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  Tutorial: Approaches to Mocking

Approaches to Mocking Extreme Programming (XP) is a greater emphasis on unit testing. Axiomatic to the success of unit tests is the fact that they are meant to be very fine-grained, ideally dealing with each method on a single object in turn. This is fi

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mock objects may appear to roam in many different flavors, gently grazing upon the verdant expanse of developer mindshare, but all of these flavors can be broken down into two broad camps: static and dynamic mocks. A static mock object is either written by hand or generated automatically at some stage in a program\'s development (possibly at compile time), while dynamic mocks either rely on a proxy interface, provided by java.lang.reflect.Proxy or byte code manipulation, or alternatively, some sort of Aspect-Oriented Programming (AOP) magic.
the method is going to be extremely difficult to test using static mocks, because there\'s no easy way of ensuring that they get used without having extremely verbose unit tests. The patterns and practices that are adopted to make unit testing simpler, such as Inversion of Control (IoC) (popularized in the Avalon project) and refactoring can be used here in order to create some code better-suited to unit testing. The method could be refactored by placing the call to obtain an instance of the UserManager within a separate method


 

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