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Test-Driven Java Development - Second Edition by Viktor Farcic, Alex Garcia

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It's not about testing

T in TDD is often misunderstood. TDD is the way we approach the design. It is the way to force us to think about the implementation and what the code needs to do before writing it. It is the way to focus on requirements and the implementation of just one thing at a time—organize your thoughts and better structure the code. This does not mean that tests resulting from TDD are useless—they are far from that. They are very useful and they allow us to develop with great speed without being afraid that something will be broken. This is especially true when refactoring takes place. Being able to reorganize the code while having the confidence that no functionality is broken is a huge boost to its quality.

The main objective ...

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