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Date: Tue, 02 Oct 2007 19:10:16 +0200
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Subject: Re: [PHP-DEV]  Class Posing
From: sb@sebastian-bergmann.de (Sebastian Bergmann)

Stanislav Malyshev schrieb:
> This looks like factory pattern. What's wrong with implementing it as
> factory?

 Like I said before, the factory and singleton patterns are just example
 applications of this mechanism.

 What I want to use them for in PHPUnit is improving the Mock Objects
 system.

 Let us consider the following code:

   public function foo()
   {
       $bar    = new Bar;
       $returh = $bar->doSomething();

       // do something with $return

       return 'some value';
   }

 When I want to test the foo() method, I want to stub out the usage of
 the Bar class, for example, and have Bar::doSomething() return a
 pre-configured value instead of performing its normal operation.

 As I cannot pass a stubbed version of $bar into the method, I currently
 do not have a way to stub Bar.

 With class posing, however, I can override the "new Bar" and have it
 create an object of my stub implementation of Bar instead.

 I hope this makes my motivation for the feature more clear.

-- 
Sebastian Bergmann                          http://sebastian-bergmann.de/
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