Data-Driven Testing in Selenium Using Excel and TestNG

Introduction

Data-driven testing is a core automation strategy that allows testers to execute test cases with multiple sets of data. This technique reduces code duplication and improves test coverage. In this tutorial, we’ll demonstrate how to implement data-driven testing in Selenium with Java and TestNG, using Apache POI to read data from an Excel file.

Prerequisites

• JDK installed
• Maven setup
• Selenium WebDriver
• TestNG
• Apache POI library
• A sample Excel file (e.g., TestData.xlsx)

Step 1. Add Maven Dependencies.

Step 2. Create Excel Data Reader Utility.

Step 3. Create a Test with a DataProvider.

Step 4. Sample Excel File Format.

Step 5. Run the Test.

Run the test with TestNG. You should see the login attempt for each username, password pair in the Excel sheet.

Conclusion

Data-driven testing makes your test suite more powerful and flexible. Integrating it with Selenium and TestNG is straightforward using Apache POI. This method can be further extended to cover more complex input and validation scenarios.