Running a Single Test Case in Multiple Browsers Simultaneously with Selenium WebDriver

Automation testers often need to run a single test case across multiple browsers to ensure that their web applications function correctly under different environments. Using Selenium WebDriver along with a robust testing framework can greatly simplify this process.

Overview of Selenium WebDriver

Selenium WebDriver is a powerful tool for automating web browsers. It allows you to control the browser and simulate user interactions. While Selenium WebDriver itself supports running tests sequentially, combining it with a testing framework such as TestNG (for Java) or pytest (for Python) enables parallel execution. This article will guide you through the process of running a single test case simultaneously on multiple browsers using both TestNG and pytest.

Using TestNG in Java for Parallel Execution

Step 1: Set up Your Project

To start, ensure that you have the necessary dependencies. You will need to add Selenium WebDriver and TestNG to your project dependencies.

Step 2: Create Your Test Class

Write a test case that you want to run across different browsers. Here is an example of how to set this up:

import ;import ;import ;import ;import ;import ;import ;import ;public class ParallelTest implements ITestListener {    WebDriver driver;    @Parameters({"browser"})    @BeforeMethod    public void setUp(ITestResult result, ITestContext context, String browser) {        if (browser.equalsIgnoreCase("chrome")) {            ("", "");            driver  new ChromeDriver();        } else if (browser.equalsIgnoreCase("firefox")) {            ("", "");            driver  new FirefoxDriver();        }        // Add other browsers as needed    }    @Test    public void testCase() {        // Your test logic here    }    @AfterMethod    public void tearDown(ITestResult result) {        if (driver ! null) {            driver.quit();        }    }}

Step 3: Configure TestNG for Parallel Execution

Create a testng.xml file to specify the browsers and parallel execution.

Step 4: Run Your Tests

Run your tests using TestNG, and it will execute the specified test case in parallel across the defined browsers.

Using pytest in Python for Parallel Execution

Step 1: Set Up Your Environment

Ensure that you have selenium and pytest installed. You can install them using pip:

pip install selenium pytest pytest-xdist

Step 2: Create Your Test Function

Write a test function that you want to run across different browsers. Here is an example of how to set this up:

from selenium import webdriverdef setup_browser(browser):    if browser  "chrome":        return (executable_path"")    elif browser  "firefox":        return (executable_path"")    else:        raise Exception(f"Unknown browser: {browser}")def test_example_case(browser):    driver  setup_browser(browser)    # Your test logic here    driver.quit()if __name__  "__main__":    from multiprocessing import Process    processes  []    for browser in ["chrome", "firefox"]:        p  Process(targettest_example_case, args(browser,))        ()        (p)    for p in processes:        ()

Step 3: Run Your Tests in Parallel

Run your tests using pytest with the -n 2 option to specify the number of parallel processes:

pytest -n 2

Summary

By following the steps above, you can run a single test case simultaneously across different browsers using Selenium WebDriver. The key is to utilize parallel execution features provided by the testing frameworks, either TestNG for Java or pytest for Python. Adjust the number of threads or processes based on your needs and the capabilities of your testing environment.

Keywords

Selenium WebDriver TestNG pytest Parallel Testing