recording bundles, screenshots, accessibility, network mocking, visual diffing, and more.
• chai-assert-changean assertion against a change to a value
• doubleagentA superagent based async/await friendly testing util
• qiksy-mcpBrowser MCP server for the Chrome tab you already have open — your session, your logins. Gives Claude Code, Cursor, Codex and VS Code the live page: findings, forms, failed requests with server bodies.
• ai-ready-pw-codegenAI-Ready PW Codegen — offline Playwright recorder with snapshots for AI-powered test generation
• simplehttpserverSimple HTTP Server for static files. Intended as testing and development tool
• jquery-test-runnerA test runner built by the jQuery team to run QUnit tests in real browsers using Selenium and BrowserStack
• eth-testingA set of tools in order to generate a mock Web3 Provider and simulate blockchain interactions in tests.
• redux-test-beltJavaScript Testing utilities for Redux, the easy way.
• loki-modeLoki Mode by Autonomi. Autonomous spec-to-product system: takes a PRD, GitHub issue, OpenAPI/JSON/YAML, or one-line brief to a deployed app via the RARV-C closure loop with 8 quality gates. Provider-agnostic (Claude Code, OpenAI Codex, Cline, Aider, openc
• @mendix/pluggable-widgets-toolsMendix Pluggable Widgets Tools
• tigrmailAPI client for creating temporary email addresses to use in your E2E tests with Playwright, Cypress, and other frameworks.
• ember-cli-fake-serverAn addon to simplify stubbing ajax requests and responses in ember tests.
• @codeceptjs/mock-requestMocking requests with PollyJS for CodeceptJS
• type-testerA tester to check expected type errors
• travis-covMocha/blanket coverage reporter for travis-ci.
• bun-mock-prismaA simple and type-safe mocking utility for Prisma Client in Bun tests
• vitest-auto-mockLibrary for mocking dependencies in Vitest with TypeScript without need to provide a path.
• supabase-testsupabase-test offers isolated, role-aware, and rollback-friendly PostgreSQL environments for integration tests with Supabase defaults baked in
• @prb/testModern collection of testing assertions and logging utilities for Solidity
• window-mockA light-weight window mock for Node/io.js unit-testing
• @supunlakmal/hooksA collection of reusable React hooks
• creeveyCross-browser screenshot testing tool for Storybook with fancy UI Runner
• @graphql-mocks/network-playwrightMock using graphql-mocks with Playwright
• eslint-config-bloqCommon ESLint config used at Bloq
• omniusAI coding agent powered by open-source models (Ollama/vLLM) — interactive TUI with agentic tool-calling loop
• great-ctoOne command install for the great_cto Claude Code plugin. Auto-detects your stack, picks the right archetype, bootstraps PROJECT.md.
• @stdlib/assert-is-uriTest if a value is a URI.
• @web/test-runner-seleniumSelenium browser launcher for Web Test Runner
• @anshulsanghi/googlemaps-vitest-mocks## Forked from https://github.com/googlemaps/js-jest-mocks
• @stdlib/ndarray-base-assert-is-row-major-stringTest whether an input value is the string representing row-major order.

• 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