Unit testing
Method by which individual units of source code, sets of one or more computer program modules together with associated control data, usage procedures, and operating procedures, are tested to determine whether they are fit for use.[
- Snippet from Wikipedia: Unit testing
In computer programming, unit testing, a.k.a. component or module testing, is a form of software testing by which isolated source code is tested to validate expected behavior.
It is a common step in development processes such as Agile.