Data-Driven API Testing in Java With REST Assured and TestNG: Part 3

Data-driven testing enables testers to execute the same test logic with multiple sets of input data, improving coverage and reliability with minimal effort. By combining CSV files with TestNG’s @DataProvider   annotation, test data can be easily separated from the test logic. This approach enables maintainability and makes test automation more scalable and flexible. This article explains how to implement data-driven testing with CSV files and TestNG in a clear, practical, and easy-to-follow manner.