Tutorial 23 - Selenium 4 Grid Standalone mode
Let us now see the first mode viz Standalone Selenium 4 grid mode (both hub and node on same machine)
Go to the official download page https://www.selenium.dev/downloads/
Download the latest stable version of Selenium server
Next, cd to the location where you have downloaded the jar and execute the command java –jar <.jar filename> as shown below. You would see a list of commands available
One of the commands that you see above is ‘standalone’.
To start the standalone grid server, execute the command java –jar <.jar filename> standalone
Notice below that the grid server automatically detects the 2 browsers
Also notice that our standalone grid server starts at the url http://192.168.33.1:4444
Launch this url.
Notice below the grid page that shows windows with chrome and windows with firefox browsers. None of the session is running right now
Click the 
icon, we see a popup with grid server details
Click ‘Sessions’ on the left hand side, notice that there are no running sessions at this moment
Let us see how to execute our test script on this grid server. Before we see that, we have to first download the latest stable chrome browser executable
Click documentation, you will be redirected to below page
https://chromedriver.chromium.org/
Click stable release link that you see above
Download the zip file and extract it.
Place the chromedriver jar in the same location where you have kept the selenium grid jar
Open command prompt and cd to above location, start the standalone grid server
Create a new class file, see below.
This simple code will create a new session of remote webdriver and our script will be executed on grid
Run the script
See below, 1 session is started
Notice below, session is started on chrome browser
Similarly, download the firefox executable
Comment chrome options line and add firefox options line
Run
Notice below, the capabilities column now shows that our test is running on firefox browser
Since our grid server is running on windows localhost, we can also change the url to http://localhost:4444 as shown below
So this is how we can execute our test in a standalone grid server.
Code snippets
package sel4scripts;
import java.net.MalformedURLException;
import java.net.URL;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxOptions;
import org.openqa.selenium.remote.RemoteWebDriver;
public class GridStandaloneMode {
public static void main(String[] args) throws MalformedURLException, InterruptedException {
//ChromeOptions opt = new ChromeOptions();
FirefoxOptions opt = new FirefoxOptions();
WebDriver driver = new RemoteWebDriver(new URL("http://192.168.33.1:4444"),opt);
driver.get("http://google.com");
driver.findElement(By.name("q")).sendKeys("Learning Standalone grid");
Thread.sleep(3000);
}
}
Thank you for reading!