Java Reference
In-Depth Information
Testing with mock objects
Programming today is a race between software
engineers striving to build bigger and better idiot-proof
programs, and the Universe trying to produce bigger
and better idiots. So far, the Universe is winning.
—Rich Cook
This chapter covers
Introducing and demonstrating mock objects
■
Performing different refactorings
■
Practicing on the HTTP connection sample
application
■
Introducing the EasyMock and the JMock
libraries
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Unit testing each method in isolation from the other methods or the environment
is certainly a nice goal. 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 file system, a database,
and so on). What about fine-grained isolation, like being able to isolate a method
call to another class? Is that possible? Can you achieve this without deploying huge
amounts of energy that would negate the benefits of having tests?
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