SELENIUM: Webdriver Listeners:

Web driver Listeners:

Whenever we talk about Webdriver we are doing some activity like type, click, navigate etc .These  all events which we  perform on our script .

In order to have more logs from the Webdriver so that you can debug your scripts or may be log more information about your tests.You must have always craved for more logs from the Webdriver so that you can debug your scripts or may be log more information about your tests. 

When we talk about Webdriver Listener so we should make a note of some classes and interfaces .

1- WebDriverEventListener – This is an interface, which have some predefined methods so we will implement all of these methods to catch the webdriver events.

2.EventFiringWebDriver- This is an class that actually fire Webdriver event

EventFiringWebDriver is used to wrap your webdriver around to throw events.

Example:

Create a new Class that will implement WebDriverEventListener methods

 package com.rameshsoft.rameshselenium;

 import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.support.events.WebDriverEventListener;

public class WebDriverListeners  implements WebDriverEventListene r{

          @Override

          public void afterChangeValueOf(WebElement arg0, WebDriver arg1,

                             CharSequence[] arg2) {

                   System.out.println("After change value is :"+arg0.toString());

}

@Override

          public void afterClickOn(WebElement arg0, WebDriver arg1) {

                   System.out.println("After click on webElement:"+arg0.toString());

          }

@Override

          public void afterFindBy(By arg0, WebElement arg1, WebDriver arg2) {

                   System.out.println("After findBy :"+arg0.toString());

                   }

          @Override

          public void afterNavigateBack(WebDriver arg0) {

                   System.out.println("After navigate back "+arg0.toString());

}

Now create your simple script, create EventFiringWebDriver object, and pass your driver object.

Create an object of the class who has implemented all the method of WebDriverEventListener so in our case WebDriverListeners  is a class who has implemented the same.

Now register that event using register method and pass the object of WebDriverListeners  class

package com.rameshsoft.rameshselenium;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.firefox.FirefoxDriver;

import org.openqa.selenium.support.events.EventFiringWebDriver;

public class WebDriverListenerDemo {

          public static void main(String[] args) throws InterruptedException {

                  

                   System.setProperty("webdriver.gecko.driver", "C:\\Users\\ramesh\\Desktop\\java\\desk\\geckodriver-v0.11.1-win64\\geckodriver.exe");

                   WebDriver driver=new FirefoxDriver();

                   EventFiringWebDriver efwd=new EventFiringWebDriver(driver);

                  

                   driver.manage().window().maximize();

                   driver.manage().timeouts().implicitlyWait(50,TimeUnit.SECONDS);

                   WebDriverListeners event=new WebDriverListeners();

                   efwd.register(event);

                   efwd.navigate().to("https://www.gmail.com");

          efwd.findElement(By.id("Email")).sendKeys("rameshsoft.selenium");

          efwd.findElement(By.id("next")).click();

          Thread.sleep(2000);

          efwd.findElement(By.id("Passwd")).sendKeys("12345");

                   efwd.findElement(By.id("signIn")).click();

                   efwd.quit();

                   efwd.unregister(event);

                   System.out.println("End of the script");

          }

}