Alice and Bob Learn Application Security by Tanya Janca

Author:Tanya Janca [Janca, Tanya]
Language: eng
Format: epub
ISBN: 9781119687405
Publisher: Wiley
Published: 2020-11-10T00:00:00+00:00

Unit Tests

Unit testing is a level of software testing where individual units/components of a software are tested. The purpose is to validate that each unit of the software performs as designed. A unit is the smallest testable part of any software. It usually has one or a few inputs and usually a single output.58

Unit tests are often written in your IDE and stored alongside your code in your repository; they are almost as valuable as your code. Ideally, developers run all unit tests before checking their code in, and if their code fails a test, the developer must either 1) fix their code or 2) adjust the test for the new code changes. They aren't allowed to check in broken code that doesn't pass the unit tests.

TIP Often when discussing unit tests people will talk about “code coverage.” This means what percentage of the code has a unit test that verifies it works correctly. There is no standard amount that every organization must have. That said, every organization aims for 100 percent, but it is rare to encounter very high code coverage in the wild. Try not to be too tough on your developers if they are nowhere near 100 percent; few are.

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