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)

Why integration testing?


In real-world software development, each application development is divided into a number of small modules. These modules will be developed by different developers. It's very important to find out how such separately developed modules when combined together are working. Each application is developed in different layers, such as UI, business layer, and DAO layer. In each layer, the data which is accepted, processed, and passed may be in a different format. So it's very important to find out whether the data passed and collected is correct or not, otherwise there will be a manipulation problem. Integration testing is also important as developers face a big problem in meeting continuous changes in requirement. Integration testing helps to find out problems of collaboration on layers at an early stage instead of getting it in later stages of development.

Let's implement this in our application to test form validation:

  1. Create a new JunitTest case TestAddController_standAlone...