Selenium With TestNG Tutorial
In this topic, you will learn how to configure and run tests using TestNG on TestMu AI's Selenium testing cloud platform.
Objectives
By the end of this topic, you will be able to:
- Set up an environment for testing your hosted web pages using TestNG framework with Selenium.
- Understand and configure the core capabilities required for your Selenium test suite.
- Run test cases in parallel using TestNG with Selenium to reduce build times.
- Test your locally hosted pages on TestMu AI platform.
- Explore advanced features of TestMu AI.
All the code samples in this documentation can be found on TestMu AI's Github Repository. You can either download or clone the repository to quickly run your tests. 
View on GitHub
Prerequisites
Before you can start performing Java automation testing with Selenium, you would need to:
-
Install the latest Java development environment. We recommend to use Java 11 version.
-
Download the latest Selenium Client and its WebDriver bindings from the official website. Latest versions of Selenium Client and WebDriver are ideal for running your automation script on TestMu AI Selenium cloud grid.
-
Install Maven which supports TestNG framework out of the box. Maven can be downloaded and installed following the steps from the official website. Maven can also be installed easily on Linux/MacOS using Homebrew package manager.
Cloning Repo and Installing Dependencies
Step 1: Clone the TestMu AI�s Java-TestNG-Selenium repository and navigate to the code directory as shown below:
git clone https://github.com/LambdaTest/Java-TestNG-Selenium
cd Java-TestNG-Selenium
You may also want to run the command below to check for outdated dependencies.
mvn versions:display-dependency-updates
Setting up your Authentication
Make sure you have your TestMu AI credentials with you to run test automation scripts on TestMu AI Selenium Grid. You can obtain these credentials from the TestMu AI Automation Dashboard or through TestMu AI Profile.
Step 2: Set TestMu AI Username and Access Key in environment variables.
- Linux / MacOS
- Windows
export LT_USERNAME="undefined" \
export LT_ACCESS_KEY="undefined"
set LT_USERNAME="undefined" `
set LT_ACCESS_KEY="undefined"
Run Your First Test
Sample Test with TestNG
import org.openqa.selenium.By;
import org.openqa.selenium.Platform;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import java.net.MalformedURLException;
import java.net.URL;
public class TestNGTodo{
public String username = "YOUR_LAMBDATEST_USERNAME";
public String accesskey = "YOUR_LAMBDATEST_ACCESS_KEY";
public static RemoteWebDriver driver = null;
public String gridURL = "@hub.lambdatest.com/wd/hub";
boolean status = false;
@BeforeClass
public void setUp() throws Exception {
DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("browserName", "chrome");
capabilities.setCapability("version", "70.0");
capabilities.setCapability("platform", "win10"); // If this cap isn't specified, it will just get the any available one
capabilities.setCapability("build", "<BrandName />SampleApp");
capabilities.setCapability("name", "<BrandName />JavaSample");
try {
driver = new RemoteWebDriver(new URL("https://" + username + ":" + accesskey + gridURL), capabilities);
} catch (MalformedURLException e) {
System.out.println("Invalid grid URL");
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
@Test
public void testSimple() throws Exception {
try {//Change it to production page
driver.get("https://lambdatest.github.io/sample-todo-app/");
//Let's mark done first two items in the list.
driver.findElement(By.name("li1")).click();
driver.findElement(By.name("li2")).click();
// Let's add an item in the list.
driver.findElement(By.id("sampletodotext")).sendKeys("Yey, Let's add it to list");
driver.findElement(By.id("addbutton")).click();
// Let's check that the item we added is added in the list.
String enteredText = driver.findElementByXPath("/html/body/div/div/div/ul/li[6]/span").getText();
if (enteredText.equals("Yey, Let's add it to list")) {
status = true;
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
@AfterClass
public void tearDown() throws Exception {
if (driver != null) {
((JavascriptExecutor) driver).executeScript("lambda-status=" + status);
driver.quit();
}
}
}
Configuring your Test Capabilities
Step 3: In the test script, you need to update your test capabilities. In this code, we are passing browser, browser version, and operating system information, along with TestMu AI Selenium grid capabilities via capabilities object. The capabilities object in the above code are defined as:
DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("browserName", "chrome");
capabilities.setCapability("version", "70.0");
capabilities.setCapability("platform", "win10"); // If this cap isn't specified, it will just get the any available one
capabilities.setCapability("build", "<BrandName />SampleApp");
capabilities.setCapability("name", "<BrandName />JavaSample");
You can also use dev and beta browser versions. To generate capabilities for your test requirements, you can use our inbuilt ?? Capabilities Generator Tool.
Executing the Test
Step 4: The tests can be executed in the terminal using the following command.
mvn test -D suite=single.xml
Your test results would be displayed on the test console (or command-line interface if you are using terminal/cmd) and on TestMu AI automation dashboard. TestMu AI Automation Dashboard will help you view all your text logs, screenshots and video recording for your entire automation tests.
Run Parallel Tests Using TestNG
Setting up the Parallel Environment
Here is an example xml file which would help you to run a single test on various browsers at the same time, you would also need to generate a testcase which makes use of TestNG framework parameters (org.testng.annotations.Parameters).
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite thread-count="3" name="LambaTestSuite" parallel="tests">
<test name="WIN8TEST">
<parameter name="browser" value="firefox"/>
<parameter name="version" value="62.0"/>
<parameter name="platform" value="WIN8"/>
<classes>
<class name="LambdaTest.TestNGToDo"/>
</classes>
</test> <!-- Test -->
<test name="WIN10TEST">
<parameter name="browser" value="chrome"/>
<parameter name="version" value="79.0"/>
<parameter name="platform" value="WIN10"/>
<classes>
<class name="LambdaTest.TestNGToDo"/>
</classes>
</test> <!-- Test -->
<test name="MACTEST">
<parameter name="browser" value="safari"/>
<parameter name="version" value="11.0"/>
<parameter name="platform" value="macos 10.13"/>
<classes>
<class name="LambdaTest.TestNGToDo"/>
</classes>
</test> <!-- Test -->
</suite>
Executing Parallel Tests using TestNG
To run parallel tests using TestNG, we would have to execute the below commands in the terminal:
- For the above example code
mvn test - For the cloned Java-TestNG-Selenium repo used to run our first sample test
mvn test -D suite=parallel.xml
Your test results would be displayed on the test console (or command-line interface if you are using terminal/cmd) and on TestMu AI automation dashboard.
Testing Locally Hosted or Privately Hosted Projects
You can test your locally hosted or privately hosted projects with TestMu AI Selenium grid cloud using TestMu AI Tunnel app. All you would have to do is set up an SSH tunnel using TestMu AI Tunnel app and pass toggle tunnel = True via desired capabilities. TestMu AI Tunnel establishes a secure SSH protocol based tunnel that allows you in testing your locally hosted or privately hosted pages, even before they are made live.
Refer our 🔗 TestMu AI Tunnel documentation for more information.
Here's how you can establish TestMu AI Tunnel.
Open command prompt and navigate to the binary folder.
Run the following command:
./LT -user {user�s login email} -key {user�s access key}
So if your user name is [email protected], the command would be:
./LT -user [email protected] -key undefined
Once you are able to connect TestMu AI Tunnel successfully, you would just have to pass on tunnel capabilities in the code as shown:
DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("tunnel", true);
Using the TestNG Agent Skill with TestMu AI
The testng-skill is a part of TestMu AI Skills that guide AI coding assistants in generating production-ready test automation.
The testng-skill package includes:
testng-skill/
├── SKILL.md
└── reference/
├── playbook.md
└── advanced-patterns.md
It provides structured guidance for:
- Project structure and setup
- Dependency configuration
- Local execution
- TestMu AI cloud execution
- Debugging patterns
- CI/CD integration
Installing TestNG Agent Skill
Install a TestNG Agent Skill using the command below:
# Clone the repo and copy the skill you need
git clone https://github.com/LambdaTest/agent-skills.git
cp -r agent-skills/testng-skill .claude/skills/
# Or for Cursor / Copilot
cp -r agent-skills/testng-skill .cursor/skills/
Note: If you prefer installing all available framework skills instead of only testng-skill, clone the repository directly into your tool's skills directory (for example, .claude/skills/, .cursor/skills/, .gemini/skills/, or .agent/skills/).
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