Trouble using should_receive

Testing RSpec
1

I have this code trying to ensure my reset method works. I want to
make sure all the participants have their destroy method called.

in my spec for Room

 r = Room.new(:name => 'bob')
 r.save

 p = Participant.new(:login => 'a', :password =>

‘b’, :password_confirmation => ‘b’)
p.room = r
p.save!
p.should_receive(:destroy)

 r.reset

#in room.rb
def reset
participants.each { |p| p.destroy }
save!
end

Unfortunately it fails. I print out “p” in both locations and while
they have all the same data, they have different memory addresses. I
don’t know if this is the explanation for the issue but it’s all I can
find so far.

How do I fix this? Thanks!

Glenn

2

On Nov 15, 2007, at 2:03 PM, Pat M. wrote:

room.rb def

#participants don’t include the object you created. Rails does a
And then it ought to work.
hth

Pat

r.participants << p didn’t do it, but the “should change” did and I
like that solution best. Court3nay also suggested “r.stub!
(:participants).and_return([p])” which works also.

Thanks for your help, and thanks for the extra destroy_all trick too!

Glenn

3

On Nov 15, 2007 10:50 AM, Glenn F. [email protected] wrote:

have all the same data, they have different memory addresses. I don’t know
if this is the explanation for the issue but it’s all I can find so far.

How do I fix this? Thanks!

Glenn

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Hey Glenn,

The problem, as you mentioned, is that the objects loaded by
#participants don’t include the object you created. Rails does a
“SELECT * FROM participates WHERE room_id=?” and instantiates new
objects.

The first option is to use participants#<< instead of setting the
room. So instead of
p.room = r

you would have
r.partipants << p

And then it ought to work.

Alternatively, since you’re actually hitting the database, you can just
do

lambda { r.reset }.should change(Participant, :count).by(-1)

And as a side note, AR gives you #destroy_all, so instead of iterating
through the participants you can just do
participants.destroy_all

hth

Pat