SELENIUM Headless browser HtmlUnitDriver, phantomjs Tutorial

Launch HTMLUnitDriver & PhantomJS for Headless Browser Testing in Selenium:

What is a headless browser in Selenium?

The headless browser is a web browser, which has no graphical user interface.

Headless browsers offer automatic control over a web page in an environment like a popular web browser, but are executed through command line interfaces or network communications.

Types of Headless Driver’s:

HtmlUnit
PhantomJS
Ghost
ZombieJS

1. HTMLUnitDriver:

HTML UnitDriver is the lightest weight and fastest implementation browser for WebDriver, based on HtmlUnit, it is known as a headless browser driver, it is similar to a Chrome, IE, or FireFox driver.

Does not have a GUI, so the screen can not see test execution on screen.

Features of HTML Unit Driver:

Speed and performance improvements.

Allows to test browserless setup.

Support for HTTPS and HTTP protocols.

Helps you in multitask.

Help for cookies.

Excellent JavaScript Support.

Initialize HtmlUnitDriver:

WebDriver driver = new HtmlUnitDriver();

1	WebDriver driver = new HtmlUnitDriver();

Example of Launching HtmlUnitDriver:

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;

public class InternetExplorerDriver{

   public static void main(String[] args) {

         WebDriver driver=new HtmlUnitDriver();

         driver.get("https://www.stqatools.com");

         System.out.println("Title is :-"+driver.getTitle());

         driver.close();
      }
}

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.htmlunit.HtmlUnitDriver;

public class InternetExplorerDriver{

public static void main(String[] args) {

WebDriver driver=new HtmlUnitDriver();

driver.get("https://www.stqatools.com");

System.out.println("Title is :-"+driver.getTitle());

driver.close();

}

Output:

Title is :- Software Testing Quality Automation Tutorials

1	Title is :- Software Testing Quality Automation Tutorials

2. PhantomJS:

PhantomJS is a headless browser with Javascript APIs Headless Website is an optimal solution for manipulation, access and webpages and comes with standard DOM API.

PhantomJS gives you the advantage of capturing screenshots so that you can override the user-agent string header from the related server and copy the next browser.

The latest release of PhantomJS has integrated GhostDriver and there is no need to install it separately.

GhostDriver is a pure JavaScript implementation, which is the WebDrive Wire Protocol for PhantomJS.

Features of PhantomJS:

Able to Headless Testing.

Screen capture Capability.

Able to Network monitoring.

To run a unit test on the command line.

To prepare an employee manual for PDF from HTML.

Development is very easy with PhantomJS, when you develop UI, you can write code by selecting the HTML element.

Testers need to do manual testing, which seems easy with the PhantomJS.

Download PhantomJS:

To Download click on this link to download Windows, Mac OS X, Linux 64-bit, Linux 32-bit OS drivers.

Example of Launching PhantomJS:

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.phantomjs.PhantomJSDriver;
import org.openqa.selenium.phantomjs.PhantomJSDriverService;
import org.openqa.selenium.remote.DesiredCapabilities;

     public class While_Java {

     public static void main(String[] args) {

            DesiredCapabilities caps = new DesiredCapabilities();

            caps.setJavascriptEnabled(true);

            caps.setCapability(PhantomJSDriverService.PHANTOMJS_EXECUTABLE_PATH_PROPERTY, "C://phantomjs.exe");

            caps.setCapability("takesScreenshot", true);

            WebDriver driver = new PhantomJSDriver(caps);

            driver.get("https://www.stqatools.com");

            driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

            String title = driver.getTitle();

            System.out.println(title);
    }

}

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.phantomjs.PhantomJSDriver;

import org.openqa.selenium.phantomjs.PhantomJSDriverService;

import org.openqa.selenium.remote.DesiredCapabilities;

public class While_Java {

public static void main(String[] args) {

DesiredCapabilities caps = new DesiredCapabilities();

caps.setJavascriptEnabled(true);

caps.setCapability(PhantomJSDriverService.PHANTOMJS_EXECUTABLE_PATH_PROPERTY, "C://phantomjs.exe");

caps.setCapability("takesScreenshot", true);

WebDriver driver = new PhantomJSDriver(caps);

driver.get("https://www.stqatools.com");

driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

String title = driver.getTitle();

System.out.println(title);

}