Network Throttling

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Test your website's functionality on low latency networks (2G/3G/LTE) or offline conditions. These networks have variable upload and download speeds that can alter how your website performs on different browsers.

To validate your website on such network profiles, simulate these network conditions using capabilities. If you want the test suite to start with the default network, use the preset capabilities. The device will have unobstructed internet connectivity.

KEY	VALUES	CAPABILITY
networkThrottling	Regular 4G, Regular 3G, Regular 2G, Good 3G, Good 2G, Offline, Reset, GPRS, DSL	Based on the user-provided input, this capability starts the test suite with the specified default network. For example, if the user selects Regular 4G, the capability looks like this: capabilities.setCapability("networkThrottling", "Regular 4G");

capabilities.setCapability("networkThrottling", "Regular 4G");

List of Network Profiles

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The following table lists all available preset network profiles with their speed and latency values.

CONDITION	MAX DOWNLOAD SPEED (KBPS)	MAX UPLOAD SPEED (KBPS)	LATENCY (MS)
Offline	0	0	0
Reset	Reset to default	Reset to default	Reset to default
GPRS	50	20	500
Regular 2G	250	50	300
Good 2G	450	150	150
Regular 3G	750	250	100
Good 3G	1 Mbps	750	20
Regular 4G	4 Mbps	3 Mbps	20
DSL	2 Mbps	1 Mbps	5

Custom Network Profile: Create custom network conditions using objects. Define the upload speed, max download speed, and latency for the custom condition, as shown in the table above.

Configuring Network Profile

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Use the Selenium JavaScript Executor to apply custom network throttling during tests.

// Using executeScript to apply custom network throttling
Map<String, Object> throttleParams = Map.of(
    "download", 500,  // Maximum download speed in kbps
    "upload", 100,    // Maximum upload speed in kbps
    "latency", 30     // Latency in ms
);

driver.executeScript("lambda-throttle-network", throttleParams);

TestMu AI allows you to select a network profile before running automation tests. This lets you conduct functional tests on low/high latency networks and offline. Use the networkProfile capability as shown below to simulate the network conditions.

JAVASCRIPT EXECUTOR COMMAND	REQUEST PARAMETERS	EXAMPLE
networkProfile	condition: a string or object representing browser network conditions	driver.execute_script("networkProfile", {"condition": {"download": 500,"upload": 100,"latency": 30}})

Configuring Network Throttling in Test Automation

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Define network throttle capabilities in your automation scripts to configure network throttling.

To configure network throttling in automation, use the TestMu AI TestNG GitHub repository to run automation tests.

Configuring Capabilities for Pre-defined Network Settings

DesiredCapabilities caps = new DesiredCapabilities();
caps.setCapability("browserName", "Chrome");
caps.setCapability("build", "Demo-TestNG");
caps.setCapability("name", "TestNG-Todo-Script-1");
caps.setCapability("networkThrottling", "Regular 4G");  //Set Network Speed to Regular 4G 

The following TestNG code validates your TestMu AI credentials for authentication. The code selects basic capabilities such as OS, browser, browser version, and network.

Configuring Custom Network Settings

package com.lambdatest;

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

import org.openqa.selenium.By;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.testng.Assert;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.BeforeSuite;
import org.testng.annotations.Test;

public class TestNGTodo1 {

	private RemoteWebDriver driver;
	private String Status="failed";

	@BeforeSuite
	public void setup() throws MalformedURLException {
		String username = System.getenv("LT_USERNAME");
		String authkey = System.getenv("LT_ACCESS_KEY");
		String hub = "@hub.lambdatest.com/wd/hub";

		DesiredCapabilities caps = new DesiredCapabilities();
		caps.setCapability("browserName", "Chrome");
		caps.setCapability("build", "Demo-TestNG");
		caps.setCapability("name", "TestNG-Todo-Script-1");
		caps.setCapability("networkThrottling", true);  //To enable network throttling
	
	driver = new RemoteWebDriver(new URL("https://" + username + ":" + authkey + hub), caps);

	// Custom network throttling using executeScript
        Map<String, Object> throttleParams = new HashMap<>();
        throttleParams.put("download", 500); // Maximum download speed in kbps
        throttleParams.put("upload", 100);   // Maximum upload speed in kbps
        throttleParams.put("latency", 30);   // Latency in ms
        
        // Use executeScript with the provided payload
        driver.executeScript("lambda-throttle-network", throttleParams);
	
	}


	@Test
	public void basicTest() throws InterruptedException {
		String spanText;
		System.out.println("Loading Url");
		Thread.sleep(100);
		driver.get("https://4dvanceboy.github.io/lambdatest/todo.html");
		Thread.sleep(100);

		System.out.println("Checking Box");
		driver.findElement(By.name("todo-1")).click();
		Thread.sleep(400);

		System.out.println("Checking Another Box");
		driver.findElement(By.name("todo-2")).click();
		Thread.sleep(400);

		System.out.println("Checking Box");
		driver.findElement(By.name("todo-3")).click();
		Thread.sleep(400);

		System.out.println("Checking Another Box");
		driver.findElement(By.name("todo-4")).click();
		Thread.sleep(400);

		driver.findElement(By.id("todotext")).sendKeys(" List Item 6");
		driver.findElement(By.id("addbutton")).click();
		Thread.sleep(200);

		driver.findElement(By.id("todotext")).sendKeys(" List Item 7");
		driver.findElement(By.id("addbutton")).click();
		Thread.sleep(200);

		driver.findElement(By.id("todotext")).sendKeys(" List Item 8");
		driver.findElement(By.id("addbutton")).click();
		Thread.sleep(200);

		System.out.println("Checking Another Box");
		driver.findElement(By.name("todo-1")).click();
		Thread.sleep(300);

		System.out.println("Checking Another Box");
		driver.findElement(By.name("todo-3")).click();
		Thread.sleep(300);

		System.out.println("Checking Another Box");
		driver.findElement(By.name("todo-7")).click();
		Thread.sleep(300);

		System.out.println("Checking Another Box");
		driver.findElement(By.name("todo-8")).click();
		Thread.sleep(300);

		System.out.println("Entering Text");
		driver.findElement(By.id("todotext")).sendKeys("Get Taste of Lambda and Stick to It");
		Thread.sleep(300);

		driver.findElement(By.id("addbutton")).click();

		System.out.println("Checking Another Box");
		driver.findElement(By.name("todo-9")).click();
		Thread.sleep(300);
		// Let's also assert that the todo we added is present in the list.

		spanText = driver.findElementByXPath("/html/body/div/div/div/ul/li[9]/span").getText();
		Assert.assertEquals("Get Taste of Lambda and Stick to It", spanText);
		Status="passed";
		Thread.sleep(150);

		System.out.println("TestFinished");

	}

	@AfterSuite
	public void tearDown() {
		driver.executeScript("lambda-status=" + Status);
		driver.quit();
	}

}

Find your defined network capabilities under the section 'Input Config' by navigating to the 'METADATA' section of your automation build-logs.

If you have any questions, feel free to share them with us. Our experts are available on 24/7 Customer chat support. You can also drop us a mail at [email protected]. Happy testing!