Data-Driven API Testing in Java With REST Assured and TestNG: Part 2

In the previous article , we explored how to implement data-driven testing using Object arrays and TestNG’s @DataProvider annotation. While this approach works well for small to medium-sized datasets, it is not ideal for handling large volumes of data. To address this limitation, TestNG also supports the use of Iterators , which provide a more efficient way to manage large and dynamic datasets. This article focuses on how to perform data-driven API automation testing using an Iterator with a DataProvider annotation of TestNG.