[rspec-users] Testing two interdependent ActiveRecord models

David James dj at collectiveinsight.net
Thu Jun 21 15:17:19 EDT 2007

Dear geeky, pay-your-debt-up-front-instead-of-later testing guru  
(tell me I'm wrong!)...

I would appreciate if you (twould take a look at my message from a  
few weeks ago, since I didn't get any replies.  Any comments would  
appreciated -- even if they are "you are barking up the wrong tree"  
-- or "you should read article ____ so that you can rephrase /  
rethink your question"


On Jun 8, 2007, at 9:05 AM, David James wrote:

> Hello,
> In my app, I'd like to test two model object objects that interact
> with each other.  (In my example, a Person can have Contributions.)
> I guess you could say that I'm testing ActiveRecord associations.
> For example, a Person has zero or many Contributions.  A Contribution
> has one or more People.  This is the very basic version, but I think
> it will illustrate the dependency.  (In practice, I'm interested in
> testing these associations because there is some extra logic going on
> that needs testing.)
> Here are my observations / questions:
> 1. Since there are two models, it doesn't seem quite right to make a
> unit test for this, does it?
> 2. There is an interaction between the two models.  What is a good
> way to test the interaction?  Do I put some of the testing in
> person_spec.rb and some in contribution_spec.rb?  Or do I create some
> sort of "interaction" spec?
> 3. I don't think that an integration test makes sense, because I
> don't want to test the controller and views.
> 4. I wonder if mocks or stubs would make sense.  I don't think I need
> to stub out a particular method (i.e. credit card processing),
> though.  I'm pretty new to mocking, any advice or perspective would
> be helpful.
> I would appreciate any feedback -- testing philosophy, and maybe some
> hand waving, if you like. :)
> I would also be open to a refactoring / redesign if that will help
> with testing.
> Thanks,
> -David
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