Nightwatch works with the Selenium standalone server so the first thing you need to do is download the selenium server jar file
selenium-server-standalone-2.x.x.jar from the Selenium releases page:
Install Node.js and then:
$ git clone https://github.com/nightwatchjs/nightwatch.git$ cd nightwatch$ npm install
The tests for Nightwatch are written using Mocha exports interface so they can also be run with Nightwatch itself.
To run the unit tests using mocha, do:
$ npm test
To run the unit tests using Nightwatch, do:
$ npm run unit-tests
To check test coverage, run the command:
$ npm run mocha-coverage
and then open the generate file coverage.html in your browser.