LXer: One programmer's unit test is another's integration test
 

Published at LXer:

The question of what units you are working with is one that will at one time or other have plagued anyone who studied a science or a branch of physical engineering. Teachers go to great lengths to make sure students remember to specify their units. It is not enough to say that the answer is 42. Forty-two what? 42 metres? 42 electronvolts? 42 furlongs per fortnight? Without a clear understanding of what units are involved, certain results and claims can be meaningless, misleading or simply expensive.

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