Chai

Vitest

vitest-dev/vitest

TrendingPopular

Vite-native test runner with a Jest-compatible API and real-browser mode; the default for new projects.

Jest

jestjs/jest

Popular

Long-standing JavaScript test runner with snapshots and mocking; still huge, though Vitest wins new projects.

Mocha

mochajs/mocha

Flexible, long-standing Node.js test framework usually paired with Chai and Sinon; common in older codebases.

Node.js Test Runner

nodejs.org

Rising

Built-in node:test module with mocking, coverage and watch mode; zero-dependency testing for Node libraries.

Bun

oven-sh/bun

Trending

All-in-one JavaScript runtime, package manager, bundler and test runner focused on speed.

Jasmine

jasmine/jasmine

Legacy

Batteries-included BDD framework long tied to Angular; declining since Angular moved its default to Vitest.

Karma

karma-runner/karma

Legacy

Browser test launcher formerly standard for Angular; deprecated, migrate to Vitest browser mode or Web Test Runner.

ava

avajs/ava

Node.js test runner that lets you develop with confidence