Count error on lambda should change

Testing RSpec
1

Hi, any idea what could cause the following error in a controller
test?

"count should have been changed by 1, but was changed by 0"

I’m posting to a create route using a lambda, similar to Hartl’s
example in his Rails tutorial:

it “should create a user” do
lambda do
post :create, :user => @attr
end.should change(User, :count).by(1)
end

The only difference is I’m using a factory instead of an attribute
hash. I know the action works because I can perform it manually and my
model specs pass.

More importantly, I can see the inserts (two rows, parent and child)
in my Postgres logs. And I see a rollback before the count is
selected. Could that be the cause? [I searched for a while and didn’t see much discussion about this, so probably not.]

2

Sounds like a validation failure. My guess is that you’re re-using the
factory-created record’s attributes, and your example fails because of a
uniqueness validation. This would explain the rollback if you’re using
the create! or save! method.

Pat