rspec users - Aug 2007 - stubs which yield and return

Is there any reason why a stub couldn''t both yield and return? 
I''m
looking for a way to mock out a class I''ve made named
"AnonymousClass":

class AnonymousClass

   def initialize(&blk)
     @klass = Class.new
     @klass.instance_eval(&blk) if block_given?
   end

   def new
     @klass.new
   end

   def evaluate(&blk)
     @klass.instance_eval(&blk)
   end

   attr_reader :klass
   alias_method :class, :klass
end

One of the behaviours of the AnonymousClass is that new can take a  
block, and eval the block in the anonymous class, represented by the  
@klass instance_variable:

ac = AnonymousClass.new do
   include Enumerable
end

So is there a way to stub AnonymousClass.new such that it yield an  
AnonymousClass mock, as well as yielding to the block given?  What  
are the technical challenges involved in implementing this in the  
mocking framework?  Or is it a matter of clean syntax?

Regards,

Scott

On 8/7/07, Scott Taylor <mailing_lists at railsnewbie.com>
wrote:
>
> Is there any reason why a stub couldn''t both yield and return?
Yes. Nobody ever asked for it :)
> I''m
> looking for a way to mock out a class I''ve made named
"AnonymousClass":
>
> class AnonymousClass
>
>    def initialize(&blk)
>      @klass = Class.new
>      @klass.instance_eval(&blk) if block_given?
>    end
>
>    def new
>      @klass.new
>    end
>
>    def evaluate(&blk)
>      @klass.instance_eval(&blk)
>    end
>
>    attr_reader :klass
>    alias_method :class, :klass
> end
>
> One of the behaviours of the AnonymousClass is that new can take a
> block, and eval the block in the anonymous class, represented by the
> @klass instance_variable:
>
> ac = AnonymousClass.new do
>    include Enumerable
> end
>
> So is there a way to stub AnonymousClass.new such that it yield an
> AnonymousClass mock, as well as yielding to the block given?  What
> are the technical challenges involved in implementing this in the
> mocking framework?  Or is it a matter of clean syntax?
Again - this simply hasn''t come up. Please add an RFE and feel free to
submit a patch.

Cheers,
David
>
> Regards,
>
> Scott
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>

On Aug 7, 2007, at 12:54 PM, David Chelimsky wrote:
> On 8/7/07, Scott Taylor <mailing_lists at railsnewbie.com> wrote:
>>
>> Is there any reason why a stub couldn''t both yield and return?
>
> Yes. Nobody ever asked for it :)
>
> Again - this simply hasn''t come up. Please add an RFE and feel
free to
> submit a patch.
>
Will do.  I think for now I''m going to override the stub in the  
individual
spec to yield.

More importantly, I''m going to get autotest to work w/ rspec''s
native
development before I do anymore rspec work.  The time to run the
full test suite is absolutely unbearable on my Mac G4.

Scott