From the Nightwatch.js website:
Nightwatch.js is an easy to use Node.js based End-to-End (E2E) testing solution for browser based apps and websites.
It uses the powerful Selenium WebDriver API to perform commands and assertions on DOM elements.
Features
Simple but powerful syntax which enables you to write tests very quickly, using
only Javascript and CSS selectors. No need to initialize other objects and
classes, you only need to write the test specs.Built-in command-line test runner which enables you to run the tests either
altogether, by group or single.Manages the Selenium server automatically; can be disabled if Selenium runs on
another machine.Continous Integration support: JUnit XML reporting is built-in so you can
integrate your tests in your build process with systems suchs as Hudson or
Teamcity.Use CSS selectors or Xpath to locate and verify elements on the page or execute
commands.Easy to extend if you need to implement your own commands specific to your
application.