Java Projects - Second Edition

Good unit tests

Is this a good unit test? If you read it in a tutorial book like this, it has to be. Actually, it is not. It is a good code to demonstrate some of the tools that JUnit provides and some Java language features, but I would not use it in a professional project.

What makes a unit test good? To answer this question, we have to define what unit tests are used for. Unit tests serve two purposes. The purpose of the unit test is to validate the proper functioning of the unit and to document it.

Unit tests are not used to find bugs. Developers eventually use unit tests during debugging sessions but, many times, the testing code created for the debugging is a temporary one. When the bug is fixed, the code used to find it will not get ...