[rspec-users] setting partial stub for just one value and letting obj handle the rest
dbatshaw at gmail.com
Thu Apr 1 18:12:01 EDT 2010
David, thanks for your response.
Matt, I totally hear you. In this contrived example, you probably
could but in the project I am working on it would be very difficult.
One of the challenges of joining a project already in progress...
On Apr 1, 1:45 pm, Matt Wynne <m... at mattwynne.net> wrote:
> On 1 Apr 2010, at 21:35, David Chelimsky wrote:
> > On Apr 1, 2010, at 3:14 PM, drewB wrote:
> >> Occasionally, I find myself in a situation where I want to have a
> >> mock
> >> obj returned if a method is called with a particular argument but
> >> handled normally otherwise. For example, lets say I have a Model
> >> named User and I am specing a controller that sends messages from one
> >> user to another. When User.find is called for the user who is making
> >> the request I want it to run normally but when User.find is called
> >> for
> >> the receiver I want it to return a mocked obj. In this case, I can
> >> do
> >> something like (http://gist.github.com/352305):
> >> user = mock_model(User)
> >> User.stub!(:find).at_least(1).and_return do |id|
> >> if id == mock_user.id.to_s
> >> user
> >> else
> >> User.find_by_id(id)
> >> end
> >> end
> >> If I didn't have another method that allowed me to find a User by
> >> it's
> >> id this won't work.
> >> Is there an easier way to accomplish this?
> > Not really. When you stub a method, the framework overrides that
> > method with its own implementation. There's no mechanism in place to
> > say "pass the message onto the real object if it doesn't have the
> > arguments I'm interested in." I'm not sure of any framework that
> > does that. Maybe RR, but I'm not sure.
> > Good luck.
> > David
> I can't help but chime in here that I would be pretty irritated to
> come across a test that mixed up using mocks and real objects,
> especially when they're the same class. Can you not use a mock for the
> other instance of User too?
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