rspec users - Aug 2009 - Assigning instance variable :expected and :got appear to be the same

I have a very fairly simple spec

it "should assign an instance variable" do
   get ''new''
   assigns[:city].should == City.new
end

In my controller

def new
  @city = City.new
end

but when I run it, I get

''CitiesController GET ''new'' should assign an instance
variable'' FAILED
expected: #<City id: nil, name: nil, created_at: nil, updated_at:
nil>,
         got: #<City id: nil, name: nil, created_at: nil, updated_at:
nil> (using ==)

Those two things seem to be equal, am I wrong there?

On Mon, Aug 24, 2009 at 6:09 PM, jg<jgagne33 at gmail.com>
wrote:
> I have a very fairly simple spec
>
> it "should assign an instance variable" do
> ? get ''new''
> ? assigns[:city].should == City.new
> end
>
> In my controller
>
> def new
> ?@city = City.new
> end
>
> but when I run it, I get
>
> ''CitiesController GET ''new'' should assign an
instance variable'' FAILED
> expected: #<City id: nil, name: nil, created_at: nil, updated_at:
> nil>,
> ? ? ? ? got: #<City id: nil, name: nil, created_at: nil, updated_at:
> nil> (using ==)
>
> Those two things seem to be equal, am I wrong there?
According to ActiveRecord, two objects with nil IDs are not considered
to be equal. Try this in script/console and you''ll see:

$ City.new == City.new
=> false

HTH,
David

On Aug 25, 2009, at 1:09 AM, jg wrote:
> I have a very fairly simple spec
>
> it "should assign an instance variable" do
>   get ''new''
>   assigns[:city].should == City.new
> end
>
> In my controller
>
> def new
>  @city = City.new
> end
>
> but when I run it, I get
>
> ''CitiesController GET ''new'' should assign an
instance variable'' FAILED
> expected: #<City id: nil, name: nil, created_at: nil, updated_at:
> nil>,
>         got: #<City id: nil, name: nil, created_at: nil, updated_at:
> nil> (using ==)
>
> Those two things seem to be equal, am I wrong there?
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
Your controller is okay.

Try to change your test like this:

it "should assign an instance variable" do
   City.should_receive(:new).and_return(@city = mock_model(City))
   get ''new''
   assigns[:city].should == @city
end

That way, you are comparing the same object instance => it should pass.

Best regards,
Christoph

Ahh, got it! Thanks alot guys.

On Aug 25, 2:09?am, Christoph Schiessl <c... at proactive.or.at>
wrote:
> On Aug 25, 2009, at 1:09 AM, jg wrote:
>
>
>
>
>
> > I have a very fairly simple spec
>
> > it "should assign an instance variable" do
> > ? get ''new''
> > ? assigns[:city].should == City.new
> > end
>
> > In my controller
>
> > def new
> > ?@city = City.new
> > end
>
> > but when I run it, I get
>
> > ''CitiesController GET ''new'' should assign
an instance variable'' FAILED
> > expected: #<City id: nil, name: nil, created_at: nil, updated_at:
> > nil>,
> > ? ? ? ? got: #<City id: nil, name: nil, created_at: nil,
updated_at:
> > nil> (using ==)
>
> > Those two things seem to be equal, am I wrong there?
> > _______________________________________________
> > rspec-users mailing list
> > rspec-us... at rubyforge.org
> >http://rubyforge.org/mailman/listinfo/rspec-users
>
> Your controller is okay.
>
> Try to change your test like this:
>
> it "should assign an instance variable" do
> ? ?City.should_receive(:new).and_return(@city = mock_model(City))
> ? ?get ''new''
> ? ?assigns[:city].should == @city
> end
>
> That way, you are comparing the same object instance => it should pass.
>
> Best regards,
> Christoph
>
> _______________________________________________
> rspec-users mailing list
> rspec-us... at
rubyforge.orghttp://rubyforge.org/mailman/listinfo/rspec-users