If you have a PHP application that makes heavy use of objects (which is probably 95% of you reading this) then you will have objects with constructor methods in them. It is also very likely that there is some stuff going on in those constructors. So how do you test things like this?

He includes a sample constructor that creates a container, pulls out some configuration values and reassigns them to class properties. He first tests that these properties have been set correctly by mocking out the object and overriding the configuration settings in the (dependency injection) container.

I've update my beginners tutorial on object oriented PHP adding steps 12-17. I cover two new basic OO concepts in these steps: Constructors and Access modifiers.

The fully updated tutorial can be found here on Stefan's website.