What’s the difference between white and black box testing?


Black-box testing is a way of testing software without having much knowledge of the internal workings of the software itself. Black box testing is often referred to as behavioral testing, in the sense that you want to test how the software behaves as a whole. It is usually done with the actual users of the software in mind, who usually have no knowledge of the actual code itself.

White box (aka clear box), on the other hand, is testing of the structural internals of the code – it gets down to the for loops, if statements, etc. It allows one to peek inside the ‘box’. Tasks that are typical of white box testing include boundary tests, use of assertions, and logging.

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