[Tutor] Unit testing

[Kent Johnson]

Tino Dai wrote:
> And there is one caveat, I 
> will have to make a bunch of semaphores global instead of local to the 
> classes. While I know that there is no hard and fast rule about using 
> global variables, where can I find or can somebody tell me where I can 
> find some guidelines about them (or is this a use common sense rule)?

Main guideline - don't use globals. Fallback rule - don't use globals. Third rule - OK, if you really can't think of any other way, make it a global. :-)

Can you pass the semaphore to the class constructor (__init__() method)? What is it about the unit test that pushes you to make it global?

Kent