How to use Selenium Grid easily in 3 Steps?

Selenium-Grid allows you run your tests on remote desktop against different Operating Systems like Windows,Linux,MAC and against different browsers like Opera,Safari,IE,Firefox and Chrome in parallel. Selenium-Grid allows running your tests in a distributed test execution environment.

Grid Architecture:

In Selenium-Grid, the Component Hub acts as a server receives the requests from Selenium WebDriver program and redirects requests to the Nodes which are configured to Hub. Refer to the details in the diagram mentioned below:

Grid Architecture

Installation:

Ensure the Selenium Standalone Server Jar is downloaded in Hub and Node Systems as well.
Download the Selenium Standalone Server Jar from this link -> http://selenium-release.storage.googleapis.com/index.html

Starting Hub:

The Hub is the central point that will receive all the test request and distribute them the the right nodes.
Open the new command line and execute the below command:
java -jar selenium-server-standalone-xxx.jar -role hub -port 4545

Starting Node 1:

Use the same http://selenium-release.storage.googleapis.com/index.html jar file to start the nodes and connect to the Hub.
Capabilities for Node 1:

Platform : WINDOWS
Browser Name: firefox
Browser Version:123

Open the new command line and execute the below command:

java -Dwebdriver.gecko.driver=”C:\\XXXX\\geckodriver-v0.23.0-win64\\geckodriver.exe”
-jar selenium-server-standalone-3.141.59.jar
-role webdriver
-browser “browserName=firefox,version=123,maxInstances=1,platform=WINDOWS”
-hubHost localhost
-hubPort 4444
-port 4546

Starting Node 2:

Use the same http://selenium-release.storage.googleapis.com/index.html jar file to start the nodes and connect to the Hub.
Capabilities for Node 2:

Platform : WINDOWS
Browser Name: chrome
Browser Version:40

Open the new command line and execute the below command:

java -Dwebdriver.chrome.driver=”C:\\XXXX\\chromedriver_win32\\chromedriver.exe”
-jar selenium-server-standalone-3.141.59.jar
-role webdriver
-browser “browserName=chrome,version=40,maxInstances=1,platform=WINDOWS”
-hubHost localhost
-port 4547

Selenium WebDriver Testng Program:

package totalqa;
import java.net.MalformedURLException;
import java.net.URL;
import org.openqa.selenium.Platform;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.annotations.Test;

public class GridEx {

	
	@Test
	public void executeTest() throws MalformedURLException
	{
		 DesiredCapabilities caps = new DesiredCapabilities();
		 caps.setBrowserName("firefox");
		 caps.setVersion("123");
		 caps.setPlatform(Platform.WINDOWS);
//               Comment below lines of code to execute tests on Chrome
//		 caps.setBrowserName("chrome");
//		 caps.setVersion("40");
//		 caps.setPlatform(Platform.WINDOWS);
		 RemoteWebDriver driver = new RemoteWebDriver(new URL("http://localhost:4444/wd/hub"),caps);
		 driver.get("http://www.google.com");
		 System.out.println(driver.getTitle());

	}
}

package totalqa;

import java.net.MalformedURLException;

import java.net.URL;

import org.openqa.selenium.Platform;

import org.openqa.selenium.remote.DesiredCapabilities;

import org.openqa.selenium.remote.RemoteWebDriver;

import org.testng.annotations.Test;

public class GridEx {

@Test

public void executeTest() throws MalformedURLException

{

DesiredCapabilities caps = new DesiredCapabilities();

caps.setBrowserName("firefox");

caps.setVersion("123");

caps.setPlatform(Platform.WINDOWS);

// Comment below lines of code to execute tests on Chrome

// caps.setBrowserName("chrome");

// caps.setVersion("40");

// caps.setPlatform(Platform.WINDOWS);

RemoteWebDriver driver = new RemoteWebDriver(new URL("http://localhost:4444/wd/hub"),caps);

driver.get("http://www.google.com");

System.out.println(driver.getTitle());

}

Results:

To check the ports which are reserved

To verify that the port number 4444 is in use. Execute the below command in the command line:
netstat -a -n | findStr 4444

Conclusion:

Selenium Grid is useful to run test cases remotely with specific capabilities.

Total-QA

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