"The secret of change is to focus all of your energy, not on fighting the old, but on building the new."
– Socrates
In today's world, Ajax plays an essential role in web application development. Google Web Toolkit (GWT) offers internationalization, cross-browser compatibility, Java coding, hosted mode for unit testing the client component in isolation from the server-side component, and so many things, for free. Unit testing the client-side business logic and building a JUnit safety net around the GWT code is very important for code quality and code maintenance. GWT code works with different Document Object Model (DOM) widgets and events; business logic gets tied up with the DOM widgets and events and makes it impossible to write unit test for the business logic. Mockito plays a key role in isolating the DOM widgets and events from the logic.
This chapter provides an overview of Ajax/GWT, explains the Model View Presenter (MVP) pattern and loose...