In this chapter, we'll focus on two aspects of testing for scientific programming. The first aspect is the often difficult topic of what to test in scientific computing. The second aspect covers the question of how to test. We will distinguish between manual and automated testing. Manual testing is what is done by every programmer to quickly check that a program is doing what it should or should not. Automated testing is the refined, automated variant of that idea. We will introduce some tools available for automatic testing in general, with a view of the particular case of scientific computing.

15.1 Manual testing

During code development, you do a lot of small tests in order to test its functionality. This could be called manual ...

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