[rspec-devel] rspec_on_rails, speccing models, adding it helpers...

David Chelimsky dchelimsky at gmail.com
Tue Apr 1 18:09:48 EDT 2008

On Tue, Apr 1, 2008 at 5:29 PM, Zach Dennis <zach.dennis at gmail.com> wrote:
> I've got model helpers which perform reflection on associations to
>  ensure a relationship exists as expected. It doesn't test the
>  association (I think Rails does a pretty good job of ensuring the
>  association works). I'm looking for feedback on if folks (and the
>  rspec team =) would accept such a patch.

I'd rather see you publish this on its own. When we include things
like this in rspec proper, they become harder for us to change later.

>  Example:
>  describe SomeModel do
>   it_has_many :widgets, :destroy => :null, :class_name => "BaseWidget"
>   it_has_one :fuzzbucket
>   it_belongs_to :another_model
>  end

I see more and more structures appearing like this. I have very mixed
feelings about them. This is about structure, not behaviour. Even if
the underlying code is actually approaching this in a more behavioural
way, it's still expressing structure at the high level.

Also, if the widget's fuzzbucket moves to inside a
fuzzbucketcontainer, this all has to change. Whereas if the presence
of 0, 1 or many fuzzbuckets has some impact on behaviour, then
examples that express that impact will not have to change as the
internal widget structure changes.

Other thoughts?

>  it relies on the top level describe's description_type to determine
>  what model to reflect on. It removes a lot of boilerplate code for
>  spec'ing standard associations.
>  Thoughts?
>  --
>  Zach Dennis
>  http://www.continuousthinking.com
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