Mocking the Service Agent

Abstract

When you last worked on the MovieBrowser sample application in Chapter 10, you completed an application that displayed data bound to a ViewModel and used events of that ViewModel to trigger navigation, giving the appearance of an application that is complete but with sample data. Since completing that work, you have learned about Inversion of Control, the asynchronous programming model, and service agents. In this chapter, I will discuss the design of the interface for your service agent, you will choose an approach for how the MovieBrowser service agent will do its job, and finally you will create a service agent and modify the ViewModel for the MovieBrowser application to use this service agent. The service agent that you create in this chapter still will not interact with real data, but the application will complete with the exception of creating the “live” service agent that you will implement in Chapter 16.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours. —John Locke