HeadlessBrowserTesting using HTMLUnitDriver in SeleniumWebDriver Java

-- Html Unit Driver is currently the fastest and most lightweight implementation of WebDriver.
-- As the name suggests, this is based on HtmlUnit.
-- HtmlUnit is a java based implementation of a web browser without a GUI.
-- HtmlUnit Driver is a well known Headless Browser driver.
-- HtmlUnit Driver is similar to the other drivers such as Mozilla Firefox, Google Chrome, Internet Explorer but you couldn’t see the GUI of Html UnitDriver.