Hi Elisha,
I'm using the activity inside a flowchart. It is populated with variables of this flowchart and therefore not wrapped in a class.
Inside the flowchart I have defined a variable of type System.Decimal and bind it to the output argument of the activity. This activity calls an external system wich is not available during the tests.
So what I want, is to the mock this activity so it returns always € 20.00.