rspec users - Oct 2007 - Does a mock model have to satisfy contraints

I am a little confused to the what happens with the following:

  before do
    @site = mock_model(Site, :to_param => "1")
    Site.stub!(:new).and_return(@site)
  end

  def post_with_successful_save
    @site.should_receive(:save).and_return(true)
    post :create, :site => {}
  end

I understand that the "@site.should_receive(:save)..." places a check
to
whether the method is called and that it should return "true", but
will
the actual method within the model be called, or does it also create a
stub to allow for the separation with the model.

The reason that I ask is that in the following line "post :create,
..."
there are no params passed into the post, yet is passes even though
there are many validates_presence_of constraints within the model.

The reason for the confusion is that in a previous project I had
failures on many of the auto-generated controller tests and the only way
to make them pass was to ensure all the controller post and put tests
used a model that satisfied all the constraints. On the current project
all the tests are passing when using mock models with no attributes set.

Thanks for the help
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On 10/16/07, Chris Olsen <lists at ruby-forum.com>
wrote:
> I am a little confused to the what happens with the following:
>
>   before do
>     @site = mock_model(Site, :to_param => "1")
>     Site.stub!(:new).and_return(@site)
>   end
>
>   def post_with_successful_save
>     @site.should_receive(:save).and_return(true)
>     post :create, :site => {}
>   end
>
> I understand that the "@site.should_receive(:save)..." places a
check to
> whether the method is called and that it should return "true"
This is a bit tricky. What you''re setting up here (which is true of
message expectations in general, not must mock_model) is an
expectation that @site will receive the message :save and that when it
does receive it, you are instructing it to return true (not expecting
that the real :save method returns true).

The real :save method is not called.

Make sense?

That is what I thought (and was hoping for)

Thanks David.

> This is a bit tricky. What you''re setting up here (which is true
of
> message expectations in general, not must mock_model) is an
> expectation that @site will receive the message :save and that when it
> does receive it, you are instructing it to return true (not expecting
> that the real :save method returns true).
> 
> The real :save method is not called.
> 
> Make sense?
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