Tuesday, 29 January 2013

Selenium GRID with WebDriver

Selenium Grid is a tool that dramatically speeds up functional testing of web-apps by leveraging your existing computing infrastructure. It allows you to easily run multiple tests in parallel, on multiple machines, in an heterogeneous environment.

Stop waiting hours to get the results of your web acceptance builds! Selenium Grid transparently distribute your tests on multiple machines so that you can run your tests in parallel, cutting down the time required for running in-browser test suites. This will dramatically speeds up in-browser web testing, giving you quick and accurate feedback you can rely on to improve your web application.


How to Configure Selenium GRID

1) Download latest Selenium-server-standalone-2.25.0.jar
2) Download TestNG (should have TestNG framework)
3) Download ChromeDriver.exe

Test Script

package testNG;

import java.net.MalformedURLException;
import java.net.URL;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebDriverBackedSelenium;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;

import com.thoughtworks.selenium.Selenium;

import junit.framework.Assert;

public class Google {

 private Selenium selenium;

 @Parameters({"browser","port"})

 @BeforeClass
 public void beforeClass(String browser,String port){
  DesiredCapabilities capability= new DesiredCapabilities();
  capability.setBrowserName(browser);
  try {
   WebDriver driver= new RemoteWebDriver(new URL("http://localhost:".concat(port).concat("/wd/hub")), capability);
   selenium = new WebDriverBackedSelenium(driver, "http://www.google.com");
  } catch (MalformedURLException e) {
    
   e.printStackTrace();
  }
 }
  
 @Test
 public void search() {
  selenium.open("/");
  selenium.type("id=lst-ib", "testing");
  selenium.click("//input[@value='Google Search']");
  }

 @AfterClass
 public void afterClass(){
  selenium.stop();
 }
  
}

Create the TestNG.xml file by copying the below code: 

<?xml version="1.0" encoding="UTF-8"?>
<suite name="Suite" parallel="tests"
    thread-count="5">

    <test name="Selenium TestNG - 1">
        <parameter name="browser" value="firefox" />
        <parameter name="port" value="4444" />
        <classes>
            <class name="testNG.Google" />
        </classes>
    </test>
    <test name="Selenium TestNG - 2">
        <parameter name="browser" value="chrome" />
        <parameter name="port" value="4444" />
        <classes>
            <class name="testNG.Google" />
        </classes>
    </test>

</suite>

Now run the Test Suite by right clicking the TestNG.xml file from eclipse

Just Before running the script you should run Selenium-Grid server

Selenium-Grid server

For Hub:
java -jar selenium-server-standalone-2.25.0.jar -role hub


For a firefox based node:
java -jar selenium-server-standalone-2.25.0.jar -role webdriver -hub http://localhost:4444/grid/register -port 5556 -browser browserName=firefox

For Google-Chrome based node:

java -Dwebdriver.chrome.driver="C:\.......\chromedriver.exe" -jar selenium-server-standalone-2.25.0.jar -role webdriver -hub http://localhost:4444/grid/register -port 5555 -browser browserName=chrome

11 comments:

  1. it is not connecting to the remote computer what to do,it is not showing any issue also please help me out from this

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