Ironruby core - Aug 2010 - "can't convert Subclass_..." when isolating an interface

Hello all,
I''ve been trying to use caricature to stub my services in my
controllers
tests, now when I try to test this code:
public TestController(ITestService service)
{
    _service = service;
}

when my interface is:
public interface ITestService
{
    string GetContent();
}

like so:
s = isolate ITestService
s.when_receiving(:get_content).return(''some content'')
c = TestController.new s

I get the above mentioned error (see attachment)

Any ideas what I''m doing wrong?

Attachments:
http://www.ruby-forum.com/attachment/4902/error.jpg

-- 
Posted via http://www.ruby-forum.com/.

Hi Nieve,

I don''t see anything that looks wrong.  Which version of IronRuby are
you
using?

Let me know and I''ll see if I can reproduce the problem.  If I can,
I''ll
take a stab at debugging it.


Regards,

-Charles

On Wed, Aug 4, 2010 at 4:17 AM, Nieve Gr <lists at ruby-forum.com> wrote:
> Hello all,
> I''ve been trying to use caricature to stub my services in my
controllers
> tests, now when I try to test this code:
> public TestController(ITestService service)
> {
>    _service = service;
> }
>
> when my interface is:
> public interface ITestService
> {
>    string GetContent();
> }
>
> like so:
> s = isolate ITestService
> s.when_receiving(:get_content).return(''some content'')
> c = TestController.new s
>
> I get the above mentioned error (see attachment)
>
> Any ideas what I''m doing wrong?
>
> Attachments:
> http://www.ruby-forum.com/attachment/4902/error.jpg
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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Hi Charles,
First of all, thanks for the reply.

I''m currently on IronRuby 1.1

Now, I just doubled checked this, and this happens whether I call 
isolate the interface or the implementation. Also, I presume that''s 
something with my code since Ben Hall''s Kona example (that uses the
same
code) works on my machine...

I can create a quick project and put it on github so it''ll be easier to
reproduce.

cheers,
~n

Charles Strahan wrote:
> Hi Nieve,
> 
> I don''t see anything that looks wrong.  Which version of IronRuby
are
> you
> using?
> 
> Let me know and I''ll see if I can reproduce the problem.  If I
can, I''ll
> take a stab at debugging it.
> 
> 
> Regards,
> 
> -Charles
-- 
Posted via http://www.ruby-forum.com/.

Hi Nieve,

Sure thing.  Let me know when you put the sample project up on github and
I''ll take a look at it.

-Charles

On Wed, Aug 4, 2010 at 3:10 PM, Nieve G. <lists at ruby-forum.com> wrote:
> Hi Charles,
> First of all, thanks for the reply.
>
> I''m currently on IronRuby 1.1
>
> Now, I just doubled checked this, and this happens whether I call
> isolate the interface or the implementation. Also, I presume
that''s
> something with my code since Ben Hall''s Kona example (that uses
the same
> code) works on my machine...
>
> I can create a quick project and put it on github so it''ll be
easier to
> reproduce.
>
> cheers,
> ~n
>
> Charles Strahan wrote:
> > Hi Nieve,
> >
> > I don''t see anything that looks wrong.  Which version of
IronRuby are
> > you
> > using?
> >
> > Let me know and I''ll see if I can reproduce the problem.  If
I can, I''ll
> > take a stab at debugging it.
> >
> >
> > Regards,
> >
> > -Charles
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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Charles,
you can take a look at it here:
http://github.com/nieve/IsolationTest

I just hope it''s not something completely obvious...
-- 
Posted via http://www.ruby-forum.com/.

Nieve,

Oh... my... goodness... I''ve never seen ANYONE make that mistake
before!




Just kidding  ;P
I''ll take a look at it a little later, unless someone else beats me to
it.
;)

Cheers,
-Charles


On Wed, Aug 4, 2010 at 3:56 PM, Nieve G. <lists at ruby-forum.com> wrote:
> Charles,
> you can take a look at it here:
> http://github.com/nieve/IsolationTest
>
> I just hope it''s not something completely obvious...
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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try doing

ITestService.isolate

or

isolation_for ITestService
---
Met vriendelijke groeten - Best regards - Salutations
Ivan Porto Carrero
Author of IronRuby in Action (http://manning.com/carrero)
Microsoft IronRuby/C# MVP


On Wed, Aug 4, 2010 at 10:56 PM, Nieve G. <lists at ruby-forum.com> wrote:
> Charles,
> you can take a look at it here:
> http://github.com/nieve/IsolationTest
>
> I just hope it''s not something completely obvious...
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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I just looked at your sample project

It''s best to require spec before caricature because caricature hooks
into
spec
The IHomeRepository interface is empty. Try adding a method to that and see
if it still occurs.


you can also add require ''caricature/aspnet_mvc''


I don''t have a windows machine running atm but I''ll check
tomorrow if this
didn''t help you
---
Met vriendelijke groeten - Best regards - Salutations
Ivan Porto Carrero
Author of IronRuby in Action (http://manning.com/carrero)
Microsoft IronRuby/C# MVP


On Wed, Aug 4, 2010 at 10:56 PM, Nieve G. <lists at ruby-forum.com> wrote:
> Charles,
> you can take a look at it here:
> http://github.com/nieve/IsolationTest
>
> I just hope it''s not something completely obvious...
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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try doing

ITestService.isolate

or

isolation_for ITestService
---
Met vriendelijke groeten - Best regards - Salutations
Ivan Porto Carrero
Author of IronRuby in Action (http://manning.com/carrero)
Microsoft IronRuby/C# MVP



On Wed, Aug 4, 2010 at 10:56 PM, Nieve G. <lists at ruby-forum.com> wrote:
> Charles,
> you can take a look at it here:
> http://github.com/nieve/IsolationTest
>
> I just hope it''s not something completely obvious...
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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I just looked at your sample project

It''s best to require spec before caricature because caricature hooks
into
spec
The IHomeRepository interface is empty. Try adding a method to that and see
if it still occurs.


you can also add require ''caricature/aspnet_mvc''


I don''t have a windows machine running atm but I''ll check
tomorrow if this
didn''t help you
---
Met vriendelijke groeten - Best regards - Salutations
Ivan Porto Carrero
Author of IronRuby in Action (http://manning.com/carrero)
Microsoft IronRuby/C# MVP


On Wed, Aug 4, 2010 at 10:56 PM, Nieve G. <lists at ruby-forum.com> wrote:
> Charles,
> you can take a look at it here:
> http://github.com/nieve/IsolationTest
>
> I just hope it''s not something completely obvious...
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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It looks like the generated isolation isn''t implementing
IHomeRepository:

irb(main):032:0> repo = isolate FakeMvcProject::Controllers::IHomeRepository
=> #<Object805c8b559a854b9ca0269e9b1d7f7643:0x0000482>
irb(main):033:0> repo.GetType.get_interfaces
=> [System.ComponentModel.ICustomTypeDescriptor,
IronRuby.Runtime.Calls.IRubyDynamicMetaObjectProvider,
System.Dynamic.IDynamicMetaObjectProvider,
IronRuby.Runtime.IRubyObject,
IronRuby.Runtime.IRubyObjectState,
IronRuby.Runtime.IDuplicable,
System.Runtime.Serialization.ISerializable]


I also tried this (notice that IHomeRepository *is* listed):

irb(main):034:0> class Foo
irb(main):035:1>   include IHomeRepository
irb(main):036:1> end
=> Foo
irb(main):037:0> Foo.new.GetType.get_interfaces
=> [IronRuby.Runtime.IRubyObject,
IronRuby.Runtime.IRubyObjectState,
System.Runtime.Serialization.ISerializable,
IronRuby.Runtime.Calls.IRubyDynamicMetaObjectProvider,
System.Dynamic.IDynamicMetaObjectProvider,
System.ComponentModel.ICustomTypeDescriptor,
IronRuby.Compiler.Generation.IRubyType,
FakeMvcProject.Controllers.IHomeRepository]


It looks like this might be a problem with Caricature (perhaps only when
running IR 1.1?).


-Charles


On Wed, Aug 4, 2010 at 4:40 PM, Ivan Porto Carrero <ivan at
flanders.co.nz>wrote:
>
>
> try doing
>
> ITestService.isolate
>
> or
>
> isolation_for ITestService
> ---
> Met vriendelijke groeten - Best regards - Salutations
> Ivan Porto Carrero
> Author of IronRuby in Action (http://manning.com/carrero)
> Microsoft IronRuby/C# MVP
>
>
>
> On Wed, Aug 4, 2010 at 10:56 PM, Nieve G. <lists at ruby-forum.com>
wrote:
>
>> Charles,
>> you can take a look at it here:
>> http://github.com/nieve/IsolationTest
>>
>> I just hope it''s not something completely obvious...
>> --
>> Posted via http://www.ruby-forum.com/.
>> _______________________________________________
>> Ironruby-core mailing list
>> Ironruby-core at rubyforge.org
>> http://rubyforge.org/mailman/listinfo/ironruby-core
>>
>
>
>
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
>
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Aha! I''ve figured it out.

Here''s the `isolate'' method (from
lib/caricature/core_ext/object.rb):

 def isolate(name=nil, recorder = Caricature::MethodCallRecorder.new,
expectations = Caricature::Expectations.new, &block)
    iso = Caricature::Isolation.for(self, recorder, expectations)
    return iso unless name
    if block
      if block.arity > 0
        @expectation = iso.when_receiving(name, &block)
      else
        @expectation = iso.when_receiving(name)
        instance_eval &block
      end
    end
    iso
  end


The important line to note is the following:
    iso = Caricature::Isolation.for(self, recorder, expectations)

This `isolate'' method let''s you do stuff like
`IHomeRepository.isolate''.

The TypeError you are experiencing is due to the fact that you are isolating
whatever the implicit `self'' happens to be at the time you call
`isolate''.
If you instead use `IHomeRepository.isolate'', or
`Caricature::Isolation.for
IHomeRepository'', it should work just fine.

Perhaps Caricature could be tweaked a little so that making this mistake is
more obvious (I was stumped too ;P).

Cheers,
-Charles


On Wed, Aug 4, 2010 at 9:47 PM, Charles Strahan <charles.c.strahan at
gmail.com
> wrote:
> It looks like the generated isolation isn''t implementing
IHomeRepository:
>
> irb(main):032:0> repo = isolate
> FakeMvcProject::Controllers::IHomeRepository
> => #<Object805c8b559a854b9ca0269e9b1d7f7643:0x0000482>
> irb(main):033:0> repo.GetType.get_interfaces
> => [System.ComponentModel.ICustomTypeDescriptor,
> IronRuby.Runtime.Calls.IRubyDynamicMetaObjectProvider,
> System.Dynamic.IDynamicMetaObjectProvider,
> IronRuby.Runtime.IRubyObject,
> IronRuby.Runtime.IRubyObjectState,
> IronRuby.Runtime.IDuplicable,
> System.Runtime.Serialization.ISerializable]
>
>
> I also tried this (notice that IHomeRepository *is* listed):
>
> irb(main):034:0> class Foo
> irb(main):035:1>   include IHomeRepository
> irb(main):036:1> end
> => Foo
> irb(main):037:0> Foo.new.GetType.get_interfaces
> => [IronRuby.Runtime.IRubyObject,
> IronRuby.Runtime.IRubyObjectState,
> System.Runtime.Serialization.ISerializable,
> IronRuby.Runtime.Calls.IRubyDynamicMetaObjectProvider,
> System.Dynamic.IDynamicMetaObjectProvider,
> System.ComponentModel.ICustomTypeDescriptor,
> IronRuby.Compiler.Generation.IRubyType,
> FakeMvcProject.Controllers.IHomeRepository]
>
>
> It looks like this might be a problem with Caricature (perhaps only when
> running IR 1.1?).
>
>
> -Charles
>
>
>
> On Wed, Aug 4, 2010 at 4:40 PM, Ivan Porto Carrero <ivan at
flanders.co.nz>wrote:
>
>>
>>
>> try doing
>>
>> ITestService.isolate
>>
>> or
>>
>> isolation_for ITestService
>> ---
>> Met vriendelijke groeten - Best regards - Salutations
>> Ivan Porto Carrero
>> Author of IronRuby in Action (http://manning.com/carrero)
>> Microsoft IronRuby/C# MVP
>>
>>
>>
>> On Wed, Aug 4, 2010 at 10:56 PM, Nieve G. <lists at
ruby-forum.com> wrote:
>>
>>> Charles,
>>> you can take a look at it here:
>>> http://github.com/nieve/IsolationTest
>>>
>>> I just hope it''s not something completely obvious...
>>> --
>>> Posted via http://www.ruby-forum.com/.
>>> _______________________________________________
>>> Ironruby-core mailing list
>>> Ironruby-core at rubyforge.org
>>> http://rubyforge.org/mailman/listinfo/ironruby-core
>>>
>>
>>
>>
>> _______________________________________________
>> Ironruby-core mailing list
>> Ironruby-core at rubyforge.org
>> http://rubyforge.org/mailman/listinfo/ironruby-core
>>
>>
>
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@Ivan- Many many thanks!! that worked :)

I did also try to put require spec before caricature, but that didn''t 
help. I left it though like that, since it makes sense.

The one thing I still don''t get is how come in Ben''s Kona
example the
isolate Service works and on the same machine, my code doesn''t... am 
wondering what could possibly differ, would be interesting to know.

~n
-- 
Posted via http://www.ruby-forum.com/.