One of the most popular web testing tools is Selenium, which allows you to easily write tests and automate web browsers using WebDriver. Selenium is also useful for many other tasks apart from testing, and you can read more about it at http://docs.seleniumhq.org/.
WebDriver is a protocol to remotely control web browsers, and you can read about it at https://w3c.github.io/webdriver/webdriver-spec.html.
Selenium uses real browsers, the same versions your users will access your web application with. This makes it excellent to get representative results, but it can cause issues if it runs from the command line in an unattended fashion. For example, you may find your test server's memory full of dead browser processes that ...
