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That's certainly one thing that tests should do. But there are many more also (e.g. do you get appropriate error reporting when pre-condition is not met on a function, does the application as a whole exhibit appropriate behaviour, etc.)

You might also want to look at Design By Contract as an alternative way of using pre-conditions, post-conditions and invariants in software development.


In reply to Re^2: What goes in a test suite? by adrianh
in thread What goes in a test suite? by Marza

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