Jasmine vs Testem

Jasmine is a free, open-source framework for testing JavaScript code in browsers and Node.js. Tests use JavaScript’s describe/it structure and expect matchers. The jasmine-core package has no external dependencies, and the framework does not rely on other JavaScript frameworks. For Node, developers can install the package locally with npm and run it using npx jasmine; the standalone distribution runs browser specs without other tools or a web server. Jasmine supports ES modules, and its Node setup can also load CommonJS modules. The jasmine-browser-runner supports interactive browser runs and CI execution with headless Chrome or Sauce Labs. It can also connect to Sauce Labs or a user’s own Selenium Grid as a remote browser grid. Runners can be configured, reporters and matchers customized, and spec order randomized. The project lists JavaScript and TypeScript support, parallel execution and built-in mocks. Browser and Node compatibility follows a rolling window, so older platforms may receive best-effort support or be dropped in minor releases. The FAQ notes that the unmaintained karma-jasmine adapter depends on jasmine-core 4.x, which can limit access to newer Jasmine features. The project uses the MIT License and directs users to GitHub for issues and contributions.

Testem is a JavaScript test runner for running tests in Node.js, real desktop browsers, or a launcher you configure. It supports Jasmine, QUnit, Mocha, and custom framework adapters, and can be used for unit, integration, end-to-end-style, or custom test setups. Browser runs can use Chrome, Firefox, Safari, or Edge, including a Headless Chrome launcher. In development mode, a terminal interface watches project files and reruns tests after relevant changes; CI mode can run tests in available browsers in parallel. Testem includes CI reporters for TAP, dot, xunit, and TeamCity, with custom reporters available. Listed preprocessing support includes Babel, TypeScript, Browserify, ESLint, JSHint, JSLint, and CoffeeScript. Its API provides startDev, startCI, and startServer modes, and coverage reporting is supported. It works with GitHub Actions, Jenkins, and TeamCity. Testem is free and open source under the MIT license, and runs on Linux, macOS, and Windows. It requires a supported Node.js runtime: ^22.17.0, ^24.0.0, or >=26.0.0.