In this article author introduces some of the basic concepts regarding eCATT and then you will learn how to develop a test script to upload a test data file with a practical example. So in precise in this article you will see what eCATT is, how we can use it; how we can load a test data from a file with an example. After reading this article you will have a clear idea about eCATT tool. And you will be able to write a test script in which test data can be loaded from a file. This article is divided into following sections.