rspec users - Apr 2008 - Stub an instance method for every new instance of a class

Is there an easy way to stub an instance method for every new instance of a
given class? I suppose I could just redefine the method, but I''m
wondering
if the RSpec mocking framework has this built in.
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On 01/04/2008, Jed Hurt <jed.hurt at gmail.com>
wrote:
>
> Is there an easy way to stub an instance method for every new instance of
> a given class? I suppose I could just redefine the method, but I''m
wondering
> if the RSpec mocking framework has this built in.

Hi Jed

I hate it when other people ask this, but I can''t help :)  How come you
need
to do this?  I''ve always wondered what the use case for this
"mocking"
strategy is

Ashley
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I think the general consensus is that if you need this feature, then  
you have ugly code that needs cleaning up :)  If you''re in a situation
like me, where you''re too noob to figure out a better solution for  
some legacy code that you inherited, go to this url and find the  
instructions for installing Mocha:

http://wiki.rubyonrails.org/rails/pages/Testing+Plugins

With it you can do:
ModelName.any_instance.stubs(:the_method).returns(happy_times)

However, I strongly encourage you to stare at your current code for a  
while and try to find a cleaner MVC-supportive solution.  The general  
rule of thumb is that if it''s difficult to write a spec for, then your
code is ugly :)  Hopefully in this case you can take this as an  
opportunity to improve your code.  If not, Mocha works fairly well!

Glenn

On Apr 1, 2008, at 3:50 AM, Ashley Moran wrote:
> On 01/04/2008, Jed Hurt <jed.hurt at gmail.com> wrote:
> Is there an easy way to stub an instance method for every new  
> instance of a given class? I suppose I could just redefine the  
> method, but I''m wondering if the RSpec mocking framework has this
> built in.
>
> Hi Jed
>
> I hate it when other people ask this, but I can''t help :)  How
come
> you need to do this?  I''ve always wondered what the use case for  
> this "mocking" strategy is
>
> Ashley
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
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Haha, that''s about the response I was expecting; I asked with some
trepidation. I''m just looking for a quick hack to short-circuit
Merb''s
render method to do some view/controller isolation testing until Merb
officially supports it. I can''t just stub methods on @controller (like
in
Rails) because the controller is instantiated after calling dispatch.
I suppose I could whip up a different sort of hack to accomplish the
isolation in the meantime, but now I''m not so sure; apparently
I''m quite a
noob ;)

On Tue, Apr 1, 2008 at 1:50 AM, Ashley Moran <ashley.moran at
patchspace.co.uk>
wrote:
> On 01/04/2008, Jed Hurt <jed.hurt at gmail.com> wrote:
>
> > Is there an easy way to stub an instance method for every new instance
> > of a given class? I suppose I could just redefine the method, but
I''m
> > wondering if the RSpec mocking framework has this built in.
>
>
> Hi Jed
>
> I hate it when other people ask this, but I can''t help :)  How
come you
> need to do this?  I''ve always wondered what the use case for this
"mocking"
> strategy is
>
> Ashley
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
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Could you stub out Controller.new and return your mock?

On Tue, Apr 1, 2008 at 1:19 PM, Jed Hurt <jed.hurt at gmail.com> wrote:
> Haha, that''s about the response I was expecting; I asked with some
> trepidation. I''m just looking for a quick hack to short-circuit
Merb''s
> render method to do some view/controller isolation testing until Merb
> officially supports it. I can''t just stub methods on @controller
(like in
> Rails) because the controller is instantiated after calling dispatch.
> I suppose I could whip up a different sort of hack to accomplish the
> isolation in the meantime, but now I''m not so sure; apparently
I''m quite a
> noob ;)
>
> On Tue, Apr 1, 2008 at 1:50 AM, Ashley Moran <
> ashley.moran at patchspace.co.uk> wrote:
>
> > On 01/04/2008, Jed Hurt <jed.hurt at gmail.com> wrote:
> >
> > > Is there an easy way to stub an instance method for every new
instance
> > > of a given class? I suppose I could just redefine the method, but
I''m
> > > wondering if the RSpec mocking framework has this built in.
> >
> >
> > Hi Jed
> >
> > I hate it when other people ask this, but I can''t help :) 
How come you
> > need to do this?  I''ve always wondered what the use case for
this "mocking"
> > strategy is
> >
> > Ashley
> >
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>


-- 
http://www.coreyhaines.com
The Internet''s Premiere source of information about Corey Haines
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On Tue, Apr 1, 2008 at 2:11 PM, Corey Haines <coreyhaines at gmail.com>
wrote:
> Could you stub out Controller.new and return your mock?
Bingo.
>
>
>
> On Tue, Apr 1, 2008 at 1:19 PM, Jed Hurt <jed.hurt at gmail.com>
wrote:
> > Haha, that''s about the response I was expecting; I asked with
some
> trepidation. I''m just looking for a quick hack to short-circuit
Merb''s
> render method to do some view/controller isolation testing until Merb
> officially supports it. I can''t just stub methods on @controller
(like in
> Rails) because the controller is instantiated after calling dispatch.
> >
> >
> > I suppose I could whip up a different sort of hack to accomplish the
> isolation in the meantime, but now I''m not so sure; apparently
I''m quite a
> noob ;)
> >
> >
> >
> >
> >
> > On Tue, Apr 1, 2008 at 1:50 AM, Ashley Moran
> <ashley.moran at patchspace.co.uk> wrote:
> >
> > >
> > >
> > >
> > >
> > > On 01/04/2008, Jed Hurt <jed.hurt at gmail.com> wrote:
> > >
> > >
> > > > Is there an easy way to stub an instance method for every
new instance
> of a given class? I suppose I could just redefine the method, but
I''m
> wondering if the RSpec mocking framework has this built in.
> > >
> > >
> > > Hi Jed
> > >
> > > I hate it when other people ask this, but I can''t help
:)  How come you
> need to do this?  I''ve always wondered what the use case for this
"mocking"
> strategy is
> > >
> > > Ashley
> > >
> > >
> > > _______________________________________________
> > > rspec-users mailing list
> > > rspec-users at rubyforge.org
> > > http://rubyforge.org/mailman/listinfo/rspec-users
> > >
> >
> >
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
>
>
>
> --
> http://www.coreyhaines.com
>  The Internet''s Premiere source of information about Corey Haines
> _______________________________________________
>  rspec-users mailing list
>  rspec-users at rubyforge.org
>  http://rubyforge.org/mailman/listinfo/rspec-users
>

I''m not sure how that would work. For controller specs, I want to keep
most
of the controller intact so that I can verify its actual behavior. Am I
missing something?

On Tue, Apr 1, 2008 at 12:12 PM, David Chelimsky <dchelimsky at gmail.com>
wrote:
> On Tue, Apr 1, 2008 at 2:11 PM, Corey Haines <coreyhaines at
gmail.com>
> wrote:
> > Could you stub out Controller.new and return your mock?
>
> Bingo.
>
> >
> >
> >
> > On Tue, Apr 1, 2008 at 1:19 PM, Jed Hurt <jed.hurt at gmail.com>
wrote:
> > > Haha, that''s about the response I was expecting; I asked
with some
> > trepidation. I''m just looking for a quick hack to
short-circuit Merb''s
> > render method to do some view/controller isolation testing until Merb
> > officially supports it. I can''t just stub methods on
@controller (like
> in
> > Rails) because the controller is instantiated after calling dispatch.
> > >
> > >
> > > I suppose I could whip up a different sort of hack to accomplish
the
> > isolation in the meantime, but now I''m not so sure;
apparently I''m quite
> a
> > noob ;)
> > >
> > >
> > >
> > >
> > >
> > > On Tue, Apr 1, 2008 at 1:50 AM, Ashley Moran
> > <ashley.moran at patchspace.co.uk> wrote:
> > >
> > > >
> > > >
> > > >
> > > >
> > > > On 01/04/2008, Jed Hurt <jed.hurt at gmail.com> wrote:
> > > >
> > > >
> > > > > Is there an easy way to stub an instance method for
every new
> instance
> > of a given class? I suppose I could just redefine the method, but
I''m
> > wondering if the RSpec mocking framework has this built in.
> > > >
> > > >
> > > > Hi Jed
> > > >
> > > > I hate it when other people ask this, but I can''t
help :)  How come
> you
> > need to do this?  I''ve always wondered what the use case for
this
> "mocking"
> > strategy is
> > > >
> > > > Ashley
> > > >
> > > >
> > > > _______________________________________________
> > > > rspec-users mailing list
> > > > rspec-users at rubyforge.org
> > > > http://rubyforge.org/mailman/listinfo/rspec-users
> > > >
> > >
> > >
> > > _______________________________________________
> > > rspec-users mailing list
> > > rspec-users at rubyforge.org
> > > http://rubyforge.org/mailman/listinfo/rspec-users
> > >
> >
> >
> >
> > --
> > http://www.coreyhaines.com
> >  The Internet''s Premiere source of information about Corey
Haines
> > _______________________________________________
> >  rspec-users mailing list
> >  rspec-users at rubyforge.org
> >  http://rubyforge.org/mailman/listinfo/rspec-users
> >
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
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Create an instance of the controller

contr = MyController.new

MyController.stub!(:new).and_return contr

contr.stub!(:method_i_want_to_stub).and_return ''sweetness''

Something like this?

-Corey

On Wed, Apr 2, 2008 at 12:22 AM, Jed Hurt <jed.hurt at gmail.com> wrote:
> I''m not sure how that would work. For controller specs, I want to
keep
> most of the controller intact so that I can verify its actual behavior. Am
I
> missing something?
>
>
> On Tue, Apr 1, 2008 at 12:12 PM, David Chelimsky <dchelimsky at
gmail.com>
> wrote:
>
> > On Tue, Apr 1, 2008 at 2:11 PM, Corey Haines <coreyhaines at
gmail.com>
> > wrote:
> > > Could you stub out Controller.new and return your mock?
> >
> > Bingo.
> >
> > >
> > >
> > >
> > > On Tue, Apr 1, 2008 at 1:19 PM, Jed Hurt <jed.hurt at
gmail.com> wrote:
> > > > Haha, that''s about the response I was expecting; I
asked with some
> > > trepidation. I''m just looking for a quick hack to
short-circuit Merb''s
> > > render method to do some view/controller isolation testing until
Merb
> > > officially supports it. I can''t just stub methods on
@controller (like
> > in
> > > Rails) because the controller is instantiated after calling
dispatch.
> > > >
> > > >
> > > > I suppose I could whip up a different sort of hack to
accomplish the
> > > isolation in the meantime, but now I''m not so sure;
apparently I''m
> > quite a
> > > noob ;)
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > On Tue, Apr 1, 2008 at 1:50 AM, Ashley Moran
> > > <ashley.moran at patchspace.co.uk> wrote:
> > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > On 01/04/2008, Jed Hurt <jed.hurt at gmail.com>
wrote:
> > > > >
> > > > >
> > > > > > Is there an easy way to stub an instance method
for every new
> > instance
> > > of a given class? I suppose I could just redefine the method, but
I''m
> > > wondering if the RSpec mocking framework has this built in.
> > > > >
> > > > >
> > > > > Hi Jed
> > > > >
> > > > > I hate it when other people ask this, but I
can''t help :)  How
> > come you
> > > need to do this?  I''ve always wondered what the use case
for this
> > "mocking"
> > > strategy is
> > > > >
> > > > > Ashley
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > rspec-users mailing list
> > > > > rspec-users at rubyforge.org
> > > > > http://rubyforge.org/mailman/listinfo/rspec-users
> > > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > rspec-users mailing list
> > > > rspec-users at rubyforge.org
> > > > http://rubyforge.org/mailman/listinfo/rspec-users
> > > >
> > >
> > >
> > >
> > > --
> > > http://www.coreyhaines.com
> > >  The Internet''s Premiere source of information about
Corey Haines
> > > _______________________________________________
> > >  rspec-users mailing list
> > >  rspec-users at rubyforge.org
> > >  http://rubyforge.org/mailman/listinfo/rspec-users
> > >
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>


-- 
http://www.coreyhaines.com
The Internet''s Premiere source of information about Corey Haines
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Ahhh, clever. I see the light

On Wed, Apr 2, 2008 at 8:19 AM, Corey Haines <coreyhaines at gmail.com>
wrote:
> Create an instance of the controller
>
> contr = MyController.new
>
> MyController.stub!(:new).and_return contr
>
> contr.stub!(:method_i_want_to_stub).and_return
''sweetness''
>
> Something like this?
>
> -Corey
>
> On Wed, Apr 2, 2008 at 12:22 AM, Jed Hurt <jed.hurt at gmail.com>
wrote:
>
> > I''m not sure how that would work. For controller specs, I
want to keep
> > most of the controller intact so that I can verify its actual
behavior. Am I
> > missing something?
> >
> >
> > On Tue, Apr 1, 2008 at 12:12 PM, David Chelimsky <dchelimsky at
gmail.com>
> > wrote:
> >
> > > On Tue, Apr 1, 2008 at 2:11 PM, Corey Haines <coreyhaines at
gmail.com>
> > > wrote:
> > > > Could you stub out Controller.new and return your mock?
> > >
> > > Bingo.
> > >
> > > >
> > > >
> > > >
> > > > On Tue, Apr 1, 2008 at 1:19 PM, Jed Hurt <jed.hurt at
gmail.com> wrote:
> > > > > Haha, that''s about the response I was
expecting; I asked with some
> > > > trepidation. I''m just looking for a quick hack to
short-circuit
> > > Merb''s
> > > > render method to do some view/controller isolation testing
until
> > > Merb
> > > > officially supports it. I can''t just stub methods
on @controller
> > > (like in
> > > > Rails) because the controller is instantiated after calling
> > > dispatch.
> > > > >
> > > > >
> > > > > I suppose I could whip up a different sort of hack to
accomplish
> > > the
> > > > isolation in the meantime, but now I''m not so sure;
apparently I''m
> > > quite a
> > > > noob ;)
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > On Tue, Apr 1, 2008 at 1:50 AM, Ashley Moran
> > > > <ashley.moran at patchspace.co.uk> wrote:
> > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > On 01/04/2008, Jed Hurt <jed.hurt at
gmail.com> wrote:
> > > > > >
> > > > > >
> > > > > > > Is there an easy way to stub an instance
method for every new
> > > instance
> > > > of a given class? I suppose I could just redefine the
method, but
> > > I''m
> > > > wondering if the RSpec mocking framework has this built in.
> > > > > >
> > > > > >
> > > > > > Hi Jed
> > > > > >
> > > > > > I hate it when other people ask this, but I
can''t help :)  How
> > > come you
> > > > need to do this?  I''ve always wondered what the use
case for this
> > > "mocking"
> > > > strategy is
> > > > > >
> > > > > > Ashley
> > > > > >
> > > > > >
> > > > > > _______________________________________________
> > > > > > rspec-users mailing list
> > > > > > rspec-users at rubyforge.org
> > > > > > http://rubyforge.org/mailman/listinfo/rspec-users
> > > > > >
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > rspec-users mailing list
> > > > > rspec-users at rubyforge.org
> > > > > http://rubyforge.org/mailman/listinfo/rspec-users
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > http://www.coreyhaines.com
> > > >  The Internet''s Premiere source of information
about Corey Haines
> > > > _______________________________________________
> > > >  rspec-users mailing list
> > > >  rspec-users at rubyforge.org
> > > >  http://rubyforge.org/mailman/listinfo/rspec-users
> > > >
> > > _______________________________________________
> > > rspec-users mailing list
> > > rspec-users at rubyforge.org
> > > http://rubyforge.org/mailman/listinfo/rspec-users
> > >
> >
> >
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
>
>
>
> --
> http://www.coreyhaines.com
> The Internet''s Premiere source of information about Corey Haines
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
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