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A test is not a unit test if
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A test is not an unit test if: | |
* it talks to the database | |
* it communicates across the network | |
* it touches the file system | |
* it can’t run at the same time as any of your other unit tests | |
* you have to do special things to your environment (such as editing config files) to run it | |
Tests that do these things aren’t bad. Often they are worth writing, and they can be written in a unit test harness. However, it is important to keep them separate from true unit tests so that we can run the unit tests quickly whenever we make changes. | |
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by Michael Feathers | |
http://www.artima.com/weblogs/viewpost.jsp?thread=126923 |
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