Book Image

Learning Modular Java Programming

By : Tejaswini Mandar Jog
Book Image

Learning Modular Java Programming

By: Tejaswini Mandar Jog

Overview of this book

Modular programming means dividing an application into small parts and then developing it. It is an approach taken by developers to build applications and helps them add efficiency in their development process, thus making it more effective. The book starts with the fundamentals of Modular Programming. Then we move on to the actual implementation, where we teach developers how to divide an application into different modules or layers (such as presentation, execution, security, lifecycle, services, and so on) for better management. Once readers are well-versed in these modules and their development, the book shows how to create bindings in order to join these different modules and form a complete application. Next, the readers will learn how to manage these modules through dependency injection. Later, we move on to testing; readers will learn how to test the different modules of an application. The book ends by teaching readers how to maintain different versions of their application and how to modify it. By the end of the book, readers will have a good understanding of modular programming and will be able to use it to build applications with Java.
Table of Contents (15 chapters)

Mock testing


The testing which is carried out with the help of mock objects is called mock testing. There are a number of ways which provide the means for mock testing. Let's discover them one by one.

Spring testing framework

Spring provides an API to conduct testing using the mock technique in JUnit. Using this API, we can create mock objects of Request, Response, Filter, and HttpSession, which is otherwise available from the container. All those methods which are dependent on request or user's request and response can now be tested easily without a container. Using this API, tests can be created even before the development of the controller has been completed with mocking or stubbing.

Let's use it in our controller testing which we developed in Ch_05_jdbcTemplate_Transaction_Declarative as per the following cases:

Case1 – Inserting contact with correct values as per validation rules

Let's now write mock testing for the AddController with the help of the following steps to find out how mock...