From: Guillaume Marcais <guslist@...>
Date: 2004-05-08T22:40:00+09:00
Subject: Re: test unit & singleton

Thanks to all of you for good suggestions.

Guillaume.


Le 8 mai 04, � 05:03, Kent Dahl a �crit :

> Gennady wrote:
>> That's why you want to avoid singletons as much as possible when it 
>> comes to unit testing.
>> In cases I do need singletons, I usually end up with a regular class 
>> that can be unit tested, and a separate singleton class that simply 
>> delegates all calls to my actual class. Or something similar.
>
> Suggestion for something similar, w/o the delegation overhead:
>
> Move all functionality of the singleton class into a module. Include 
> that module in two classes, one which also includes Singleton (for 
> actual use) and one dummy class for testing. Put the code for the 
> dummy class in the unit tests themselves, so the application code 
> doesn't accidentally use it for anything.
>
> require 'singleton'
> module RealStuff
>   # ...
> end
> class DummyClass
>   include RealStuff
> end
> class RealClass
>   include RealStuff
>   include Singleton
> end
>
> -- 
> (\[ Kent Dahl ]/)_    _~_    _____[ http://www.pvv.org/~kentda/ 
> ]_____/~
>  ))\_student_/((  \__d L b__/     Master of Science in Technology     )
> ( \__\_�|�_/__/ ) _)  Industrial economics and technology management (
>  \____/_�_\____/ (____engineering.discipline_=_Computer::Technology___)
>
>