Tutorial 33 – Run Parallel Selenium Tests In Firefox Browser using Docker Compose
Please read the previous article before reading this one.
Let us now see how to execute the tests in parallel on firefox browsers.
Edit Test1.java as shown below
Let us cd to directory where we have placed .yml file
Start docker engine by double clicking docker desktop icon
Wait for the docker engine to start.
Let us now bring down the containers
The tests in below xml point to same Test1.java
Save xml.
Let us spin up 2 firefox containers
Execute testng.xml
Launch http://localhost:4444
Notice below 2 concurrent firefox sessions are running 
Notice 2 firefox sessions
The tests pass
Bring down the containers
Snapshot (testng xml to execute Test1 in 2 parallel firefox sessions)
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd" >
<suite name="suite" parallel="tests">
<test name="ff1">
<classes>
<class name="sel4scripts.Test1" />
</classes>
</test>
<test name="ff2">
<classes>
<class name="sel4scripts.Test1" />
</classes>
</test>
</suite>
Code snippet (Test1.java for firefox browser)
package sel4scripts;
import java.net.MalformedURLException;
import java.net.URL;
import org.openqa.selenium.By;
import org.openqa.selenium.firefox.FirefoxOptions;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.annotations.Test;
public class Test1 {
@Test
public void TestParallel() throws MalformedURLException, InterruptedException
{
//ChromeOptions opt = new ChromeOptions();
FirefoxOptions opt = new FirefoxOptions();
WebDriver driver = new RemoteWebDriver(new URL("http://localhost:4444"),opt);
driver.get("http://google.com");
driver.findElement(By.name("q")).sendKeys("Learning Standalone grid");
System.out.println("Test executed successfully");
}
}
Thank you for reading!