TDD: Specifying the Negative - a podcast by Scott Bain and Amir Kolsky

from 2015-09-25T15:35

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One of the issues that frequently comes up is "how do I write a test about a behavior that the system is specified not to have?" It's an interesting question given the nature of unit tests. Let's examine it.

The things that you cannot doSometimes part of the specification of a system is to disallow certain actions to be taken on it.

The simplest example of this is an immutable