Japa vs Jasmine

Japa is a free testing framework for Node.js backend applications and libraries, including JSON API and browser testing. Tests can be arranged into suites and groups with lifecycle hooks, filtering, asynchronous execution, datasets, snapshots, pinned tests, and bail mode. Assertion choices include Chai-based assert, Jest-style expect, and TypeScript type assertions. Its API client tests endpoints returning JSON, XML, HTML, or plain text, while an OpenAPI plugin checks responses against a schema. Browser testing uses a Playwright-based client with browser and context management, built-in assertions, and tracing options. Coverage reporting is documented with c8 or nyc. Japa has an official VS Code extension and an AdonisJS preset. It has no separate CLI; tests run from a configured entry point with Node.js or Bun. Setup occurs inside an existing Node.js project, where users select assertion libraries and optional plugins. Japa requires Node.js 18 or later, runs without transpilers, and works only with the ES module system.

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.