JUnit in Action

Chapter 7. Testing in isolation with mock objects

This chapter covers

• Introducing and demonstrating mock objects

• Performing different refactorings

• Using mock objects to verify API contracts on collaborating classes

• Practicing on an HTTP connection sample application

	The secret of success is sincerity. Once you can fake that you’ve got it made.
	--Jean Giraudoux

Unit-testing each method in isolation from the other methods or the environment is certainly a nice goal. But how do you perform this feat? You saw in chapter 6 how the stubbing technique lets you unit-test portions of code by isolating them from the environment (for example, by stubbing a web server, the filesystem, a database, and so on). But what about fine-grained isolation like being able ...