Unit Testing with PHPUnit
The term, quite simply, refers to the process of dividing software into the smallest testable components, called units, that can be tested independently to assert whether they fulfill their requirements and operate as intended.
There are many benefits that come with unit testing. One of the most important is that it allows you (and perhaps even your stakeholders) to determine the completeness of your software. By simply running your tests cases, you can easily confirm that the code works as expected.