rspec users - Mar 2007 - Opening the singleton class of mocked objects

I wrote a plugin [1] a while ago that lets me do validations on a
single AR instance.  Instead of defining validations in an AR class, I
can define them on a AR instance''s singleton class:

class << @video
  validates_presence_of :title
end

One of my specs mocks Video.find, and the above code is run on the
mock object.  When I run the spec, I get the expected

undefined method `validates_presence_of'' for
#<Class:#<Spec::Mocks::Mock:0x33772e4>>

The code works though, I get the expected behavior.  I just don''t know
how to spec it.  Thoughts?

Pat

[1] http://evang.eli.st/blog/2007/1/20/instance-validations-plugin

On 3/13/07, Pat Maddox <pergesu at gmail.com>
wrote:
> I wrote a plugin [1] a while ago that lets me do validations on a
> single AR instance.  Instead of defining validations in an AR class, I
> can define them on a AR instance''s singleton class:
>
> class << @video
>   validates_presence_of :title
> end
>
> One of my specs mocks Video.find, and the above code is run on the
> mock object.  When I run the spec, I get the expected
>
> undefined method `validates_presence_of'' for
> #<Class:#<Spec::Mocks::Mock:0x33772e4>>
>
> The code works though, I get the expected behavior.  I just don''t
know
> how to spec it.  Thoughts?
>
> Pat
>
> [1] http://evang.eli.st/blog/2007/1/20/instance-validations-plugin
>
btw the obvious way to do this would be to make my mock object a null
object, then just stub the valid? method (which is what I ultimately
call in that action).  I know that my instance validations work fine
from other tests, so I can get away with that.  However it''s blowing
up because the singleton class can''t just accept any method.

Pat