Nightwatch.js is an integrated testing framework powered by Node.js and using the W3C Webdriver API. It provides a complete testing solution and can be used for a wide range of testing needs, including: * End-to-end testing of web applications and websites, on both desktop and mobile devices. * Component testing in isolation (React / Vue / Storybook / Angular). * Unit testing, Visual Regression testing, Accessibility testing, and API testing. * Native mobile app testing on Android & iOS.