A test is NOT a Unit Test when...

• It talks to a database


• It communicates across a network


• It touches the file system


• You have to do special things to your environment (such as editing config files) to run it

Tests that do these things are integration tests, not unit tests. [Shore & Warden 2007]

Unit Tests in PHP

Are you considering unit testing with your next PHP project?

Here's a xUnit family member:

http://www.phpunit.de/